Category Archives: Circuits and Electronics

New 12v Fan Controller

This is my latest fan controller, based off a LM317 regulator.  It can be adjusted from fan turn on at 64F and max speed at 131F up to turn on at 104F and max speed at 167F.

Posted in Circuits and Electronics, Ideas | Comments Off on New 12v Fan Controller

Fan Controller

This is a fan controller I worked on, based on the Temperature Controlled Fan I found online. In this version, R1 is a 10K NTC thermistor (shown in schematic at 20C, which is 12.5k).  Adjust R2 for the turn on … Continue reading

Posted in Circuits and Electronics, Ideas | Comments Off on Fan Controller

Neat little water detection circuit

While in college I lived in an apartment building that the basement always flooded.  Sometimes the sump would take care of it, other times not so much.  Since I’m a nice guy I was constantly checking the basement during wet … Continue reading

Posted in Circuits and Electronics | Comments Off on Neat little water detection circuit