Overprotective Parent (I'm 18 & Moving Out)

 Exact same circuit as the original but with the added onboard charge pump. Circuit will prevent damage from over voltage and is resettable/reusable over and over again. Refer to the original for more information. 

Overprotective Parent

 This is one of the coolest circuits I've been able to wrap my head around. An overvoltage and polarity  protection circuit that wont require the any parts to be changed or re-soldered due to misuse. The only pedals I've had to fix for people were broken because their "friend" accidentally plugged in the wrong power supply and fried some internal components. This little circuit will prevent those parts from getting fried, and will also save the hassle of having to repair it. What is commonly referred to as a 'crowbar circuit', it baffles me that this isn't more commonly implemented. 

12v Tripler

This circuit takes 12v+ on the input and gives you almost 36v+ at the output. Some of the tube circuits I've been playing with require running the heater at higher voltages so having this laying around has been pretty handy for experimenting with "headrooms".