R18, R26 | 3 | A1M | \*\*Potentiometer, 16 mm 3.5 mm jack 3 mm LED 5 mm Small Signal NPN Transistor, TO-92"/> Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14Operational amplifier, DIP-8Quad operational amplifier, DIP-14"/>
10/18] More tweaks after pro.