With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can be used, and the SCR supports an equivalent. The circuit is from the 1977 RC semiconductor manual.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
September 2016 - Mouser Electronics is offering the new oscillator clock PECL series PE55K of the...
This circuit, with magnetic sensor, uses an operational amplifier of the time. The circuit is from...