Shared Projects by Mardzi

Simple single layer breakout board for VQFN20 (4x4x0.5mm) ICs, providing a breadboard compatible module using 2.54mm (0.1") pin headers. Originally developed to carry low-power harvesters BQ25504, BQ25505 or BQ25570 from Texas Instruments.

Related product information:

• BQ25504
• BQ25505
• BQ25570

A simple driver board for WS2812B digital RGB-LEDs using the ATxmega128AU.

Bill of Materials

| ID | Value  | Name               |
------------------------------------
| C1 | 4,7uF  | GRM188R61E475KE11D |
| C2 | 10uF   | GRM188R61A106ME69D |
| C3 | 100nF  | MC0402X104K100CT   |
| C4 | 100nF  | MC0402X104K100CT   |
| C5 | 100nF  | MC0402X104K100CT   |
| C6 | 100nF  | MC0402X104K100CT   |
| C7 | 100nF  | MC0402X104K100CT   |
| C8 | 4,7uF  | GRM188R61E475KE11D |
| C9 | 4,7nF  | MC0603B472J500CT   |
| D1 | 30V    | BAT54C,215         |
| D2 | Green  | KPH-1608SGC        |
| D3 | Yellow | KPH-1608SYCK       |
| D4 | Red    | KPH-1608EC         |
| J1 | FTDI   | Header 1x6 90°     |
| J2 | PWRSEL | Header 1x3         |
| J3 | LIPO   | 22-05-7025         |
| J4 | 5V     | 22-05-7025         |
| J5 | LED    | 22-05-7025         |
| J6 | PDI    | MicroMatch         |
| L1 | 220Ohm | BLM18AG221SH1D     |
| R1 | 100    | CRGH0603J100R      |
| R2 | 120    | CRGH0603J120R      |
| R3 | 120    | CRGH0603J120R      |
| R4 | 10K    | CRGH0603J10K       |
| R5 | 120    | CRGH0603J120R      |
| R6 | 10K    | CRGH0603J10K       |
| R7 | 10K    | CRGH0603J10K       |
| S1 | RESET  | KMR421NG           |
| S2 | USER   | KMR421NG           |
| U1 | 3.3V   | LT1129CST-3.3      |
| U2 |        | ATXMEGA128A4U-AU   |
| U3 |        | TLP118             |