Melody generator (CB9207E)

Found in an Elektor from the 90s, this circuit is based on components that are still common today. Power is supplied with only two batteries.

| Clique na imagem para ampliar |

12 V Monitor (CB859E)
If the input voltage falls below 12 V the LED glows up. Other voltages can be monitored by...
ON Semconductor FFSP0665B 650V 6A SiC Schottky Diodes
ON Semconductor FFSP0665B 650V 6A SiC Schottky Diodes Available through Mouser Electronics, these...
200 nA constant current source (CB8243E)
This adjustable circuit from 0 to 200 nA was found in a 90's EDN. The components can still be...