2x2
About the 2x2 PCB
2x2 is an open source PCB design by brainsmoke, published on GitHub. It is a 2-layer board measuring 50 × 50 mm, with 36 components from 21 distinct parts.
Other key parts include the MCP73831, CC430F513x, ncp170axv330 and 0433bm15a0001. By type, the board carries 12 capacitors, 4 ICs, 4 resistors, 2 transistors, 2 diodes and 1 crystal.
It belongs with the power & battery, robotics & motion and displays & leds designs in this gallery.
From the project
Folded LED ball PCB
Circuit design derived from Travis Goodspeed's Goodwatch project, replacing the CC430F6137 with the smaller footprint CC430F5137:
https://github.com/travisgoodspeed/goodwatch
Lipo charging/load decoupling part of the circuit adapted from:
http://blog.zakkemble.co.uk/a-lithium-battery-charger-with-load-sharing/
Main components on the 2x2
2x2 bill of materials (BOM)
36 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP73831 | SOT-23-5 | U1 |
| 1 | CC430F513x | CC430F513x | U2 |
| 1 | ncp170axv330 | sot-563 | U3 |
| 1 | 0433bm15a0001 | 0433bm15a0001 | U4 |
| 2 | AO3401-P Mosfet | SOT-23 | Q1, Q2 |
| 1 | FA128 | FA128 | X1 |
| 1 | BSL | Pin_Header_Straight_1x06_Pitch1.00mm | J3 |
| 1 | Conn_01x01 | small_hole | ANT1 |
| 4 | - | small_hole | DATALED1, GNDBATT1, GNDLED1, VLED1 |
| 2 | CONN_01X01 | Pin_Header_Straight_1x01_Pitch2.54mm | GND1, VIN1 |
| 1 | CONN_01X03 | Conn-3 | SW1 |
| 1 | + | small_hole | VBATT1 |
| 1 | D_Schottky | D_0603 | D1 |
| 1 | VDROP | R0603 | D2 |
| 1 | L | C_0402_NoSilk | L1 |
| 7 | 100n | C_0402_NoSilk | C1, C3, C4, C6, C7, C9, C10 |
| 2 | 1u | C_0402_NoSilk | C2, C5 |
| 1 | 0.47u | C_0402_NoSilk | C8 |
| 2 | 19pF | C_0402_NoSilk | C11, C12 |
| 1 | 15K | R_0402_NoSilk | R1 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 56K | R_0402_NoSilk | R2, R3, R4 |
2x2 design files
The KiCad project lives in the brainsmoke/miniball repository on GitHub; these links point at the commit this page was built from.
2x2: common questions
How big is the 2x2 PCB?
The 2x2 measures 50 × 50 mm, has 2 copper layers and is 0.6 mm thick.
How many components are on the 2x2?
36 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the 2x2 design files?
From the brainsmoke/miniball repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the 2x2 design in my own project?
The repository has no license, so all rights stay with brainsmoke. Use it as a reference, and ask the author before reusing the design.
More boards in miniball
Similar boards
LevelShifterBreakout
scottbez1
15.2 × 20.3 mm5 parts2LApache-2.022.2k
View base
81.2 × 81.2 mm81 parts2LApache-2.022.2k
View screen
35 × 35 mm12 parts2LApache-2.022.2k
BM28B0.6-24DSBreakout
15.2 × 35.6 mm3 parts2LApache-2.022.2k
ChainlinkDriverTester
198.1 × 95.3 mm123 parts2LApache-2.04.2k
ChainlinkBase
98.4 × 190.5 mm119 parts2LApache-2.04.2k