| Lie detector v1 |
Very simple lie detector. |
2.90 |
5,573 |
| Electric line tester |
Electric line tester with sound alarm. |
2.90 |
1,685 |
| Touch switch |
Simple touch switch circuit. |
2.90 |
4,193 |
| Heat detector using NE555 and diode |
Heat detector using NE555 and a diode. |
2.90 |
3,577 |
| Metal seeker |
Metal seeker. |
2.89 |
3,721 |
| Voltage level change detector |
Sensivity is in mV. |
2.89 |
1,981 |
| CNC driver |
The simplest unipolar motor driver. |
2.89 |
4,473 |
| Generation of square wave signals |
Generation of square wave signals with NE555 (blinking an LED) - 4 schematics. |
2.89 |
1,422 |
| Geiger counter v2 |
Geiger coutner with GM tube. |
2.89 |
1,120 |
| Event counter |
Event counter with 7 segment display. |
2.89 |
2,203 |
| Tilt switch |
Tilt switch like in pinball machine, using NE555. |
2.89 |
1,004 |
| DTMF decoding and generation |
Generating and decofing DTMF tones with two ICs. |
2.89 |
1,925 |
| Darkness detector |
Darkness detector with photo resistor and NE555. |
2.89 |
2,763 |
| Electronic thermostat |
Elektronski termostat with a diode. |
2.89 |
5,650 |
| TV RF signal amplifier |
TV RF signal amplifier. |
2.88 |
2,408 |
