Ultra-precise long time delay relay

  

Posted on Jun 1, 2012    11218

Predictable time delays from as low as 0 milliseconds to over 3 minutes are obtainable without resorting to a large value electrolytic-type timing capacitor


Ultra-precise long time delay relay - schematic

Instead, a stable low leakage paper or mylar capacitor is used and the peak point current of the timing UJT (Ql) is effectively reduced, so that a large value emitter resistor (Rl) may be substituted.




Leave Comment

characters left:

New Circuits

.