Diac Implemented with 2 Diodes

228

02:51:42

The two diodes are connected back-to-back to simulate a diac (the diac device is not available on everycircuit). 
The current through the 10 Ohm load resistor shows the positive and negative half-cycle current spikes similar to those produced in diac circuits. 
These 'spikes' can be used to trigger devices such as the Thyristor.
By adjusting the values of the 6 Ohm resistor and the 300uF capacitor the  'diac' spike angle can be adjusted.

Waveforms:

Orange = AC supply Voltage
Blue = Phase Shifted 'Diac' Voltage
Green = 'Diac' output current

published 7 years ago

hurz

7 years ago

Here a DIAC model which is a little more complicated then just two diodes http://everycircuit.com/circuit/6152860550299648

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