Audio FM transmitter with Stereo Input

Quality Audio FM transmitter Circuit This house FM transmitter for your stereo or any other amplifier provides a good signal strength up t...

Solar Charger with Current Regulation & Cut-Off

Solar Charger with Current Regulation & Cut-Off Here is a solar charger circuit that is used to charge Lead Acid or Ni-Cd batteries usi...

30V 1A Transformerless Power Supply

This transformerless power supply circuit is designed for medium current applications. During the negative half period, the capacitor C5 is...

TransformerLess Power Supply 12V 100mA

This is a transformerless power supply for low current applications. C1 is the X rated AC capacitor that reduces high volt AC. D1-D4 rectif...

SuperFast Rechargable Battery

SuperFast Rechargable Battery Using GoldCap Capacitors When compared to conventional disposable or rechargeable batteries, GoldCap capacito...

1.5 Watt 1-2 km Range FM Transmitter

Here is a well designed FM transmitter circuit that works effectively in 1 – 2 km range. Input source is an electret condenser microphone...

FM Telephone Transmitter

"Telephone Transmitter, FM." "Receive telephone conversations on any FM radio with this neat little device."   ...

Audio equalizer with transistors BF245 - BC109

2 Watt FM Transmitter

CIRCUIT DESCRIPTION The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified b...

SpeakerBox Filter Designer

  SpeakerBox Filter Designer is a simple and useful software for calculate the first and second order passive audio filter for 2 way and ...

Portable FM Radio

The KA22429 is a monolithic integrated circuit designed for Portable FM radio r eceiver. It is consistng of RF input stage, Mixer, IF, Mut...

USB Powered Audio Amplifier for PC

This audio power amplifier might be good solution to all of those who have PC with integrated sound card into motherboard. The main problem...

FM Transmitter 4Watt

TECHNICAL CHARACTERISTICS: Stabilised tendency of catering: Vcc=12~16V Frequency of emission: 88~108MHz Consumption: 100~400mA Circu...

SPY FM Transmitter (1.5V)

Spy FM Transmitter Circuit Schematic With Explanation

3 LED Battery Monitor

Monitor the voltage level of an automobile battery using 3 LED battery monitor circuit