Hi,
I'm building a 12V circuit which uses a momentary switch to toggle a latching relay. Thus far it's working just fine, but I've noticed that when I close the momentary switch to toggle the relay, the circuit starts to draw a fair bit of current, maxing out at about 1.5A. The relay coil doesn't need anywhere near this much current to trigger, and I can limit the power supply's current output down to about 20ma and still trigger the relay.
The problem is that the momentary switch's contacts are only rated to 50ma, and I'm worried that I'll burn them out prematurely given the amperage that's flowing.
I need the full 12V to get the relay to trigger, so I can't solve this with a resistor. Can anyone point me in the direction of a simple circuit that will cap the current flowing through the relay coil at 30 or 40ma?
Thanks!
-Ben
I'm building a 12V circuit which uses a momentary switch to toggle a latching relay. Thus far it's working just fine, but I've noticed that when I close the momentary switch to toggle the relay, the circuit starts to draw a fair bit of current, maxing out at about 1.5A. The relay coil doesn't need anywhere near this much current to trigger, and I can limit the power supply's current output down to about 20ma and still trigger the relay.
The problem is that the momentary switch's contacts are only rated to 50ma, and I'm worried that I'll burn them out prematurely given the amperage that's flowing.
I need the full 12V to get the relay to trigger, so I can't solve this with a resistor. Can anyone point me in the direction of a simple circuit that will cap the current flowing through the relay coil at 30 or 40ma?
Thanks!
-Ben