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Sumqz
| Reference | Value | Description |
|---|---|---|
| U1,U3 | MCP23017_SP | 16-bit I/O expander, I2C, interrupts, w pull-ups, SPDIP-28 |
| BZ1,BZ2 | Buzzer | Buzzer, polarized |
| C1,C2 | 100nF c.Cap. | Unpolarized capacitor |
| D1-D84,D86-D88 | D | Diode |
| R1,R2,R5,R6 | 4.7K | Resistor |
| R3,R7 | 806K | Resistor |
| R4,R8 | 2M | Resistor |
| SW1-SW87 | SW_Push | Push button switch, generic, two pins |
| TP1-TP4 | TestPoint | test point |