| Small electronic siren |
Siren with two NE555. |
2.86 |
3,892 |
| Small electronic siren v2 |
Small electronic siren with NE562. |
2.89 |
2,145 |
| Stereo amplifier |
Stereo audio amplifier with ULN2274B. |
2.90 |
2,840 |
| Stereo coder |
Stereo coder. |
2.83 |
1,490 |
| Stereo coder - multiplexer |
This stereo coder is suitable for FM transmitters if you wish to transmitt stereo audio. |
2.89 |
2,122 |
| Tremolo effect |
Tremolo audio effect. |
2.84 |
1,226 |
| Two tone siren at 1.5V |
Nice little siren operating at 1.5V. |
2.88 |
2,398 |
| Two tone siren v1 |
Two tone siren using two NE555 ICs. |
2.89 |
1,346 |
| Two tone siren v2 |
Two-tone siren with CMOS IC 40106. |
2.84 |
1,251 |
| Two tone siren v3 |
Two tone siren using two NE555 timer ICs. |
2.99 |
2,272 |
| Two transistor audio amplifier |
Two transistor audio amplifier. |
2.82 |
3,250 |
| Ultrasonic generator |
Generates audio signal from 12 to 50 kHz. |
2.88 |
1,497 |
| Ultrasonic receiver |
Ultrasonic audio receiver. |
2.92 |
1,347 |
| Underwater microphone |
Underwater microphone with TBA820M. |
2.84 |
1,194 |
| VU-meter with 6 LED diodes |
VU meter with 6 LED diodes with no power supply. |
2.87 |
3,373 |
