Part="LM2904"> Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | | | | Tayda | A-159 | | L1 | 1 | B10k | \*\*Potentiometer, 9 mm vertical board mount. Only 16 mm vertical pots. You can even use a ground plane. - when pressed, short +12V and Reset In Pause CV In - U1-13 (can get at from top when assembled Stop Switch - 10 ohms between U1-14 and U2-1 when off.