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(could normal to TP10, optional 2x Toggle Switches, 2pin: all step switches (all go to same bus) - run/stop 2x Pushbutton switches, all 2pin: - all step switches (all go to 10 nF | Unpolarized capacitor | | | R25, R27, R29 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 KK254 Molex header 2.54 mm spacing Q1, Q2, Q3 | 3 | 100R | Resistor | | | Tayda | A-1624 or A-2969 | | Q1, Q2, Q3, Q4, Q5 | 5 | 2N3904.

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