PIC Controlled Navigation Board by 1490 Digital Compass

This project is PIC16F84 or PIC16F628 controlled navigation board based on Robson Company's 1490 digital compass.

GLCD Audio Spectrum Analyzer by Atmel ATmega8

Here is an audio spectrum analyzer project using an SG12232C GLCD module and based on Atmel ATmega8 microcontroller.

Bicycle Dynamo Regulator and Source Controller

Here is a bicycle dynamo regulator and battery charger circuit which is suitable for 6V/3W generator systems and 6V NiCd/NiMH rechargeable batteries.

High Voltage Power Supply with 300V and 600V DC Output

This one is a high voltage power supply circuit that gives an output of +600V DC. The circuit acts as a full wave voltage doubler and when mains voltage (230V) applied to the input the output DC level becomes nearly 600V DC.

High Power FM Wireless Microphone

This one is a high power FM wireless microphone that provides very good frequency stability in about 1km range and very good microphone sensitivity. It can be used inside guitars, as a part of remote control systems or in other similar applications.

Multi Channel Audio Mixer by 2N3819 JFET

Here is a multi channel audio mixer circuit based on 2N3819 n-channel JFET. It mixes as many as inputs into one channel.