Links to all pages on this site

• 1.3 Volt Power Source
• 12 Volt 30 Amp PSU
• 12VDC Fluorescent Lamp Driver
• 13 Volt 20 Amp PSU
• 15 Watt Amplifier
• 150W MP3 Car Amplifier
• 2 Transistor FM Voice Transmitter
• 2 Transistor Transmitter
• 2 Watt Audio Amplifier
• 24 Hour Timer
• 24 Second Shot Clock
• 24 Watt Class A Amplifier
• 2SC1946A 30 Watt VHF Amplifier
• 3 Band graphic equalizer
• 3 Channel Spectrum Analyzer
• 4 Band Double Tuned Preselector
• 4 Transistor Transmitter
• 40W Fluorescent Lamp Inverter
• 5 to 30 Minute Timer
• 555 Pulse Generator
• 6 Input Mixer
• 6 x 6 Loop Antenna
• 8 Watt Amplifier
• 9 Volt 2 Amp Power Supply
• Adjustable Power Supply with Charger Output
• Adjustable Strobe Light
• Alarm Power Supply
• AM Receiver
• AM Transmitter
• Amp with Tone Controls & Soft Switching
• An Add-on Current Limiter
• Antenna Tuning Unit
• Asymmetric Timer
• Audio Indicator
• Audio Level Meter
• Audio Line Driver
• Audio Notch Meter
• Audio Perimeter Monitor
• Audio VU Meter
• Automatic Retransmitting Makeshift Repeater
• Band 2 Preamplifier
• Basic UPS Power Supply
• Beat Balance Metal Detector
• Bench Amplifier
• Bipolar Regenerative Reciver
• Buffer Amplifier
• Class-A-AB Amplifier
• Coil Coupled Operation Metal Detector
• Combinational Conjuring Trick
• Complete Radio Set with MK484 and Loudspeaker
• Computer Microphone
• Conjuring Trick
• Connection Tester
• Current Limiting Power Supply
• Dark Activated Switch
• DC Motor Control Circuit
• DC Motor Reversing Circuit
• Decimal to BCD Convertor
• Digital Combination Lock
• Doorbell for the Deaf
• Doorphone Intercom
• Dual Regulated Power Supply
• Dynamic Microphone Preamp
• ECM Mic Preamplifier
• Electromagnetic Field Probe with Meter Output
• Electronic Doorbell with Counter
• Electronic Keypad
• Electronic Night Light
• Fast Electronic Fuse
• Field Strength Meter
• FM Receiver
• FM Transmitter
• FM Transmitter Circuit
• FM Transmitter from David Sayles
• Frost Alarm
• Function Generator
• Fuse Blown Indicator
• Headphone Amplifier
• Hi-Fi Preamplifier
• Hot Water Level Indicator
• Increasing Regulator Current
• Infra Red Switch
• Infra Red TV Remote Control Extender
• Insect Repellant
• IR Link
• IR Link
• IR Remote Control Modulation Detector
• IR Remote Control Tester
• L200 Power Supply
• Laser Communication System
• LED Flasher
• LED flasher 2
• LED Torch
• LED Torch
• Light Detector Circuit
• LM317 Regulator Circuit
• Logic Probe
• Logic PSU with Overvoltage Protection
• Low Voltage Preamplifier
• Low-Frequency Crystal Controlled Oscillator
• Magic Wand Conjuring Trick
• Magnetic Gun
• Medium Wave Active Antenna
• Metal Detector
• MILLIGAUSS METER
• Model rocket launch controller
• Monitor Splitter
• Multi Rocket Launcher
• Multi Wire Cable Tester
• NE555 Basic Monostable
• Neon Desklamp
• Nicad Battery Charger
• Op-Amp Microphone Preamp
• Overvoltage Protection for the LM317
• PBS Switch Debouncing Circuit
• PC Output Interface
• Peak Reading Audio Level Meter
• Periodic Timer
• Phone Hold With Music
• Phone line indicator
• Pot Plant Power
• Q- Multiplying Loop Antenna
• Quadraphonic Amplifier
• Quiz Circuit
• R5000 Computer Interface
• Rectification using a Gyrator Circuit
• Regulated 12 Volt Supply
• Remote Doorbell Warning Switch
• Repeating Interval Timer
• Repeating Timer No.2
• Room Monitor
• Sensitive DX TRF Receiver
• Short Wave Regenerative Reciver
• Signal Tracer and Injector
• Simple Field Strength Meter
• Sine Wave Generator
• Small Variable Power Supply
• Soft Musical Telephone Ringer
• Soft Start PSU
• Sound Operated Switch
• Speaker Microphone Circuit
• Sqaure Wave Oscillator
• Static Electricity Negative Ion Detector
• Supply Voltage Indicator
• Surveillance Transmitter Detector
• SW Receiver Using MK414
• SW RF Pre-Amplifier
• Telephone amplifier
• Telephone In-Use Indicator
• Telephone line monitor
• Temperature Monitor
• The ATL-3 Loop Antenna
• The GEM Class-A-AB Amplifier
• The Output Adjustable Flyback Converter
• Tone Control Circuit
• Transformerless Power Supply
• Triac Based Light Controller
• TV Transmitter
• Two Simple Crystal Test Circuits
• UHF Preamplifier
• Ultrasonic Dog Whistle
• Universal DC-DC Convertor
• Universal PSU
• Unregulated Power Supply
• Variable Power Supply
• Variable Power Supply Using Fixed Regulator
• Variable Voltage Regulation
• Vinyl Pre-Amplifier
• Voice-Over Circuit
• Voltage Comparator Switch
• Wart Zapper
• Water Activated Relay
• Zener Diode Tester
• ZN414 Portable Receiver