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BackTo U3-3 = capacitor measurement roughly 15nF (has a resistor limiting max drone frequency:
re-re-remove the mysterious extra trace re-re-remove the mysterious extra trace .../Unseen Servant/Unseen Servant.kicad_pcb | 2 | 1N5817 | Schottky diode | | | R24, R26, R28 | 3 | A1M | Potentiometer | | | R5, R29 | 3 | 10uF | Polarized capacitor | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 | 4 | | | J2 | 1 | SW_SPDT | Switch, single pole double throw, separate symbols | | | | Taydaa | A-4755 | | Tayda | A-2939 | | R17, R19 | 3 | 1k | Resistor | | Tayda | A-826 | | Tayda | A-4755 | | | Q1, Q2, Q3 | 3 | 4.7k | Resistor | | J7, J8, J9 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | ----- | --- | ---- | ---- | ----------- | ---- | ---- | ---- | ----------- | ---- | ----------- | ---- | ----------- | ---- | | | | S3 | 1 | TL074 | Quad operational amplifier, DIP-14"/>