will circuit overheat?

[T3tone]

I have just made up the diode circuit (2x 1n4004 and 15v zener) to run my rev counter and wondered if the components will be ok in heat shrink? I have no idea if any of the above components get hot and i need to make up the circuit another way? Just for confirmation im running a small TIM rev counter that used to connect to the negative coil terminal so assume i need the diode circuit?

Many thanks.

[Gilesy998]

I'm glad someone else asked, because I'm planning on potting mine in a little box. I don't think they'd get particularly warm, but it's best to know first isn't it?

[brentp]

I'm running this exact circuit, without heat issues. In fact, I have it heat-shrinked in line with the wires going to the coil pack.

[T3tone]

Thanks Brent glad to hear that,i too have them heat shrinked in line with the coil wires, it runs my rev counter very nicely.