The Nonlinear Circuits Thread


The first time I plugged in my NUMBERWANG module it started to smoke!

I turned off the power very quickly and plugged the module in correctly.

It seems to work as advertised, but, is that even possible after seeing the smoke!?

Sometimes it’s difficult to tell when NLC modules are behaving optimally so thought I’d check in.



Yeah, the older designs by Andrew (until maybe mid 2017) used 10r resistors as circuit protection. Kind of a poor man’s slow blow fuse. So if you saw smoke, typically it was them burning to save the module. Luckily you’ve saved it in time, but if it happens again or fails for some reason, check the 2 10r resistors either side of the power connector.


Thanks much. Appreciate the response + feeling lucky!


Is there a list anywhere of which NLC modules are entirely thru-hole? I’d like to DIY a few of them but not ready for SMT yet!


Up to 41 should all be Thru hole, I’ll see if i can find a better list though.


I couldn’t find a better list, but that should get you started.

When you are ready for SMD, Bong0 is the one to do. Fun, and only like 25 components.