Low Cost Mosquito Repellent

55 years ago

Here is the simple and low cost mosquito repellent circuit design. The circuit serves to keep the mosquitoes out of…

6V and 12V Car Battery Charger

55 years ago

This 6V and 12V car battery charger circuit can be automatically charged, quickly and correctly, 6V and 12V batteries. Circuit…

DIY Electronic Cardlock Security System

55 years ago

Here is the DIY electronic cardlock security system that can be used as a lock to turn on dan turn…

Protector for Electronic Appliance with Three-Phase Power

55 years ago

This is the circuit design of the protector for electronic appliance with three-phase power supply. Many of electronic appliances need…

Bicycle Directional Lights

55 years ago

This is the electronic bicycle directional lights circuit that use inexpensive components and is a good substitute to many commercially…

Simple and Low Cost Dew Sensor

55 years ago

This is a simple and low cost dew sensor circuit that can be used to switch off any gadget automatically…

Six LED Stereo VU Display

55 years ago

The following image is the scheme diagram of six LED stereo VU display circuit which build using Dot/Bar Display Driver…

Home Telephone Call Recorder

55 years ago

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

12 Stage Water Level Indicator

55 years ago

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

One Chip AM Radio Receiver

55 years ago

Here is the AM Radio receiver circuit diagram based on old single IC MK484. Components List: R9, R10_________ 6R8 R6_____________…