2 layers35 × 43 mm
2 layers
Amulet
mitxela/amulet42Source code and KiCad design files for the UV Protection Amulet.
- Copper layers
- 2
- Thickness
- 0.8 mm
- Parts
- 31
- Nets
- 22
- Pads
- 77
- Tracks, vias
- 301, 34
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Oct 2021
- Updated
- 29 Oct 2021
Overview
Amulet is an open-source printed circuit board by mitxela, from the mitxela/amulet repository on GitHub. It is a 2-layer board with 31 parts on 22 nets, routed with 301 tracks and 34 vias.
It is built around the ATTINY84A-MMH, TTP223-BA6 and VEML6075. Its parts include 11 diodes, 4 capacitors and 3 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY84A-MMH
VQFN-20-EP(3x3)1.8V~5.5V 10bit 12 20MHz 8KB AVR VQFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TTP223-BA6
SOT-23-6-40℃~+85℃ 1 1.5uA 2V~5.5V 4kV 60ms Capacitive Touch、Automatic sensitivity calibration No、Yes SOT-23-6 Touch Sensors ROHSTontek Design TechTouch Sensors
VEML6075
OPLGA-4(1.3x2)-40℃~+85℃ 1.25mm 1.7V~3.6V 16bit 1mm 2mm Built-in temperature compensation I2C OPLGA-4(1.3x2) Ambient Light Sensors ROHSVishay IntertechnologyAmbient Light Sensors
README
README.mdUV Protection Amulet
Source code and KiCad design files for the UV Protection Amulet.
Uses an ATtiny84, a TTP223 Capacitive sensing chip and the VEML6075 UV sensor. The PCB thickness is 0.8mm and the battery is a CR2032 3V Lithium coin cell.
The i2c routines were modified to not require external pullup resistors.
License: GPL v3
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3 |
| 2 | CapSense | TestPoint:TestPoint_Pad_D1.0mm | TP3, TP3 |
| 1 | 30pF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | ATtiny84A-MMH | Package_DFN_QFN:QFN-20-1EP_3x3mm_P0.45mm_EP1.6x1.6mm | U1 |
| 1 | Case | amulet:amulet | TP1 |
| 1 | G*** | amulet:pentagram | pentagram |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | MISO | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | MOSI | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | RST | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | SCK | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | TTP223-BA6 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | Tab | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | VDD | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | VEML6075 | amulet:VEML6075 | U3 |
The 29 most common of 31 parts.
Questions
What parts does the Amulet use?
31 parts, built around the ATTINY84A-MMH, TTP223-BA6 and VEML6075. 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 Amulet KiCad files?
From the mitxela/amulet repository on GitHub, at the commit this page was made from: the board is hardware/amulet.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Amulet design in my own project?
Its repository states no licence, so its author keeps all rights: ask mitxela before reusing the design.
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