Minuscule circuit of the electronic heater controller presented here is built around the renowned 3-Pin Integrated Temperature Sensor LM35 (IC1) from NSC. Besides, a popular Bi Mos Op-amp CA3140 (IC2) is used to sense the status of the temperature sensor IC1, which also controls a solid-state switch...
USB Power Booster
Power shortage problems arise when too many USB devices connected to PC are working simultaneously. All USB devices, such as scanners, modems, thermal printers, mice, USB hubs, external storage devices and other digital devices obtain their power from PC. Since a PC can only supply limited power to...
12v to 5v dc dc converter circuit diagram
Power supply is needed for all of electronic circuits. Say you have a 12V power supply and you want to use it as a 5V power supply. Then use this 12v to 5v dc-dc converter circuit diagram to convert 12 volt to 5 volt. This DC converter circuit provide 5V, 1Amp at output. Here is the small schematic...
Simple L200 Charger
This circuit came about as the result of an urgent need for a NiMH battery charger. No suitable dedicated IC being immediately to hand, the author pressed an L200 regulator and a 4.7 kΩ NTC thermistor into service. Those components were enough to form the basis of a charger...
Rocket
One empty 35mm plastic film canister and lid. These are getting harder to find, but stores that develop film should have some. (The white canisters work much better than the black ones do.) If you have trouble finding canisters, you can get them HERE.One fizzing antacid tablet (such as Alka-Seltzer...
‘Green’ Solar Lamp
Energy saving is all the rage, and here is our small contribution: how much (or rather how little) current do we need to light an LED? Experiments with a super-bright 1 W green LED showed that even one microamp was enough to get some visible light from the device. Rootling in the junk box produced a...
LED Workbench Lighting
Here is a very useful workbench lighting unit for electronics hobbyists. The portable inspection lamp circuit consists of an on-board voltage regulator and a high-bright 5mm white LED. Any 9 to 18 volt dc rated ac mains adaptor, capable to source about 100mA of output current can be used to power this...
Basic single supply voltage regulator Circuit Diagram
The circuit uses a CA3140 BiMOS op amp capable of supplying a regulated output that can be adjusted from essentially 0 to 24 volts. The circuit is fully regulated. Basic single-supply voltage regulator Circuit Diag...
Aviation Intercom Circuit
Before its move offshore, I was lucky enough to be involved in developing the avionics system for the Flightship Ground Effect FS8 craft (see www.pacificseaflight.com/craft.shtml). Although officially classed as a boat, it has wings and can travel at 180km/h some three metres above the water. The communications...
AUTOMATIC OFF TIMER FOR DVD PLAYERS
Are you in the habit of falling asleep while listening to music? If yes, you’ll love this circuit. It will automatically start functioning when you switch off your bedroom light and shall turn your CD player ‘off’ after a predetermined time. In the presence of ambient...
Build a Period To Voltage Converter Circuit Diagram
The input signal drives ICD. Because ICD`s positive input (V+) is slightly offset to + 0.1 V, its steady stateoutput will be around +13 V. This voltage is sent to ICC through D2, setting ICC`s output to +13 V. Therefore, point D is cut off by Dl, and CI is charged by the current source. Assuming the...
EL Lamp Driver Using HV832MG
An EL lamp is a solid state, low power, uniform area light source. Because of its thin profile (as thin as 0.3 mm) and the fact that it can be built into almost any size and shape, EL lamps are an ideal way to provide back-lighting for LCD displays, membrane keypads and a variety of other applications....
Fuse Box BMW 1984 528I Diagram
Fuse Box BMW 1984 528I Diagram - Here are new post for Fuse Box BMW 1984 528I Diagram.Fuse Box BMW 1984 528I Diagram Fuse Panel Layout Diagram Parts: low beam relay, fog light relay, main relay, purge valve relay, normal speed relay, high speed relay, low beam check relay, high beam relay, fuel pump...
IR–S PDIF Transmitter
The best-known ways to transmit a digital audio signal (S/PDIF) are to use a standard 75Ω coaxial cable or Toslink optical modules with matching optical cable. Naturally, it can happen that for whatever reason, you cannot (or don’t wish to) run a cable between the equipment items in question. With a...
Push Off Push On
The ubiquitous 555 has yet another airing with this bistable using a simple push-button to provide a push-on, push-off action. It uses the same principle of the stored charge in a capacitor taking a Schmitt trigger through its dead-band. Whereas the Schmitt trigger in that reference was made from discrete...
Simple Infrared Remote Control Extender
This ultra-simple remote control extender is ideal for use with a hidden video recorder. The recorder is a Panasonic NV-SD200 and is used as part of a camera surveillance system. A PICAXE-08-based circuit is used to detect events and control the recorder. It also flashes a LED near the monitor to indicate...
Dimmer Control Voltage Polarity Changer Circuit
Some older Strand dimmer units used a zero to -10V control signal, and the standard analogue control voltage is zero to +10V. This project allows the easy conversion from one standard to another. This is a very simple project, but may turn out to be a lifesaver for small theatre groups and the like....
Two Wire Temperature Sensor
The Type LM35 temperature sensor from National Semiconductor is very popular for two reasons: it produces an output voltage that is directly proportional to the measured temperature in degrees Celsius, and it enables temperatures below zero to be measured. A drawback of the device is, however, that...
Cable Tester Uses Quad Latch
This circuit was designed to allow microphone cables or other cables to be easily tested for intermittent breaks that can often be difficult to find using a multimeter. The circuit can test cables with up to four cores. Both switches used in the circuit are momentary contact push-buttons and it can...
Mini Guitar Bass Amplifier
Output power: 6W into 4 Ohm load, FET input stage - Passive Tone ControlTiny, portable Guitar Amplifiers are useful for practice on the go and in bedroom/living room environment. Usually, they can be battery powered and feature a headphone output. This project is formed by an FET input circuitry, featuring...
1kH Synthetic Inductor
Inductors can be mimicked quite easily using operational amplifiers. The circuit shown here was developed to have an inductance of 1000 H (say, one thousand Henry) with good damping. Using this design you can build a resonant circuit with a center frequency of less than 1 Hz. The slow behavior allows...
An Accurate Reaction Timer Circuit
Add a cheap stopwatch to this circuit to produce an accurate reaction timer. The circuit is wired in parallel with the start/stop button in the watch via a 2.5mm socket, which fits snugly in one corner of the casing. The person conducting the test (the "tester") resets the stopwatch and turns on the...
Telephone Ringer Circuit
If you are lucky enough to have a big house, a large garden, and small children, this project just might interest you. It’s actually a telephone ringer capable of making any mains-powered device work from the ringer of your fixed line. With it, you will be able to control a high-powered siren or horn,...
Voice Bandwidth Filter
This circuit passes frequencies in the 300Hz - 3.1kHz range, as present in human speech. The circuit consists of cascaded high-pass and low-pass filters, which together form a complete band-pass filter. One half of a TL072 dual op amp (IC1a) together with two capacitors and two resistors make up a second-order...
Fire Alarm Using Thermistor
Small and simple unit, Can be used for Home-Security purposeIn this fire alarm circuit, a Thermistor works as the heat sensor. When temperature increases, its resistance decreases, and vice versa. At normal temperature, the resistance of the Thermistor (TH1) is approximately 10 kilo-ohms, which reduces...
Supply Voltage Indicator
A novel supply voltage monitor which uses a LED to show the status of a power supply.This simple and slightly odd circuit can clearly show the level of the supply voltage (in a larger device): as long as the indicator has good 12 volts at its input, LED1 gives steady, uninterrupted (for the naked eye)...
ECG Amplifier By TLC274
This circuit allows an ECG signal to be displayed on an oscilloscope. Opamps IC1a, b and d form an instrumentation amplifier with a gain of 201. IC1c amplifies the common-mode signal by a factor of 31, and supplies this signal to the right leg. The first consequence of this is that the body is brought...
Tuned Radio Frequency TRF Receiver
Superheterodyne receivers have been mass-produced since around 1924, but for reasons of cost did not become successful until the 1930s. Before the second world war other, simpler receiver technologies such as the TRF receiver and the regenerative receiver were still widespread. The circuit described...
Laser Alarm
This circuit is a laser alarm system like the one we see in various movies. It uses a laser pointer beam to secure your valuables and property. Essentially, when the beam gets interrupted by a person, animal or object, the resistance of a photodiode will increase and an alarm will be activated. The...
1W LED Driver Circuit
This circuit is designed to drive the 1W LEDs that are now commonly available. Their non-linear voltage to current relationship and variation in forward voltage with temperature necessitates the use of a 350mA, constant-current power source as provided by this supply. In many respects, the circuit operates...
Fuse Box 1991 BMW 325i Diagram
Fuse Box 1991 BMW 325i Diagram - Here are new post for Fuse Box 1991 BMW 325i Diagram.Fuse Box 1991 BMW 325i Diagram Fuse Panel Layout Diagram Parts: Headlights, High beam indicator, Headlights, Auxiliary fan, Lights/Turn hazard warning, Active check control, Glove box light, Electro-mechanical convertible...
Fuse BOx BMW Z3 Underdash 1996 Diagram
Fuse BOx BMW Z3 Underdash 1996 Diagram - Here are new post for Fuse BOx BMW Z3 Underdash 1996 Diagram.Fuse BOx BMW Z3 Underdash 1996 Diagram Fuse Panel Layout Diagram Parts: ABS system, motorsport, airbag, air conditioning, automatic transmission, anti theft sytem, cigar lighter, clock, connector...
Cell Phone RF Radiation Detector LED
From rookieelectronics: This is my favorite project, its too simple and very interesting because it does not require any voltage source. it converts RF frequency waves from cell phone (whenever you call or send a text) to little current to flash a LED.Actually this project is also called as LED...
Use Of Alignment Tools and Dial Indicators Zurn Coupling
Use Of Alignment Tools and Dial Indicators Zurn Coupling
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LTC3605A – 20V 5A Synchronous Step Down Regulator
The LTC®3605A is a high efficiency, monolithic synchronous buck regulator using a phase lockable controlled on-time constant frequency, current mode architecture. PolyPhase operation allows multiple LTC3605A regulators to run out of phase while using minimal input and output capacitance. The operating...
Simple Water Activated Alarm
The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. Under dry conditions, the transistor will have no bias current and be fully off. As the probes get wet, a small current flows between base and emitter and the transistor switches on. A larger...
2500W Phase Control
This circuit controls resistive and inductive loads up to 2,500W. Its main functional device is an integrated phase control circuit - Siemens TLE3103. It contains its own power supply, a zero voltage crossing detector circuit and a logic driver. An additional feature is the low voltage input to enable/disable...
Popular Posts
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Superheterodyne receivers have been mass-produced since around 1924, but for reasons of cost did not become successful until the 1930s. ... -
We have already seen in many of my earlier articles how triacs are used in electronic circuits for switching AC loads. Triacs are basically ... -
This project was a particular surprise for me in that the BC547 (equiv 2N2222) can be used to build a 500mW linear amplifier covering the en... -
If you are lucky enough to have a big house, a large garden, and small children, this project just might interest you. It’s actually a telep... -
A novel supply voltage monitor which uses a LED to show the status of a power supply. This simple and slightly odd circuit can clearly show ... -
A filter removes the dc component of the rectified ac, which is then scaled to RMS. The output is linear from 40 Hz to 10 kHz or higher. Cu... -
Power shortage problems arise when too many USB devices connected to PC are working simultaneously. All USB devices, such as scanners, modem... -
This circuit was designed to allow microphone cables or other cables to be easily tested for intermittent breaks that can often be difficult... -
The Type LM35 temperature sensor from National Semiconductor is very popular for two reasons: it produces an output voltage that is directly... -
This ultra-simple remote control extender is ideal for use with a hidden video recorder. The recorder is a Panasonic NV-SD200 and is used as...
