Latching relays - 12v dc vs 5v dc?

[TT-Pete]

Hello All,

 

I have a quantity of Siemens dual coil latching relays that I want to use for switching input polarity on Peco point frogs;

 

 

They are rated for 5v dc with coil sensitivity of 200m W, I suspect that the 12v dc output from the transformer will be too much for them (?) not knowing much about electronics, can anyone suggest how I can step the voltage down to 5v?

 

Thanks,

Peter.

 

[cliff park]

I reckon 150Ω, ½ Watt resistor would do it. If you have loads of the relays you could always wire 2 in series, I'm sure they would be ok on 6V, and you would have some spare contacts.....indicator lights on the control panel?

[nick_bastable]

ready made units on that site readily available for <£5  

 

or this circuit for pennies

 

https://www.circuitlab.com/circuit/cy7x33/screenshot/540x405/

 

 

Nick B

 

Edited June 27, 2023 by nick_bastable