Institute Newton C. Braga

Circuit Bench

Pacemaker (CB7372E)
This circuit is from 1968 American medical documentation. The circuit generates pulses of...
Phototransistor triggering a Reed Relay (CB11213E)
The circuit we showed was obtained from our publication on relays and makes use of any...
Two Tone Siren 555 (CB17575E)
This siren configuration using the 555 has already been explored in other circuits on this site. In...