MikeML was very nice to post this shunt regulator for me. Can someone please tell me tje purpose of R1?
A guess is that it limits the date current on the FET but it being tied to the cathode of the TL431 confuses me a bit, unless it is also limiting the current there too.
The reason I ask is that I do not have any 470 ohm resistors. I have a couple of 240 ohm resistors. Will they do?
Looks like the Shack carries 470. Hopefully they have them locally but it would be nice to know if I have other options.
A guess is that it limits the date current on the FET but it being tied to the cathode of the TL431 confuses me a bit, unless it is also limiting the current there too.
The reason I ask is that I do not have any 470 ohm resistors. I have a couple of 240 ohm resistors. Will they do?
Looks like the Shack carries 470. Hopefully they have them locally but it would be nice to know if I have other options.
Last edited: