Transistor "latch" circuit?

[Anonymous]

Anyone know of a simple transistor circuit to be used in place of a latching relay, to indicate the position of a turnout, and thus turning on an LED. That is, the momentary switch for the turnout activates a "continous on" for the LED. Hopefully, it's less expensive than a latching relay. I'm wondering if I explained this very well!

[Anonymous]

Anyone know of a simple transistor circuit to be used in place of a latching relay, to indicate the position of a turnout, and thus turning on an LED. That is, the momentary switch for the turnout activates a "continous on" for the LED. Hopefully, it's less expensive than a latching relay. I'm wondering if I explained this very well!

[bluepuma]

Need to try the modeling forums. Cheapest/easiest will use two NOR gates wired as a set/reset flip-flop. Another circuit is a SCR, once triggered by a signal on the gate, it conducts until the circuit is broken by a momentary contact.

We used to have electronics circuits in Model RR mag, someone might know a back issue of that or similar, of hobby electronics circuits.

[bluepuma]

Need to try the modeling forums. Cheapest/easiest will use two NOR gates wired as a set/reset flip-flop. Another circuit is a SCR, once triggered by a signal on the gate, it conducts until the circuit is broken by a momentary contact.

We used to have electronics circuits in Model RR mag, someone might know a back issue of that or similar, of hobby electronics circuits.

[Anonymous]

Hi, Jim

I'm looking for the same circuit. Did you find something since this time?

Thanks

[Anonymous]

Hi, Jim

I'm looking for the same circuit. Did you find something since this time?

Thanks