| Megaphone at 9V |
Amplifier for megaphone operating at 9V. |
2.89 |
1,717 |
| IR audio receiver |
Receiver for IR audio modulated signal. |
2.88 |
1,688 |
| Noise generator |
Noise generator using zener diode. |
2.91 |
1,614 |
| Ultrasonic generator |
Generates audio signal from 12 to 50 kHz. |
2.88 |
1,494 |
| Stereo coder |
Stereo coder. |
2.83 |
1,489 |
| Amplifier with TDA738x chip |
Circuit for Car-CD final stage TDA7382 / 83 / 84A / 85 / 86. |
2.82 |
1,447 |
| Ultrasonic receiver |
Ultrasonic audio receiver. |
2.92 |
1,346 |
| Two tone siren v1 |
Two tone siren using two NE555 ICs. |
2.89 |
1,343 |
| Audio message recorder |
Audio message recorder using Information Storage Device - ISD integrated circuit. |
2.91 |
1,330 |
| Two tone siren v2 |
Two-tone siren with CMOS IC 40106. |
2.84 |
1,249 |
| Tremolo effect |
Tremolo audio effect. |
2.84 |
1,224 |
| Morse code practice keyer v1 |
Simple Morse-code practice oscillator. |
2.84 |
1,200 |
| Underwater microphone |
Underwater microphone with TBA820M. |
2.84 |
1,192 |
| RIAA phono amplifier |
RIAA phono amplifier for amplification of signal picked-up with a crystal. |
2.89 |
1,066 |
| Metronome v1 |
Metronome, tick-tick. |
2.87 |
1,066 |
