dwtk-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.