Phrazemaster
Well-known member
Hi, I'm adding an illuminated switch to a green pre, and I was going to use a dpdt switch to drive a relay and an incandescent lamp: one pole of the switch for the lamp, one for the relay. Easy, right?
So I ran across another post somewhere where the person said, why not drive the lamp and relay with the same circuit; if you can drive the relay coil then you also drive the lamp too.
That means I could just use a SPST switch (saving money) and also simplify the design (2 perks!).
So, is this wise? If doable, then would I wire the lamp and Relay in series or parallel, and do I need to worry about coil kickback damaging the lamp?
I'm sure this is tepidly basic electronics, but you know what? I'm a total newbie. Not sure how to proceed.
I was thinking then I should get a 5v incandescent lamp and a 5v relay (makes sense, right?) to drive them both at the same time. I'm assuming I would need to put a diode across the relay contacts, but again how would this interface with the lamp? Anyone willing to give advice/draw a small schematic?
Thanks in advance for the help.
Mike
So I ran across another post somewhere where the person said, why not drive the lamp and relay with the same circuit; if you can drive the relay coil then you also drive the lamp too.
That means I could just use a SPST switch (saving money) and also simplify the design (2 perks!).
So, is this wise? If doable, then would I wire the lamp and Relay in series or parallel, and do I need to worry about coil kickback damaging the lamp?
I'm sure this is tepidly basic electronics, but you know what? I'm a total newbie. Not sure how to proceed.
I was thinking then I should get a 5v incandescent lamp and a 5v relay (makes sense, right?) to drive them both at the same time. I'm assuming I would need to put a diode across the relay contacts, but again how would this interface with the lamp? Anyone willing to give advice/draw a small schematic?
Thanks in advance for the help.
Mike