
Templog mainboard
Michael-Manning/E-Paper-Climate-Logger
Firmware, PCB, and enclosure for the Weathergotchi E-Paper climate logger.

Timer board is an open-source printed circuit board by visgence, from the visgence/timer_board repository on GitHub. It is a 2-layer board of 139.7 × 88.9 mm with 63 parts on 49 nets, routed with 612 tracks and 19 vias.
It is built around the 74HC04D, ATMEGA32U4 and DS3231MZ/V+, with the T9AS5D22-5 among its other parts. Its parts include 19 resistors, 11 connectors, 10 capacitors, 7 switches and 4 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Visgence Inc. Timer Board
| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | SM0603 | R1, R2, R8, R9, R13, R19 |
| 6 | 1uF | SM0603_Capa | C2, C3, C4, C5, C6, C7 |
| 5 | 5k | SM0603 | R5, R6, R7, R10, R11 |
| 4 | 2.2k | SM0603 | R4, R12, R16, R17 |
| 4 | pin | 1pin_C | p10, p11, p12, p13 |
| 2 | 1k | SM0603 | R3, R18 |
| 2 | 22 | SM0603 | R14, R15 |
| 2 | CP1 | SM1206POL | C1, C8 |
| 2 | LOGO | LOGO | G***, G1 |
| 2 | NPN | TO92 | Q1, Q2 |
| 1 | 1uF | SM0603 | C10 |
| 1 | 2X16_LCD | LCD16X2 | DS1 |
| 1 | 32Khz | PINTST | P6 |
| 1 | 74HC04 | SO14N | U2 |
| 1 | ADC | bornier2 | P5 |
| 1 | ATMEGA32U4 | TQFP44 | IC1 |
| 1 | AVR-ISP-6 | pin_array_3x2 | CON1 |
| 1 | BATTERY | CR2032 | BT1 |
| 1 | C | SM0603_Capa | C9 |
| 1 | DIODE | D4 | D2 |
| 1 | DOWN | SW_PUSH_6X6 | S2 |
| 1 | DS3231MZ | SO8N | U1 |
| 1 | FUSE | SM1206 | F1 |
| 1 | LEFT | SW_PUSH_6X6 | S3 |
| 1 | OUT | bornier2 | P4 |
| 1 | OUT_INV | bornier2 | P2 |
| 1 | POT | Var_resistor | RV1 |
| 1 | Power | LED-0603 | D3 |
| 1 | RESET | SW_PUSH_6X6 | S6 |
| 1 | RESONATORSMD | RESONATOR-SMD | Y1 |
| 1 | RIGHT | SW_PUSH_6X6 | S4 |
| 1 | Relay | SM0603 | D1 |
| 1 | SELECT | SW_PUSH_6X6 | S5 |
| 1 | T9AS5D22-5 | T9AS5D22-5 | K1 |
| 1 | Trigger | LED-0603 | D4 |
| 1 | Trigger | bornier2 | P3 |
| 1 | UP | SW_PUSH_6X6 | S1 |
| 1 | USBMICRO | USB-MICRO-B | P1 |
It measures 139.7 × 88.9 mm and has 2 copper layers, 1.6 mm thick.
63 parts, built around the 74HC04D, ATMEGA32U4, DS3231MZ/V+ and T9AS5D22-5. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the visgence/timer_board repository on GitHub, at the commit this page was made from: the board is timer_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask visgence before reusing the design.

Michael-Manning/E-Paper-Climate-Logger
Firmware, PCB, and enclosure for the Weathergotchi E-Paper climate logger.

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Hardware design files for the GPS version of the open-smartwatch




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