2 layers61.5 × 34.3 mm
2 layers68.6 × 39.4 mm
Dwtk ice mega
dwtk/dwtk-ice6An USB-connected In-Circuit Emulator for dwtk.
- Size
- 68.6 × 39.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 37
- Pads
- 137
- Tracks, vias
- 168, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 30 Dec 2019
- Updated
- 7 Jan 2022
Overview
Dwtk ice mega is an open-source printed circuit board by dwtk, from the dwtk/dwtk-ice repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 68.6 × 39.4 mm with 34 parts on 37 nets, routed with 168 tracks and 0 vias.
It is built around the ATMEGA88PA-PU and BC548. Its parts include 11 resistors, 5 connectors, 4 capacitors, 4 diodes and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mddwtk-ice
An USB-connected In-Circuit Emulator for dwtk.
Hardware
Schematics
Bill of materials
| ID | Description | Reichelt Item no. |
|---|---|---|
| U1 | ATtiny4313 | ATTINY 4313 PU |
| Q1 | BC548B | BC 548B |
| Y1 | Crystal 20,000MHz | 20,0000-HC49U-S |
| D1, D2 | Zener diode 3,6V | ZF 3,6 |
| LED1 | LED Red 5mm | LED 5MM RT |
| LED2 | LED Green 5mm | LED 5MM GN |
| C1 | Electrolytic capacitor 10uF/35V | RAD 10/35 |
| C2 | Multi-layer ceramic capacitor 100nF | X7R-5 100N |
| C3, C4 | Ceramic capacitor 22pF | KERKO 22P |
| R1, R2 | Carbon film resistor 1/4 W, 5%, 68 Ohm | 1/4W 68 |
| R3 | Carbon film resistor 1/4 W, 5%, 2,2K Ohm | 1/4W 2,2K |
| R4, R5 | Carbon film resistor 1/4 W, 5%, 1,5K Ohm | 1/4W 1,5K |
| R6 | Carbon film resistor 1/4 W, 5%, 22K Ohm | 1/4W 22K |
| R7 | Carbon film resistor 1/4 W, 5%, 470 Ohm | 1/4W 470 |
| USB1 | USB panel socket, type A | RND 205-00660 |
| H1 + H2 | Header pins 1x40 | SL 1X40G 2,54 |
| IC socket, 20-pin | GS 20 | |
| Prototype PCB 3cm x 7cm |
Prototype
DISCLAIMER
THIS PROJECT IS PROVIDED AS IS. USE IT AT YOUR OWN RISK. THIS DEVICE IS USB CONNECTED AND MAY DAMAGE YOUR COMPUTER.
The USB connections in the schematics are there just for reference, please check the actual pinout of your connector before assembling and/or using.
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R8, R9, R10, R11 |
| 2 | 1k5 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R5 |
| 2 | 22p | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C3, C4 |
| 2 | 3,6 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 2 | 68 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 2 | JST XH2P Female | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2, J3 |
| 1 | 100n | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C2 |
| 1 | 10u | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C1 |
| 1 | 20.0000 MHz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 2k2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | ATmega88PA-PU | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | AVR-ISP-10 | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J5 |
| 1 | AVR-ISP-6 | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J4 |
| 1 | BC548 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | Green | LED_THT:LED_D3.0mm | D4 |
| 1 | Jumper | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | H1 |
| 1 | Red | LED_THT:LED_D3.0mm | D3 |
| 1 | USB B Mini Female | custom-footprints:RND_205-00862 | J1 |
The 28 most common of 34 parts.
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Questions
How big is the Dwtk ice mega PCB?
It measures 68.6 × 39.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Dwtk ice mega use?
34 parts, built around the ATMEGA88PA-PU and BC548. 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 Dwtk ice mega KiCad files?
From the dwtk/dwtk-ice repository on GitHub, at the commit this page was made from: the board is hardware/dwtk-ice-mega/dwtk-ice-mega.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Dwtk ice mega design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).