Misc

Safe Constant Current SourceSafe Constant Current Source

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 AmplifierLoad Cell Amplifier

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 RelaySolid State Relay

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 Monitor12V Lead-Acid Battery Monitor

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 LockSimple Electronic Combination Lock

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 OscillatorAdjustable Sine/Square Wave Oscillator

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 Switch220V Touch Switch

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 RepellentInsect Repellent

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 SwitchTone Detector / Sound Activated Switch

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 RelayMini Voice Operated Relay

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