2 layers37 × 39.8 mm
2 layers30 × 40 mm
Avrwatch v2
hecko/avrwatch1Watch using AVR IC and display. Wearable.
- Size
- 30 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 28
- Pads
- 68
- Tracks, vias
- 163, 50
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Oct 2012
- Updated
- 25 Sep 2024
Overview
Avrwatch v2 is an open-source printed circuit board by hecko, from the hecko/avrwatch repository on GitHub. It is a 2-layer board of 30 × 40 mm with 10 parts on 28 nets, routed with 163 tracks and 50 vias.
It is built around the ATMEGA328P-AU, KCSA02-105 and ABS07-120-32.768KHZ-T. Its parts include 2 capacitors, 2 ICs, 2 connectors, 2 switches and 1 resistor. It belongs with the wearables boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
KCSA02-105
SMD-40℃~+85℃ 0.2 1 1.85V 10mm 3mm 6.9mm 7 Segment 75mW Common Anode Red SMD LED Segment Displays ROHSKingbrightLED Segment DisplaysABS07-120-32.768KHZ-T
SMD3215-2P-40℃~+85℃ 32.768kHz 55kΩ 6pF ±20ppm SMD3215-2P Crystals ROHSAbraconCrystals
README
README.mdplne funkcna a otestovana na ATMega8L - PDIP verzia
xtal (32kHz) musi byt zapojeny s externymi kondenzatormi (pozri errata v datasheete atmega8l) - pouzite 22pF (oznacenie 22) (na kazdej nozicke prepojene s GND) vsetky GND prepojene vsetky VCC prepojene AREF prepojeny cez 100n (oznacenie 104) kondenzator na GND 7 segment display SA36-11GWA cez cca 100 Ohm odpory (spolocna anoda) tlacitla su medi INT pinmi a GND s 10K resistormi na pinoch do VCC napajane cez CR2032, alebo 2xAA
programovanie je testovane na programatore usbtiny
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 6p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | SW_Push | QuorumPrecision:SW_PUSH_6mm_H9.5mm_center | SW1, SW2 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | ABS07-120-32.768KHZ-T | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | ATmega328P-AU | Package_QFP:TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | ICP | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J1 |
| 1 | KCSA02-105 | Display_7Segment:KCSC02-105 | U2 |
| 1 | ~ | QuorumPrecision:CR2032-120591 | P1 |
Questions
How big is the Avrwatch v2 PCB?
It measures 30 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Avrwatch v2 use?
10 parts, built around the ATMEGA328P-AU, KCSA02-105 and ABS07-120-32.768KHZ-T. 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.
Where can I download the Avrwatch v2 KiCad files?
From the hecko/avrwatch repository on GitHub, at the commit this page was made from: the board is PCB/avrwatch_v2/avrwatch_v2.kicad_pcb and its schematic PCB/avrwatch_v2/avrwatch_v2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Avrwatch v2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask hecko before reusing the design.
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