Alternating tone siren 555 (CB9202E)

Found in Radio Electronics from the 90s, this siren finds many variations on this site. The transistor must be equipped with a heat radiator.

| Clique na imagem para ampliar |

Integrator 741 (CB16815E)
This is one of the many integrated integrator circuits that the reader can find on the website. The...
MCP1810 LDO with Ultra Low Quiescent Current (COM144E)
November 2016 - Mouser Electronics already has the new Microchip MCP1810 Low Dropout (LDO)...
Germanium Transistors Astable (CB14769E)
This circuit is from Mullard's transistor reference manual from 1960. The circuit will also work...