Rangkaian Lampu LED Sepeda Motor ini sangat sederhana yang hanya menggunakan beberapa komponen saja tapi hasilnya sangat memuaskan. Konsumsi dayanya sangat kecil cukup 6 Volt saja sangat cocok untuk sepeda motor anda.The 555 circuit below is a flashing bicycle light powered with four C,D or AA cells (6 volts). Two sets of 20 LEDs will alternately flash at approximately 4.7 cycles per second using RC values shown (4.7K for R1, 150K for R2 and a 1uF capacitor).
Share on Tumblr The DC Motor used in many applications, and some applications requires speed control of DC motor some times it requires rotation direction control. Here the simple DC motor speed control PWM circuit is constructed by using IC 555 and motor driver IC L293D. In following schematic IC 555 timer acts as a PWM generator and H Bridge motor driver IC L293D takes responsibility to.
Time intervals for the two lamps are about 107 milliseconds (T1, upper LEDs) and 104 milliseconds (T2 lower LEDs). Two transistors are used to provide additional current beyond the 200 mA limit of the 555 timer.
A single LED is placed in series with the base of the PNP transistor so that the lower 20 LEDs turn off when the 555 output goes high during the T1 time interval. The high output level of the 555 timer is 1.7 volts less than the supply voltage.Adding the LED increases the forward voltage required for the PNP transistor to about 2.7 volts so that the 1.7 volt difference from supply to the output is insufficient to turn on the transistor. Each LED is supplied with about 20mA of current for a total of 220mA. The circuit should work with additional LEDs up to about 40 for each group, or 81 total.
The circuit will also work with fewer LEDs so it could be assembled and tested with just 5 LEDs (two groups of two plus one) before adding the others.Source: http://www.diyelectronicsprojects.com/. For control unit is implemented not expensive MCU ATTYNI2313 (Atmel), which can drive direct LED (up to 20 mA on each pin). As you can see on the schematic, 24 LED’s are grouped in 4 groups, each one consist 6 LED’s. LED’s in group 1 indicate the content of register r0 of MCU, LED’s in group 2 – r1, LED’s in group 3 – r3 and LED’s in group 4 indicate the content of register r3. Dynamic indication do this, as in each moment of time indicates content of one register and scans them consecutive. For instance, when the content of r1 is loaded in output port (PORTB), the transistor Q2 is switched 'ON', and the LED of group 2 indicate the bits in r1. Alarm Motor Sederhana- Setelah saya amati keinginan para pembaca saya mencoba menyimpulkan bahwa kebanyakan pembaca mayoritas menyukai rangkaian yang sederhana semisal ini yang saya kutip dari dytoshareforum.forumotion.net.
Rangkaian Alarm ini sangat sederhana sekali, siapapun pasti bisa memasangnya. Silahkan disimak.berguna untuk menghindari terjadinya pencurian sepeda motor. Berikut ini akan saya tuliskan bagaimana membuat alarm sendiri. Sirine dari alarm keamanan adalah menggunakan klakson yang sudah ada pada motor anda. Cara kerja dari alarm yang saya buat ini adalah mematikan arus CDI sehingga mesin tidak dapat dihidupkan. Apabila kunci kontak dipaksa berada pada posisi ‘ON’ maka klakson akan berbunyi secara terus menerus walaupun kunci kontak dikembalikan pada posisi ‘OFF’ klakson akan tetap berbunyi.
Hal ini pasti akan membuat sang pencuri menjadi panik dan memilih untuk kabur, hahaha.Alat yang perlu disiapkan:1. Solder dan timah2. Isolasi kabelBahan yang perlu disiapkan:1. Saklar (switch) 3 kaki.Rp 2.5002. Relay 4 kaki.Rp 15.0003. Soket relay.Rp 5.0004. Kabel 3 meter.Rp 4.500Diagram kelistrikan alarm.
Memasang saklar alarm:Saklar alarm diletakkan pada daerah yang sulit dijangkau yaitu dibawah jok, seperti pada gambar dibawah. Potong kabel negatif CDI yang berwarna hitam bergaris putih, lalu sambungkan ke saklar alarm yang berkaki 3. Perhatikan posisinya!! Kabel dari cdi menuju ke saklar dipasang pada kaki nomer 1 (pinggir) sedangkan kabel dari potongan cdi menuju bodi itu dipasang pada kaki nomer 2 (tengah).
Kemudian siapkan kabel panjang pada kaki nomer 3 (pinggir) menuju klakson, biarkan dahulu kita lanjut langkah memasang relay dulu yee. Pengetesan:Selesai merakit rangkaian diatas, ada baiknya kita melakukan pengetesan sistem alarm yang kita buat itu.Pertama, posisikan saklar alarm berada pada posisi OFF, kemudian nyalakan kunci kontak pada posisi ON (seharusnya tidak terjadi apa2). Kemudian hidupkan mesin (seharusnya mesin dapat hidup dengan sempurna), lakukan pengetesan pada klakson, teeet teeet teeet (seharusnya klakson dapat berfungsi normal). Jika semua terasa baik kemudian matikan kunci kontak pada posisi OFF.Kedua, posisikan saklar alarm berada pada posisi ON, kemudian nyalakan kunci kontak pada posisi ON (seharusnya klakson akan berbunyi). Kemudian coba hidupkan mesin (seharusnya mesin tidak dapat dihidupkan).
Langkah terakhir adalah mematikan kunci kontak ke posisi OFF (seharusnya klakson akan tetap berbunyi, berbunyi, dan teruuus berbunyi.)Langkah terakhir adalah mematikan bunyi klakson alarm yang sanggup membuat telinga bergetar, bergetar dan bergetar. Cabut kunci kontak, buka jok, kemudian matikan alarm dengan memindahkan saklar alarm ke posisi OFF.Demikian ulasan tentang uraian singkat sistem alarm pada sepeda motor. Semoga bermanfaat gan, Thanks.http://dytoshareforum.forumotion.net. Microcontrollor AT89C2051 and H-Bridge driver L293D were used to control direction and speed of motor.Fig 1.
Circuit diagram of my Robot.Fig 2. Circuit diagram of Infrared sensors and comparators.Fig 4. Position of sensors, left hand side is side view and right hand side is top view.SoftwareSoftware for write to AT89C2051 is,which was written by C-language,the source code is compiled by using MC51 in TINY model with my start up code.MPEG filesSample of competition between 2051 and 68HC11. (1,303kB). (373kB)Source:Contact Owner: [email protected]. Skema Rangkaian Jam DigitalKumpulan Skema Elektronika- Jam Digital dengan Seven Segmen. The Clock Controller V1.1was designed to be an exemplary of using 'C' language to control timer0interrupt, 7-segment LED and keypad scanning.
It provides 1-bit sink currentdriving output, for driving a relay, opto-triac, say. Many projects requiring7-segment display and keypad interfacing may get the idea from the Clockcircuit and software.HardwareFigure 1 shows a circuitdiagram of the Clock Controller V1.1. P10-P1.7 drives 7-segment commonanode LED with sink current.
P3.0-P3.3 also drives a base pin of 4-PNPtransistor, 2n2907 with sink current. As shown in the figure, the 2nd 2-digitLED that connected to P3.2 and P3.3 is rotated 180 degrees to the 1st 2-digitallowing the pt.
Segment to be used for 1 second blinking. P3.0-P3.3 alsoconnects four momentary switches while the other legs are tied to inputport P3.4. During display and key switch scanning, a logic '0' is shiftedfrom P3.0 to P3.3, if there was a key pressed, P3.4 then became low.P3.7 is a 1-bit sink current driving, an example in the circuit uses a2n2907 to drive a small electromechanical relay 5V, say.Source: http://www.kmitl.ac.th.
Skema Rangkaian Interkom Kualitas TinggiKumpulan Skema Elektronika- Interkom Kualitas Tinggi. This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) relay circuit. Only 2 wires are required to connect the units together. Due to the low output impedance of the mic preamp, screened cable is not necessary and ordinary 2 core speaker cable, or bell wire may be used.The schematic can be broken into 34 parts, power supply, mic preamp, audio amplifierand PTT circuit.
The power supply is designed to be left on all the time, which is why no on / off switch is provided. A standard 12 V RMS secondary transformer of 12VA will power the unit. Fuses are provided at the primary input and also secondary, before the rectifier. The 1 A fuse needs to be a slow blow type as it has to handle the peak rectifier current as the power supply electrolytics charge from zero volts.The microphone amplifier is a 2 transistor direct coupled amplifier. BC108B transistors will work equally well in place of the BC109C transistors. The microphone used is a 3 terminal electret condenser microphone insert. These are popular and require a small current to operate.
The preamp is shown in my audio circuit section as well, but has a very high gain and low distortion. The last transistor is biased to around half the supply voltage; this provides the maximum overload margin for loud signals or loud voices. The gain may be adjusted with the 10k preset.
Sensitivity is very high, and a ticking clock can easily be heard from the distantloudspeaker.The amplifier is based on the popular National Semiconductor LM380. A 50 mV input is all that's required to deliver 2W RMS into an 8 ohm loudspeaker. The choice of loudspeaker determines overall sound quality. A small loudspeaker may not produce a lot of bass, I used an old 8 inch radio loudspeaker. The 4.7u capacitor at pin 1 of the LM380 helps filter out any mains hum on the power supply. This can be increased to a 10u capacitor for better power supply rejection ratio.The push to talk (PTT) circuit is very simple.
A SPDT relay is used to switch between mic preamplifier output or loudspeaker input. The normally closed contact is set so that each intercom unit is 'listening'. The non latching push button switch must be held to talk. The 100u capacitor across the relay has two functions. It prevents the relays back emf from destroying the semiconductors, and also delays the release of the relay. This delay is deliberate, and prevents any last word from being 'chopped' off.Setting Up and TestingThis circuit does not include a 'call' button.
With this intercom pressing the Push to Talk button sends your voice to the opposite station, and vice versa. Setup is simple, set to volume to a comfortable level, and adjust the mic preset while speaking with 'normal volume' from one meter away. You do not need to be in close contact with the microphone, it will pick up a conversation from anywhere in a room. If the units are a long way away, there is a tendency for the cable to pick up hum, or radio interference. There are various defenses against this. One way is to use a twisted pair cable, each successive turn cancels the interference from the turn before. Another method is to use a small capacitor of say 100n between the common terminal of each relay and ground.
This shunts high frequency signals to earth. Another method is to use a low value resistor of about 1k. This will shunt interference and hum, but will shunt the speech signal as well. However as the output impedance of each mic preamp is low, and the speech signals are also low,this will have little effect on speech but reduce interference to an acceptable level.Source: www.zen22142.zen.co.uk. Skema Rangkaian Interkom Pintu SederhanaDescription:Kumpulan Skema Elektronika- Interkom Pintu Sederhana,A simple Intercom made with a single transistor and low power audio amplifier LM386. The circui uses 8 ohm speakers, which also double as a microphone.Circuit:For the first time, this circuit was is a Canadian/English design and designed by Mr Laurier Gendron of Burnaby in British Columbia, Canada, and myself.
Please make sure you visit Laurier's web site, Handy Dandy Little Circuits. This page is also available in French by clicking on the flag.In this doorphone circuit, an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, providing low input impedance to match the speaker and good voltage gain.The 270k resistor provides simple DC bias and the load resistor is 27k.
The speaker produces a weak varying DC output when used as a microphone typically several 100uV. This varying DC signal must be separated from the fixed DC bias voltages and this is done by the 100u and 0.47u capacitors.An LM386 is used in non-inverting mode as a power amplifier to boost voltage gain and drive the 8 ohm speaker. The 10k potentiometer acts as the volume control, and overall gain may be adjusted using the 5k preset.
The gain of the LM386 can be as high as 200, this is required because of the small audio signal from the speaker. The double pole double throw switch, reverses the loudspeaker positions, so that one is used to talk and the other to listen. Manually operating the switch (from inside the house) allows two way communication.Source: www.zen22142.zen.co.uk. Extremecircuits.netSwitching power supply whose output voltage is appreciably lower than its input voltage has an interesting property: the current drawn by it is smaller than its output current. However, the input power (UI) is, of course, greater than the output power. There is another aspect that needs to be watched: when the input voltage at switch-on is too low, the regulator will tend to draw the full current. When the supply cannot cope with this, it fails or the fuse blows.
It is, therefore, advisable to disable the regulator at switch-on (via the on/off input). Until the relevant capacitor has been charged. When the regulator then starts to draw current, the charging current has already dropped to a level which does not overload the voltage source.Circuit diagram. Soft Start Circuit For Switching Power SupplyThe circuit in the diagram provides an output voltage of 5 V and is supplied by a 24 V source. The regulator need not be disabled until the capacitor is fully charged: when the potential across the capacitor has reached a level of half or more of the input voltage, all is well. This is why the zener diode in the diagram is rated at 15 V. Many regulators produced by National Semiconductor have an integral on/off switch, and this is used in the present circuit.
The input is intended for TTL signals, and usually consists of a transistor whose base is accessible externally. This means that a higher switching voltage may be applied via a series resistor: the value of this in the present circuit is 22 kΩ. When the voltage across the capacitor reaches a level of about 17 V, transistor T1 comes on, whereupon the regulator is enabled.Source: National Semiconductors. The transistors are 2SC3858 (NPN) and 2SA1494 (PNP), and feature high bandwidth, excellent safe operating area, high linearity and high gain.
Driver transistors are 2SC5200 (NPN) and 2SA1943 (PNP). All devices are rated at 230V, with the power transistors having a 150W dissipation and the drivers are 50W.This circuit describes an amplifier, power supply and tests procedures that are all inherently dangerous. Nothing described in this article should even be considered unless you are fully experienced, know exactly what you are doing, and are willing to take full 100% responsibility for what you do. There are aspects of the design that may require analysis, fault-finding and/or modification. As the name suggests All Q,C and ZD the Bias and buffer phases.
Its main goal is to provide a stable MOSFET Gates and offset voltage and the voltage buffer amplifier stage of the High Resource capacity. What would have without the phase response and the effect Slew rate is indeed very bad. The flip side of the coin is not the extra step Introduction of an additional dominant pole in the amplifier feedback loop.Also to what the name suggests this stage converts the voltage developed in the VAS and provides all the amps required to drive at 8 or 4 ohms. 2-ohm loads are possible for several minutes at a time.
In fact, I have tested more than 1600 1kW amplifier Watts RMS at 2 ohms. But that would not be recommended as a long-term exposure at all. If it is higher than the figures of the STI-amp.
Power to the AV amplifier 800 The components of the power for this amplifier are as follows, and are favored A channel or a power module alone. 1 toroidal transformer with a rating of 1kVA. Primary windings are made to fit. Rangkaian ini merupakan proyek dengan biaya murah dan mempunyai fungsi yang sangat besar.Rangkaian sederhana ini mampu menghidupkan lampu neon sampai dengan 40 Watt yang berfungsi untuk penerangan darurat disaat aliran listrik PLN mati.Raangkaian Lengkap:Skema Rangkaian Lampu DaruratGambar Cara Melilit KawatKomponen yang dibutuhkan sebagian dapat menggunakan dari barang-barang bekas yaitu:1. Lempeng pendingin dari plat metal ukuran 3 x 4 cm dapat diperoleh dari flat bekas dengan ketebalan kira-kira 1mm2.
Batang Ferrit diperoleh dari bekas radio mw atau radio sw. (radio jadul bekas kakek dan nenek lho ).3. Kawat email bisa diperoleh dari trapo balast.4. Baut ukuran kecil secukupnya.5. Accu Mobil atau Motor.6. Kertas Koran secukupnya.7.
Kotak sabun atau apa saja untuk penempatan rangkaian.9. Timah Solder Secukupnya.10. Kabel Secukupnya.Komponen Elektronik.1. Transistor TIP 3055.2. Resistor 180K.3. Resistor 47K.4.
Capacitor 100 nf.5. Capacitor 100 uf.Cara membuat Lilitan lihat gambar ilustrasi).1.
Bungkus batang ferite dengan kertas lalu lilitkan kawat sebanyak 58 lilitan denga jarak renggang.2. Setelah selesai membuat lilitan 1 kemudian bungkus lagi dengan kertas koran lalu lilitkan kawat sebanyak 13 lilitan dengan jarak yang lebih renggang.3. Bungkus kembali lapisan ke dua dan terakhir lilitkan kawat sebanyak 450 lilitan dengan jarak sangat rapat lilitan.4. Supaya Lilitan kuat dan tidak berubah bisa disiram dengan lem.5. Ujung-ujung kawat untuk penyolderan haraf diperhatikan titik-titik nya dan harus di kelupas lapisan emailnya.Source: http://forum.terserahlu.us.
All distances mentioned before can vary, depending on infra-red transmitting and receiving LEDs used and are mostly affected by the color of the reflecting surface. Black surfaces lower greatly the device sensitivity. Obviously, you can use this circuit in other applications like liquids level detection, proximity devices etc.Note:. The infra-red Photo Diode D2, should be of the type incorporating an optical sunlight filter: these components appear in black plastic cases. Some of them resemble TO92 transistors: in this case, please note that the sensitive surface is the curved, not the flat one.
Avoid sun or artificial light hitting directly D1 & D2. If your car has black bumpers, you can line-up the infra-red diodes with the (mostly white) license or number plate.
It is wiser to place all the circuitry near the infra-red LEDs in a small box. The 3 signaling LEDs can be placed far from the main box at an height making them well visible by the car driver. The best setup is obtained bringing D2 nearer to D1 (without a reflecting object) until D5 illuminates; then moving it a bit until D5 is clearly off. Usually D1-D2 optimum distance lies in the range 1.5-3 cm.List Component of Car Parking Sensor circuit:R1: 10KR2,R5,R6,R9: 1KR3: 33RR4,R11: 1MR7: 4K7R8: 1K5R10,R12-R14: 1KC1,C4: 1µF/63VC2: 47pFC3,C5: 100µFD1: Infra-red LEDD2: Infra-red Photo Diode (see Notes)D3,D4: 1N4148D5-7: LEDs (Any color and size)IC1: NE555IC2: LM324IC3: LM7812. Rangkaian Lampu Sein Sepeda Motor. Lampu Sein akan lebih indah apabila kita modif sedemikian rupa supaya kelihatannya lebih menarik apalagi dibuat sendiri membuat perasaan lebih bangga dan ini bisa menjadi proyek bisnis buat anda yang hobi memodifikasi sepeda motor atau yang lainnya.
Rangkaian ini sangat sederhana dan sangat mudah cara pembuatannya.Skema Rangkaian Lampu Sein Sepeda MotorRangkaian ini sangat irit pemakaian arusnya sehingga Accu anda tidak akan cepat habis atau soak, komponen yang diperlukan sangat mudah sekali untuk didapatkan. Satu Rangkaian hanya untuk satu sisi.Hasilnya kira2 akan seperti ini:Contoh Hasilnya. Penyambungan KabelA: Ke AccuB: Ke kontak setelah dipotongC: Ke PulserD: Ke sistem pengapian CDI, elektrik starter, lampu rem, lampu sign dsb.E: Ke massaCARA KERJA RANGKAIAN:Rangkaian dibuat sedemikian rupa sehingga saat standby maupun saat dioperasikan betul-betul tidak berpengaruh terhadap kinerja sepeda motor tersebut. Rangkaian akan bekerja saat kontak di ON kan.Saat kunci kontak di ON kan arus dari accu melalui kunci kontak dan S2 akan langsung ke alarm (AL) yang dikendalikan oleh SCR 2P4M.Sementara itu secara bersamaan arus juga akan ke titik B dan ke gate SCR melalui resistor 47 K ohm yang akan memicu SCR dan langsung akan menyebabkan SCR tersebut bekerja.
Dengan demikian SCR akan ON dan alarm (AL) akan mendapat tenaga dan berbunyi.Meskipun kontak di OFF kan sirine akan tetap dioperasikan karena SCR mengunci (laching). Bersamaan dengan itu rangkaian relay yang dikendalikan oleh transistor 1 dan 2 belum bekerja, sehingga titik C yang dihubungkan ke pulser sepeda motor tetap akan di hubung singkatkan ke ground melalui S2. Parts List:R1 – 33K 1/4W ResistorR2 – 5K PotR3 – 1.5K 1/4W ResistorC1 – 1uF 16V Electrolytic CapacitorQ1 – 2N3565 NPN TransistorM1 – 0-1 mA Analog MeterMISC – Case, Wire, Electrodes (See Notes)Notes:.
The electrodes can be alligator clips (although they can be painful), electrode pads (like the type they use in the hospital), or just wires and tape. To use the circuit, attach the electrodes to the back of the subjects hand, about 1 inch apart. Then, adjust the meter for a reading of 0.
Ask the questions. You know the subject is lying when the meter changes.Source. Rangkaian Detektor Emas. Here the very simple and easy build gold detector circuit. The circuit capable to sense gold or metal or coins from a distance of about 20cm, depending on the size of the object to detect.The circuit oscillates at about 140kHz and a harmonic of this frequency is detected by an AM radio. You can simply tune the radio receiver until a squeal is detected.When the search coil is placed near a metal object, the frequency of the circuit will change and this will be heard from the speaker of AM radio.Below image is the construction of the circuit, you will see that the radio is placed on the hand stick of the complete detector.Skema Rangkaian Gold Detector.
Pin-out BFY61 & TIP31C TransistorThe circuit above shows a linear potentiometer connected Between Vs and 0V Such That the voltage at its wiper terminal will of always be somewhere at or Between these two voltages. The small amount of current flowing out of the potentiometer's wiper is amplified by two transistors, connected together in a configuration known as a 'Darlington pair'. The current from the potentiometer is amplified by the first transistor, and then again by the second transistor, greatly Increasing the amount of current That cans be controlled by the potentiometer.There are, however, a couple of disadvantages of this simple circuit. Firstly, about 0.7V is lost in EACH of the transistor, so the maximum voltage cans That ever be applied to the motor is Vs - 1.4V. Secondly, the transistors are not absolutely linear so the change in motor speed for a given rotation of the potentiometer will from some more subtle in the middle of its range.
Because a motor is an inductive load, it will from Produce a 'back-emf' Could the which damage to the second transistor. The 1N4148 signal diode prevents this damage by shorting out the back-emf.The power supply for this circuit should preferably be un-smoothed (i.e.
Directly from the power supply rectifier). This helps prevent the motor 'sticking' at low speeds. With the TIP31C transistor given, the maximum power supply voltage may be 60V and the maximum motor current consumption may be 3A.Source: www.eleinmec.com. The Cmos 4060 is a 14-bit binary counter. However - only ten of those bits are connected to output pins. The 4060 also has two inverters - connected in series across pins 11, 10 & 9. Together with R3, R4, R5 and C3 - they form a simple oscillator.While the oscillator is running - the 14-bit counter counts the number of oscillations - and the state of the count is reflected in the output pins.
By adjusting R4 you can alter the frequency of the oscillator. So you can control the speed at which the count progresses. In other words - you can decide how long it will take for any given output pin to go high.When that pin goes high - it switches the transistor - and the transistor in turn operates the relay. In single-shot mode - the output pin does a second job. It uses D1 to disable the oscillator - so the count stops with the output pin high.If you want to use the in repeating mode - simply leave out D1.
The count will carry on indefinitely. And the output pin will continue to switch the transistor on and off - at the same regular time intervals.Note:. Using 'Trial and Error' to set a long time period would be very tedious. A better solution is to use the Setup tables provided - and calculate the time required for Pin 7 to go high. For example, if you want a period of 9 Hours - the Range table shows that you can use the output at Pin 2.
You need Pin 2 to go high after 9 x 60 x 60 = 32 400 seconds. The Setup table tells you to divide this by 512 - giving about 63 seconds. Adjust R4 so that the Yellow LED lights 63 seconds after power is applied. This will give an output at Pin 2 after about 9 Hours. Ideally C3 should be non-polarized - but a regular electrolytic will work - provided it doesn't leak too badly in the reverse direction.
Alternatively - you can simulate a non-polarized 10uF capacitor by connecting two 22uF capacitors back to back. The were designed for a 12-volt supply.
However - provided a suitable relay is used - both circuits will work at anything from 5 to 15-volts. Applying power starts the timer. And it can be reset at any time by a brief interruption of the power supply.Sorcer: http://www.zen22142.zen.co.uk/. CN1: 6 V to 12 VDC voltage source. C1: 10uF/25V capacitor elektrolit.
C2: 0.22uF/275V capacitor elektrolit. C3: 47uF/25V capacitor elektrolit.
C4: 0.1uF/25V capacitor elektrolit. D1: LED. D2, D3: 1N4148 Dioda. PR1: 100K Variable resistor. PR2: 50K Variable resistor. Q1: TIC226 Triac.
R1: 2k2 resistor 1/2 watt. R2, R5: 1K resistor 1/2 watt. R3: 180E resistor 1/2 watt. R4: 680E resistor 1/2 watt.
U1: LM555 IC timer. U2: MOC3021. V1: 230V AC input. Z1: 100W LoadDangerous.!!This circuit directly connected to the netting of electricity, voltage 220V electricity it could sting you.
Avoid working in damp and directly with ground. Here is a simple freezer alarm circuit, but ultra sensitive with a buzzer. The circuit raises an audio alert when the temperature inside the freezer box goes up above a preset level. The circuit requires 9V dc supply and can power from a standard 9V alkaline battery.A negative temperature co-efficient type (NTC type) small thermistor (R1) here works as the freezer status sensor.
Related components (T1 and T2) are used to drive a 6 to 9V rated mechanical buzzer. When the sensor detects a temperature shoot, the buzzer starts beeping and remains in that condition, till power to the circuit is removed.
For this on/off plus reset function any small dc toggle switch can be inserted at the positive rail.Skema Rangkaian Alarm Freezer. I've drawn the circuit with a single pole relay.
But you can use a multi-pole relay if it suits your application. Only one half of the Cmos 4013 is used. So you could construct two independent toggle switches with a single IC. The circuit will work at anything from 5 to 15-volts. All you need do is select a relay with a coil voltage that suits your supply.The LED provides a visual indication that the relay is energized. In effect - it tells you whether the switch is on or off. It's not necessary to the operation of the circuit.
If you wish you may leave out R3 and the LED.Source: http://www.zen22142.zen. Pembuatan ini di ilhami ketika PLN padam seringkali saya tidak tahu bahwa PLN telah hidup kembali atau telah menyala kembali sementara genset menyala terus sampai bensinnya habis, dipikir pikir sayang listrik pakai bensin kan lebih mahal ketimbang harga Listrik PLN belum lagi Genset akan lebih cepat rusak dan panas kalau nyalanya lebih lama. Symbol komponen Listrik dan elektronik ini diperlukan ketika kita ingin membuat sebuah rangkaian atau memperbaiki sebuah alat yang berhubungan dengan listrik atau elektronik sehingga bisa ditelusuri bagian yang rusak untuk diperbaiki atau diganti komponennya.
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