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Amplifier for Mobile Phone
You can use this simple Amplifier to hear Music from Mobile Phone or MP3 player. It gives very clear sound through two 8 ohm speakers. It uses two identical circuits for Stereo operation. IC LM386 is...
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Burglar Alarm
This simple circuit gives a warning alarm when somebody passes in front of it. It can be used to monitor doors and passages. The circuit uses an LDR (Light Dependent Resistor) as light sensor. LDR has...
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Fast Charge 18650 Battery with IP 2312 Module
Here is a setup to charge 18650 Lithium battery quickly. The commonly using Lithium battery charger module TP 4056 can deliver only 1 Amps current to charge the battery. Chip IP 2312 based Lithium...
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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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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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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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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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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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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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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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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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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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Heat Detector
School Project 2 – Simple Fire Alarm. Beeps loudly when it detects Fire. NTC Thermister 1K detects heat and conducts. Reset pin of IC NE 555 becomes high and IC triggers. Output from the IC activates...
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Automatic Street light
Automatic Street light Circuit School Project 1 . Simple LDR controlled White LED light. Automatically turns on in the evening and turns off in the morning. Adjust VR1 to set the sensitivity of LDR...
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Cc Cv Lithiuim Ion Battery Charger
This Constant current Constant voltage charger module can be used to charge Lithium Ion batteries or other batteries. It is a 5 Amps 75 Watts Xl4015 DC DC converter and the the output voltage can be...
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How to maintain Tubular Battery
Battery maintenance is very important when we use Home inverters. Generally Tubular batteries are recommended due to its high efficiency and life span. Various makes and types are of batteries are...
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Continuity Tester
Test the continuity in wires, PCB tracks, Fuses Bulbs etc using this simple Continuity tester. Buzzer sounds and LED lights when there is continuity between the Probe’s contact points.
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Locker Guard
Protect the Home Locker with this simple Alarm. When somebody opens the Locker, it sounds an alarm till the locker is closed again. Idea of the circuit is simple. When the circuit is placed inside a...
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Multi Siren Generator
A single low power IC UM 3561 can make four different siren tones just changing its pin connections. Its pin 5 is Vcc and needs only 3 volts from two pen cells. Maximum Vcc should be 4.5 volts. It is...
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