PIC16F84A discolight effect with bass beat control
https://www.electronics-lab.com/project/pic16f84a-discolight-effect-with-bass-beat-control/
This is an early picture of my discolight effect. Because of the AGC circuit theres no need for potentionmeters for sensitivity adjust. I replaced them with trimmers. Now the microphone is on the control electronics because theres no need to place it outside the box and the possible noises from the surroundings are reduced. You […]
Synchronized multi-spark module (SMSM) for Electronic Ignition Devices (EID)
https://www.electronics-lab.com/project/synchronized-multi-spark-module-smsm-for-electronic-ignition-devices-eid/
Multi-spark ignition is very useful especially in the case of startings at low temperature and at low rpm range. Basic idea, is to apply to spark plugs instead of only one spark, a spark-burst having big energy. In this case, combustion of air/fuel mixture is much better and the emissions are more reduced. In addition, […]
Nite Rider Lights
https://www.electronics-lab.com/project/nite-rider-lights/
Description The circuit is drawn with PCB 123 which you can download for free from http://www.pcb123.com As a keen cyclist I am always looking for ways to be seen at night. I wanted something that was a novelty and would catch the motorists eye. So looking around at my fellow cyclists rear lights, I […]
Simple but reliable car battery tester
https://www.electronics-lab.com/project/simple-but-reliable-car-battery-tester/
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Description When the test button is pressed, the Car battery voltage is feed into a high impedance voltage […]
Automotive 12V to +-20V converter (for audio amplifier)
https://www.electronics-lab.com/project/automotive-12v-to-20v-converter-for-audio-amplifier/
The limitation of car supply voltage (12V) forces to convert the voltages to higher in order to power audio amplifiers. In fact the max audio power x speaker (with 4 ohm impedance) using 12V is (Vsupply+ – Vsupply-)^2/(8*impedance) 12^2/32 = 4.5Watts per channel, that is laughable… For powering correctly an amplifier the best is to […]
Car battery Indicator
https://www.electronics-lab.com/project/car-battery-indicator/
Description This is a really useful instrument for your car. It uses three LED’s to give a visual indication of the state of charge of your car battery. When the red LED is on the battery voltage is low, green is the OK signal and orange is a warning that the battery is overcharging. The […]
5.5W – 2 Channel Audio Amplifier
https://www.electronics-lab.com/project/5-5w-2-channel-audio-amplifier/
This project is a 5.5W – 2 Channel Audio Amplifier based on LA4445 IC. Description The small 2 Channel amplifier constructed around Sanyos LA4445 IC delivers 5.5Watts +5.5 Watts at 4 ohm load, supply in 12V DC 2Amp, Input impedance 30K. Specifications Dual Channels output : 5.5W Minimum External Parts Very small pop noise at […]
14W Stereo Audio Amplifier
https://www.electronics-lab.com/project/14w-stereo-audio-amplifier/
This project is a 14W Stereo Audio Amplifier based on LM4730 IC. Description 14W Stereo audio power amplifier build around LM4730 IC. The LM4730 is stereo audio amplifier capable of delivering typical 14W per channel of continues average output power a 4 Ohms or 8 Ohms load with less than 10% THD+N from 20Hz to […]
Mini Audio Amplifier
https://www.electronics-lab.com/project/mini-audio-amplifier/
This project is a mini Audio Amplifier based on LM386 IC. Description The Mini Audio Amplifier project is a good choice for battery operated gadgets. It is based on Texas instruments LM386 IC, provides high quality Audio. Specifications Wide power supply input 6 to 12 VDC 500 mW output @ 8 Ohms load Takes standard […]
MIC Pre-amplifier
https://www.electronics-lab.com/project/mic-pre-amplifier/
This project is a microphone pre-amplifier based on LM358. Description This is an easy to construct microphone pre-amplifier project using a compact electret condenser microphone. The pre-amplifier is the important building block of many audio communication systems. The circuit has been built around Op-Amp LM358. Power supply : 5 to 12 VDC @ 10 mA […]