Free electronic projects and hobby circuits
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| AUDIO | GAMES |
| Active Tone Controls | Heads or Tails |
| Audio Oscillators | Magic Candle |
| Audio Power Amplifiers | One Armed Bandit |
| Audio Preamplifiers | Quiz Monitor |
| Cassette Preamplifier | Reaction Game |
| Cassette Radio Booster | |
| Class A Amplifier | HOUSE AND HOME |
| Clipping Monitor | Christmas Tree Lights Flasher |
| General Purpose Amplifier | Doorbuzzer (1) |
| Headphone Amplifier | Doorbuzzer (2) |
| Hum Notch Filter | Egg Timer |
| LED VU Meter | Home Intercom |
| Peak Level Indicator | Table Lamp |
| Peak Limiter | |
| Peak Reading VU Meter | INDICATORS AND ALARMS |
| Power Amplifier | Car Battery Alarm |
| Preamp with dB-Stepped Gain Control | Infra-Red Intruder Alarm |
| Remote and Touch Volume Controls | Low Battery Voltage Indicator |
| RIAA Stereo Preamplifier | Light Change Detector |
| Scratch and Rumble Filter | LED Flasher |
| Simple Amplifier | Low-Power LED Flasher |
| Simple Preamplifier | Opto-Thermo Alarm |
| Six Watt Siren | Two Tone Alarm |
| Stereo Synthesizer | Water Alarm |
| Telephone Amplifier | |
| Treble Booster | MISCELLANEOUS |
| VMOS 10 Watt Amplifier | Electronic Thermometer |
| Insect Repellent | |
| CLOCKS & OSCILLATORS | Precision Half-Wave Rectifier |
| 8038 Signal Generator | |
| HF TTL Clock | MUSIC AND DISCO |
| Low Frequency Oscillator | Audio Limiter |
| Op-Amp Oscillator (1) | Auto Waa |
| Op-Amp Oscillator (2) | Automatic Fader |
| Phase Shift Oscillator | CA3080 VGA |
| Opto-Tone | Clipping Amplifier |
| Reverberation Unit | Guitar Practice Amplifier |
| Single IC Organ | Metronome (1) |
| Speech Processor | Metronome (2) |
| Sustain Unit | Noise Gate |
| Tremolo Unit | Noise Source |
| Two Microphone Preamplifiers | Crystal Calibrator |
| Voice Operated Fader | Crystal Set |
| Voltage Controlled Filter | FET TRF Receiver |
| Voltage Controlled Oscillators | I.F. Alignment Oscillator |
| Waa Waa | Medium Frequency Amplifier |
| Simple MW Radio | Morse Practice Oscillator |
| Simple SW Radio | Radio 4 Tuner |
| Two Transistor Radio | Short Wave Converter |
| PHOTOGRAPHY | TIMING AND SEQUENCE |
| Flash Slave Unit (1) | 555 IC Timer |
| Flash Slave Unit (2) | CMOS Monostable |
| Simple Photo Timer | D.M.M. To Stopclock Converter |
| Slide/Tape Synchroniser | LED Chaser |
| Sound Triggered Flash (1) | Simple Timer |
| Sound Triggered Flash (2) | ZN1034E Timer |
| POWER CONTROL | SWITCHES |
| 12V DC Motor Speed Controller | Combination Lock |
| Fast Fuse | Differential Temperature Switch |
| Mains Interference Suppression | Light Sensitive Switch |
| Nicad Charger | Opto-Thermo Switch |
| Nicad Current Generator | Touch Switch |
| Overload Current Trip | |
| Thermostat | RADIO |
| Thyristor Switching | 10-30MHz Preselector |
| Two-Down-One | 27MHz Radio Control Monitor |
| 144MHz Converter | |
| POWER SUPPLIES | Bedside Radio |
| 5-13V Power Supply | |
| Car Cassette Power Supply Power | TEST GEAR |
| Supply With IC Regulator Regulator | AC Meter Booster |
| Booster | Active’Scope Probe |
| Regulated Power Supply | AF Millivolt Meter |
| Simple Voltage Regulator | AF Signal Generator |
| Single IC Power Supply | CMOS Logic Probe |
| Supply Splitter | Continuity Tester |
| Unregulated Power Supply | Diode-Transistor Tester |
| Direct Reading Ohmmeter | |
| TESTING CIRCUITS | FET Voltmeter |
| Signal Injector-Tracer | Field Strength Meter |
| Suppressor Tester | Linear Scale Resistance Meter |
| Transistor Checker | Measuring Capacitance |
| Transistor Tester (1) | Nanoamp Meter |
| Transistor Tester (2) | Zener Diode Tester |
free control rgb led
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