High performance LM3914/LM3915 VU meter circuit projects that widely popular can display with 20 LEDs on stereo or mono with 10 LEDs for all audio system.
The digital clock circuit board using LM8365,alarm and relay control, alert 2 times in 24 hour,backup battery power outage. Show dates, months or seconds
This is daylight sensor switch circuit, for control load turn on when have sunlight. use simple circuit LDR,transistor,relay and can use with 12V supply
Here is ic 555 inverter circuit. is easy and small size. Because use NE555 and MOSFET as main. When use source is 12V battery will have output of 100 watts.
The digital clock circuit that electronic amateurs are most interested. And The clock ICs that most popular are LM8361, MM5387,
This is DC switching power supply circuit with PCB, adjustable voltage 0-45V at 8A current max. low ripple and noise. full protection as most good supply
The Hi Fi preamplifier circuit project to tune smooth bass-treble, with a very low distortion. Use low noise transistors Frequency response range 20Hz-20KHz