This circuit can be used to generate percussion sounds such as bell, triangle, etc. The circuit must be powered by symmetrical source and the triggering is by external pulse.
This circuit uses a photocell as sensor and a sensitive relay according the power supply voltage....
This 2005 circuit from a Linear Technology manual makes use of the LTC610HV and an optical coupler that...
The 4093 or any other NAND gate can be used for the very sensitive configuration of a R-S...