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| ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | | R24, R26, R28 | 3 | 100R | Resistor | | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x10 Pin socket, 2.54 mm, 1x7 | | Tayda | A-3186 | | | | | R25, R27, R29 | 3 | A1M | Potentiometer | | | | | | J12 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8 Audio Jack, 2 Poles (Mono / TS) | | | Tayda | A-553 | | | | S3 | 1 | 10nF | Unpolarized capacitor | | Tayda | A-553 | | | | | | | | Screws and spacers (see build notes The build is pretty straightforward except for mechanical assembly, and one with an eye towards doing it all in one module with integral chip antenna (http://ww1.microchip.com/downloads/en/DeviceDoc/60001380C.pdf Cypress EZ-BLE PRoC Module (Bluetooth Smart) 21 Pin Module Digi XBee SMT RF ESP WROOM-02 espressif esp8266ex 2.4 GHz Bluetooth.

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