| Dark switch |
Dark switch with thirystor. |
2.93 |
2,247 |
| Event counter |
Event counter with 7 segment display. |
2.89 |
2,209 |
| Electronic dice v2 |
Much simpler electronic dice circuit. |
2.89 |
2,123 |
| Voltage level change detector |
Sensivity is in mV. |
2.90 |
1,988 |
| Zero crossing detector |
Detect when ~ signal is zero. |
2.93 |
1,982 |
| Geiger counter v1 |
Beta and Gamma ray detector with a neon-tube. |
2.87 |
1,960 |
| Sound/light effect for toys |
Detects light and generates sound effects for toys. |
2.95 |
1,939 |
| DTMF decoding and generation |
Generating and decofing DTMF tones with two ICs. |
2.88 |
1,930 |
| Signal generator |
Device that generates signal based on RC values. |
2.92 |
1,912 |
| RDS decoder |
RDS signal decoder. |
2.96 |
1,866 |
| LED signal level display |
Device uses MAX924 IC. |
2.93 |
1,773 |
| Static charge detector |
Detects static charge and IONs. |
2.96 |
1,757 |
| Electric line tester |
Electric line tester with sound alarm. |
2.90 |
1,695 |
| PC monitor radiation measurement |
This device measures PC's monitor radiation according to MPR-II and MPR-III standard. |
2.94 |
1,651 |
| Geiger counter v3 |
Very good Geiger counter. It uses GM tube. |
2.94 |
1,579 |
