| Two tone siren at 1.5V |
Nice little siren operating at 1.5V. |
2.88 |
2,398 |
| Audio mixer |
Audio mixer with 3 channels. |
2.88 |
4,573 |
| LM3886 single chip 68W amplifier |
LM3886 single chip 68w amplifier. |
2.88 |
2,341 |
| Electronic whistle |
Electronic whistle using any OpAmp. |
2.88 |
2,207 |
| Electronic stethoscope |
Schematics for electronic stethoscope. |
2.87 |
2,025 |
| M250 audio amplifier |
Audio amplifier with 4x MJ15024 and 4x MJ15025. |
2.87 |
3,257 |
| Metronome v1 |
Metronome, tick-tick. |
2.87 |
1,066 |
| VU-meter with 6 LED diodes |
VU meter with 6 LED diodes with no power supply. |
2.87 |
3,371 |
| FSK demodulator with MC13155 |
FSK demodulator with MC13155. |
2.86 |
905 |
| Small electronic siren |
Siren with two NE555. |
2.86 |
3,888 |
| LED blinker with audio indication |
Circuit that blinks LED and beeps at the same time. |
2.86 |
4,154 |
| Metronome v3 |
Another version of metronom with NE555. |
2.86 |
983 |
| Audio amplifier 1.5W |
Audio amplifier 1.5W at 12V. |
2.86 |
3,724 |
| Audio communication over mains 220V |
Audio communicator over mains power network - 220V. |
2.86 |
8,434 |
| VU-meter with gauge |
Analog VU-meter. |
2.85 |
2,948 |
