External
About the External PCB
External is an open source PCB design by mkramar, published on GitHub. It is a 2-layer board measuring 45 × 45 mm, with 54 components from 42 distinct parts.
Other key parts include the LM2678-3.3V, LM2678-12V, MA700 and LM5019. By type, the board carries 14 resistors, 12 capacitors, 7 connectors, 6 transistors, 6 diodes and 4 ICs.
Main components on the External
External bill of materials (BOM)
54 components, 42 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM2678-3.3V STSPIN32F0 | STSPIN32-nopad | U1 |
| 1 | LM2678-12V LTC2876 | LTC2876 | U2 |
| 1 | MA700 | QFN-16-1EP_3x3mm_Pitch0.5mm | U3 |
| 1 | LM5019 | DFN-8-1EP_4x4mm_Pitch0.8mm | U4 |
| 3 | PSMN3R3-40YS | PSMN3R3-40YS | Q1, Q3, Q5 |
| 3 | PSMN3R3-40YS | PSMN3R3-40YS-vias | Q2, Q4, Q6 |
| 1 | 8Mhz | Oscillator | Y1 |
| 1 | CONN_02X05 | Pin_Header_Straight_2x05_Pitch1.27mm_SMD | J1 |
| 1 | RS485 | Pin_Header_Straight_1x02_Pitch2.54mm | J3 |
| 1 | CONN_02X05 12 | Pin_Header_Straight_1x01_Pitch2.54mm | J6 |
| 1 | GND | Pin_Header_Straight_1x01_Pitch2.54mm | J9 |
| 1 | V | Pin_Header_Straight_1x01_Pitch2.54mm | J11 |
| 1 | U | Pin_Header_Straight_1x01_Pitch2.54mm | J12 |
| 1 | W | Pin_Header_Straight_1x01_Pitch2.54mm | J13 |
| 1 | CALIB | R_1206 | CALIB1 |
| 1 | ID | R_1206 | ID1 |
| 1 | CD0603-B0340R | D_SOD-323F | D1 |
| 1 | CD0603-B0340R | LED_0603 | D2 |
| 1 | ID | LED_0603 | D3 |
| 1 | D | D_SOD-323F | D4 |
Show 22 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CALIB | LED_0603 | D5 |
| 1 | D_Small | D_SOD-323F | D6 |
| 1 | 15UH 22uH | L_1210 | L1 |
| 1 | 33UH 220uH | L_1210 | L2 |
| 1 | 100uF | C_1210 | C1 |
| 1 | 22uF | C_0805 | C2 |
| 1 | 2uF | C_1210 | C3 |
| 3 | 1uF | C_0603 | C4, C5, C9 |
| 1 | 0.1UF 1uF | C_0603 | C6 |
| 1 | 0.01UF 1uF | C_0603 | C7 |
| 1 | 0.01UF 0.1uF | C_0603 | C8 |
| 1 | 0.01uF | C_0603 | C10 |
| 1 | 4.7uF | C_1206 | C11 |
| 1 | 100UF 0.1uF | C_0603 | C12 |
| 3 | 320 | R_0603 | R1, R2, R9 |
| 4 | 10 | R_0603 | R3, R5, R7, R8 |
| 1 | 10K 10 | R_0603 | R4 |
| 1 | 30K 10 | R_0603 | R6 |
| 1 | 237K | C_0603 | R10 |
| 2 | 10K | C_0603 | R11, R13 |
| 1 | 230K | C_0603 | R12 |
| 1 | 1Ohm | C_0603 | R14 |
External design files
The KiCad project lives in the mkramar/dizzyrobot repository on GitHub; these links point at the commit this page was built from.
External: common questions
How big is the External PCB?
The External measures 45 × 45 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the External?
54 components, from 42 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the External design files?
From the mkramar/dizzyrobot repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the External design in my own project?
The repository has no license, so all rights stay with mkramar. Use it as a reference, and ask the author before reusing the design.
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