9v Silent Switching Daughterboard conversion to 5volt?

[bigzed900]

Hi Everyone,

Can the 9volt Silent Switching Daughterboard by IvIark be converted to operate a 4.5 or 5 volt latching relay?

Cheers
Bill

[Travis]

An easy way to get 5V from a different supply is to use a 78L05. Connect 9V to "I", ground to "G", and "O" is your regulated 5V output which can supply the relay it's 5V.

[bigzed900]

Hi Travis, yeah I've done that funny enough but the relay won't operate and I'm wondering if the switching circuit needs a tweak too! The relay works in the  40106 CMOS circuit using a 2n3904 and 2N3906 and the trouble is with this design if the voltage drops below 9 by just .1 of a volt it doesn't work so no good for battery operations, thats why I like this circuit it's by far the best one. I've breadboarded so I will plod on and try some different trannies!

Anyway thanks for your reply
Cheers
Bill

[bigzed900]

Works fine now