| Ref | Value | size/footprint | Mouser part no |
|---|---|---|---|
| U1 | MAX4624 | SOT-23-6 | 700-MAX4624EUTT |
| U2 | ATTINY25, ATTINY45 or ATTINY85 | SOIC8 | 556-ATTINY85-20SU |
| R1,R2,R3 | 1K | 0603 | 603-RC0603FR-071KL |
| R4,R5 | 100K | 0603 | 603-RC0603FR-07100KL |
| R6,R7 | 560-1K | 0603 | 603-RC0603FR-071KL |
| R8 | 30 | 0603 | 603-RC0603FR-0730RL |
| R9 | 10K | 0603 | 603-RC0603FR-0710KL |
| C1, C3 | 100n | 0603 | 710-885012105016 |
| C2 | 10n | 0603 | 710-885012206014 |
| C4 | 10uf | 0603 | 710-885012106006 |
| D1,D2 | LED | 0805 | 710-150080GS75000 |
| D3 | B5819WS (or any) | SOD-323 | 833-B5819WS-TP |
| Button | 6mm X 7.3mm | https://www.banggood.com/50Pcs-2x4x3_5mm-Tact-Tactile-Push-Button-Switch-SMD-Surface-Mount-Momentary-p-1007736.html |
Looks like U1 can be replaced with STG719 if MAX4624 is not available. This is not tested, but footprint is 1 to 1. The resistance is different (4 instead of 1 Ohm).