It´s a modern approach of the possibly most popular bass drum in electronic music scene.
I´ve been following the original schematics to get the closest result.
As you might remember, there is no tuning knob in the original one. It‘s fixed to 56Hz.
This version goes from 42Hz to 127Hz
12V – 11mA
-12V – 12mA
Note: This module also exists as assembled and DIY-THT project. If you got a THT one it´s probably not assembled by me!