E)
This circuit uses a reversible double contact relay to obtain the trigger lock with the unijunction pulse. The relay must be of the sensitive type with at least 150 ohms of coil.
The illustrated circuit uses the AUIRS2301 S from International Recfifier (www.irf.com) and is...
This timer was found in English documentation from the 80's. The integrated circuit is common...
This circuit is from an Electronic Design of the 90's. The circuit can be implemented with more...