Ok, Update. I focused too much on the resistor values. It appears my problem now is the piezo transducer. With out the transducer the circuit now works fine. It seems I'm getting a very small (9mV) voltage but this is enough to trigger the gate.
@Minder The gate resistor started at 330Ω but dropped it to 130Ω. I'm tying down the gate to 0v with 630kΩ and the led has 330Ω
Currently I only have two thyristors in an attempt to understand this better and eliminate other issues.
I have tried the suggestions. Thanks. The results are very similar to before. However now, once the first thyristor latches, the second thyristor would latch but the first would switch off. I'll keep trying with the resistor values.
Hi,
I wanted to build what I thought was going to be a quick circuit for my kids using thyristors and transducers. The project idea was to create a target for them to fire their Nerf bullets at, the transducers would be part of the target acting as a pressure switch and the thyristor would be...