Misc

Safe Constant Current Source

In the above circuit diagram, a CMOS operational amplifier (op-amp) controls the current via a P-Channel HEXFET power transistor (IRF9520)…

55 years ago

Load Cell Amplifier

I've found some interesting schematic of load cell amplifier. As we know, load cell amplifier is pretty expensive with fair…

55 years ago

Solid State Relay

This is the circuit diagram of solid state relay. In reality, it is not a relay after all. There's no…

55 years ago

12V Lead-Acid Battery Monitor

This easy circuit makes it possible to monitor the charging process to a higher level. Final adjustsments are simple and…

55 years ago

Simple Electronic Combination Lock

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

55 years ago

Adjustable Sine/Square Wave Oscillator

The following scheme diagram is the circuit diagram of simple easily tuned / adjustable sine and square wave oscillator. With…

55 years ago

220V Touch Switch

This is a circuit of a touch switch used to turn on and turn off the electronic device that is…

55 years ago

Insect Repellent

This insect repellent circuit will repel insects such as mosquitoes, flies and cockroaches from your home or yard effectively. circuit…

55 years ago

Tone Detector / Sound Activated Switch

The following circuit diagrams are tone detector circuit diagrams which also known as sound activated switch circuit. Actually, these circuits?…

55 years ago

Mini Voice Operated Relay

This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn…

55 years ago