Knock knock

A single supply non-inverting amp with pulse stretcher. It's also got an offset 'knob'. The LM2940 is a dual amp, so maybe I'll add some more pulse shaping. It sucks that all the easy stuff requires symmetric supply voltages. But using just 5V also means that there won't be any over-voltage or negative voltages that could kill the AVR.

The blue curve will be integrated by a microcontroller.