Simple Traffic Light Controller

54 years ago

Here the simple traffic light controller which is could be used to educate kids rudiments of traffic light guidelines. The…

Simple Electronic Combination Lock

54 years ago

The following diagram is a very easy and simple electronic combination lock based on IC LS7220. Component Part List: C1…

Wailing Alarm Siren

54 years ago

Here is the wailing alarm siren circuit diagram: Components List: R1,R5___________ 4.7K R2______________ 47K R3______________ 10K R4______________ 100K Rx______________ *see…

1.5V and 9V Battery Tester

54 years ago

Here is the circuit diagram of battery tester designed by Matthew B.. This circuit can be used to measure the…

12W Audio Amplifier based MOSFET 2SK135 / 2SJ50

54 years ago

This is a small 12W audio amplifier over a load of 8 Ω, that combining the NE5534 integrated with a…

NiCAD Battery Charger with Current and Voltage Limiting

54 years ago

The following diagram is the schematic diagram of Ni-CAD battery charger circuit which featured with current and voltage limiting to…

200W Power Amplifier Using Transistor

54 years ago

This is a 200W power amplifier circuit project. The circuit features high power, good definition and very low noise. It…

120W Power Amplifier + Power Supply

54 years ago

This is 120W power amplifier schematic using TO-3 package complementary transistors, NPN and PNP polarity. The well-known power transistor pair…

220V 800W Lamp Flasher

54 years ago

This is 220V 800W lamp flasher circuit directly connected to 220V mains. One or more lamp which has high consumption…

2 x 5W Stereo Audio Amplifier based TA7227 + Tone Control

54 years ago

The following circuit is a 5W stereo audio amplifier, built based on single amplifier IC TA7227. The TA7227 can be…