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License information ## Contribution License Agreement If you want to socket the timing capacitors. ** Use only four (4) potentiometers, either 9 mm or 16 mm vertical board mount OR: | | | S2 | 1 | LED | Light emitting diode | | | Tayda | A-1531 or A-557 | | | | | | R109, R111, R113 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 | 4 README.md | 8 | 1N4148 | 100V 0.15A standard switching diode, DO-35"/>