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Flame Sensor
School Project 3 – Simple but efficient Fire Sensor. Beeps loudly when it detects Fire. Photodiode is used as the Flame Sensor. It receives IR rays from the flame and conducts. MOSFET Z44N triggers...
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Solar Street Light
School Project 4 – Solar light turns on in the evening and turns off in the morning. Fully automatic. During day time, battery charges through Diode D2. Base of Transistor BD 140 becomes high through...
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Motion Sensing Light
School Project 5. Movement Detector using PIR Motion Sensor. White LED turns on for few minutes when somebody move in front of it. Turns of automatically after the time out. IC CA3140 is used as a...
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Touch Activated Switch
School Project 6. Simply touch Point A to turn on LED and point B to turn off LED. Points C and D can be used to connect Relay to drive AC loads like Bulb and Fan. Note – Touch pads can be small metal...
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Wireless Electricity Generator
School Project 7. Here is a high efficiency Wireless Electricity Generator project. Usually, we make a simple wireless electricity generator to light 1.8 volt Red LED. But here the efficiency of the...
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Lithium Battery charge Monitor
Lithium Ion battery is now used in many devices. Unlike other batteries, in Lithium Ion battery, the charge level is expressed as percentage. Its minimum voltage is 3.6 V and maximum voltage is 4.2...
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Ultrasonic Pest Chaser
Ultrasonic Pest Chaser Here is an efficient Electronic Pest Repellent to chase Pests from home. It emits Ultrasound in the frequency 9 to 96 kHz which can be set for each Pest. Human can’t here the...
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Simple Heat Monitor
When the heat near the NTC Thermistor above the preset level, Red LED lights. Adjust the 100 K preset to set the heat level. Ideal to use in Amplifiers and heat generating devices. When the heat...
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Solar Garden Light
Simple Solar light for Garden pathway. It is relay controlled and gives full brightness to the LED strip. During day time, voltage from the 6 volt solar panel activates the relay. Its Normally Open (...
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