Hi,
Bit of a dumb question here.....
Not having much luck with circuits triggering SCR's. What I want to do is trigger an SCR, and I know they require a short burst of current. Triggering them manually with a wire works fine.
Trouble is, how do I get another circuit to trigger it momentarily? e.g. Let's just say I have a 555 timer IC (another circuit), and I want its
555 output pin to trigger the SCR, even if the 555 timer output changes back to 'low' again. The SCR must remain on until power is turned off to the actual SCR, even if later the 555 was switched off completely. This is just an example.I thought a non-elec cap and a high value resistor would work (providing a pulse), but it didn't affect the SCR at all.. not sure if its due to the type of SCR I'm using or not. If I manually trigger the SCR with a lead, it works fine, so its not a connection problem. The SCR I'm using is a C106Y and have also tried a BT169D (from Jaycar)..
This is what I tried, assuming would work:
PWR----||----+-----> To SCR gate
10n | (pulse) | _| |
| | 10M
- | |GND
I know about the electromagnetic induction method, and that a 555 can be configured to work like an SCR, but isn't there a much quicker better way, similar to the above?
Thanks in advance.