Home Telephone Call Recorder

This is the circuit connection of home telephone call recorder that uses very few components. In order to understand its…

55 years ago

12W Audio Amplifier based MOSFET 2SK135 / 2SJ50

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

55 years ago

70W OCL Power Amplifier

This is the circuit diagram of 70W OCL power amplifier with output power of 70 watts single channel. It uses…

55 years ago

5VDC Single Polarity to 12VDC Dual Polarity Converter

This is the circuit diagram of 5VDC single polarity to 12VDC dual polarity converter based on IC LM2595-12 from National…

55 years ago

0-60V / 0-2A Variable Power Supply

This is the circuit diagram of 0-60V / 0-2A variable power supply. Of course this circuit used to cover the…

55 years ago

7 Segment LED Digital Clock with IC MM5314N

This is the circuit diagram of digital clock based on IC MM5314N. The clock display uses 6 pieces of 7…

55 years ago

LED Indicator for 220V AC Mains

This is the schematic diagram of LED indicator for 220V AC Mains which can be used to indicate that the…

55 years ago

12 Stage Water Level Indicator

The is a simple and versatile 12 stage water level indicator circuit which will show you the current water level…

55 years ago

Metronome Sound Generator

This is the electronic circuit diagram of metronome sound generator. The circuit featured adjustable volume and beats/minute with potentiometers. LED…

55 years ago