Labels Milestones
BackA-3489, or A-3499\*\*\* | | | | | | | U2 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x10 Pin socket, 2.54 mm, 1x2 (see [build notes](build.md | | | | C10 | 1 nF | Unpolarized capacitor | | | | | U3 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14