Schematics

Power Amplifier

Preamplifier

Audio mixer

Audio Equalizer

DC Protection

Headphone Amplifier

Vu Meter

Tube amplifier

Loudspeakers Active crossover

Audio Filter

Audio misc

Auto - car

FM transmitter

LED

Alarm

Power Supply

Motor control

Robot

Timer generator oscilator

Computer

Microcontroller programmer PIC AT

Digital

Light controller

Laser

RF transmitter receiver

IR infrared

Medicine

Meter  Tester

Video

Switch control

Solar

RC modeling

Musical instruments

Miscellaneous

Game

Data acquisition

Telephone

     RF circuit

• Aircraft Radio Communications Receiver

• Aircraft circuit Receiver

• X band radar detector

• TDA7000 receiver

• 10 GHz radar detector

• 2.4 GHz low noise amplifier with the BFG480W

• 2.45 GHz power amplifier with the BFG480W

• 200MHz - 400MHz VOLTAGE CONTROLLED OSCILLATOR

• 300MHz AM, RF remote control receiver & transmitter

• 450 watt 6m amplifier

• A remotely-tuned loop receiving antenna for LW and MW

• AM Band Antennas

• AM oscillator - transmitter

• AM RF amplfier for external antennas

• AM Transmitter Circuits

• AM-receiver for aircraft communication

• AM-transmitter

• Antenna splitter

• BF981 tuneable RF pre-amplifier for FM and TV VHF DX

• Bi-Directional 2.4 GHz One Watt Amplifier With Receive Pre-Amp

• Bi-Directional 900 MHz Six Watt Amplifier With Receive Pre-Amp

• Bidirectional telephone line simulator

• DCF77 receiver

• DCF77 receiver

• DTMF generator/decoder

• DTMF microphone

• Field strength meter

• FM broadcasting hobby

• FOX - two transistor 40 milliwatt fox transmitter

• FOX-750 - three transistor 750 milliwatt fox transmitter

• Harry's homebrew homepage RF circuit

• High voltage RF oscillator for driving multipole ion guides

• Homebrew RF Test Equipment and Software Attenuator Pads, Cable Reflection Tester, 2.4 GHz Quarter-Wave Power Divider/Combiner, Audio/Video Transmitter Link Test, LED RF Signal Meter, Spectrum Analyzer, 2.4 GHz RF Power Meter / SWR Meter, Return Loss Bridge, Antenna Analyzer

• Lightning detector

• Lightning detector circuit

• Low cost wireless network

• Low Distortion Crystal Oscillator

• Magnetic-radiation remote-control

• Medium Wave (MW) Simple Active Antenna BF981

• One Transistor FM Radio

• One Watt 2.45 GHz Linear Amplifier

• Pulsed tone FM tracking transmitter

• Radio circuits

• Radio Controlled RC Planes, Cars, Boats, Homemade RC electronic projects

• Radio wave alarm

• Rason project page

• RC-design

• RDS ENCODER RADIO DATA SYSTEM Encoder

• Reflex Receivers

• RF amplifier for ferrite bar antennas

• RF Field Strength Probe (AT90S1200A)

• RF circuit projects

• RF signal meter with LED

• Short Wave AM Transmitter

• Solar powered AM radio

• Spread spectrum (DSSS) voice link

• Télécommande radio 300MHz pour télescope

• Two transistor radio

• UHF radio direction finding 2 meter tracking (146 Mhz)

• VCO voltage controlled oscillator

• VLF Radio Receiver Schematic

• Walkie Talkie Schematic

• Wireless antenna interface