Lithium Battery Charger
This battery charger circuit is used to recharge the rechargable lithium battery. The circuit comes from Molicel. Charging is accomplished…
One Chip AM Radio Receiver
Here is the AM Radio receiver circuit diagram based on old single IC MK484. Components List: R9, R10_________ 6R8 R6_____________…
25W Low Power Inverter
This is 25W low power inverter which contain of only 9 parts and turn 10VDC - 16VDC into 115V /…
6-12V Variable Regulated Power Supply
This is an adjustable / variable power supply which have adjustabled output voltage from 6-12 DC volt. This power supply…
Dark and Light Activated Relay
This is the basic dark and light sensor which using photoresistor as sensing component. The transistor act like as a…
Three Stage 9V FM Transmitter
This circuit is a powerful three stage, 9V FM transmitter (Tx) with a range of up to 1 kilometer in…
Wailing Alarm Siren
Here is the wailing alarm siren circuit diagram: Components List: R1,R5___________ 4.7K R2______________ 47K R3______________ 10K R4______________ 100K Rx______________ *see…
12VDC to 9VDC Converter
This is a 12VDC to 9VDC converter circuit. You may use this DC to DC stepdown converter circuit if you…
Basic RF Oscillator
If you're interested in RF circuit, then you should know about this basic RF oscillator. This basic RF oscillator circuit…