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Type="output"/> Dual Operational Amplifiers, DIP-14/SOIC-14 | | | | J3, J4, J5 | 3 | 4.7k | Resistor | | | C2 | 1 | LED | Light emitting diode | | | | | | R3, R21, R27, R28 R4, R6, R7, R30, R31 | 5 If we expect or plan on developing modules which use the 4 pins (http://www.qingpu-electronics.com/en/products/WQP-PJ320E-177.html PJ31060-I 6pin SMD 3.5mm headphones jack plug stereo 3.5mm PJ311 Headphones with microphone connector, 3.5mm, 4 pins for trigger.

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