Shield offset
About the Shield offset
Shield offset is an open source AVR/Arduino PCB design by apmarshall3, published on GitHub. It is a 4-layer board measuring 83.2 × 78.1 mm, with 125 components from 48 distinct parts.
Its main chip is the ARDUINO_UNO_R3, from the AVR/Arduino family. Other key parts include the 4077, NCP1117-5.0_SOT223, L298P, LMV331 and LMV358. By type, the board carries 37 diodes, 33 resistors, 22 capacitors, 12 connectors, 6 jumpers and 5 ICs.
It belongs with the robotics & motion and dev boards & breakouts designs in this gallery.
Main components on the Shield offset
Shield offset bill of materials (BOM)
125 components, 48 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 4077 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | NCP1117-5.0_SOT223 MCT1117C-5.0-TP | SOT-223-3_TabPin2 | U2 |
| 1 | L298P | SOIC127P1420X360-21N | U3 |
| 1 | LMV331 | SOT-353_SC-70-5 | U4 |
| 1 | LMV358 | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 2 | ARDUINO_UNO_R3 Arduino_UNO_R3 | Arduino_UNO_R3 | A1, A2 |
| 1 | Q_PMOS_GDS | SOT-223-3_TabPin2 | Q1 |
| 1 | 2N7002DWK | SOT-363_SC-70-6_Handsoldering | Q2 |
| 1 | SSM3J356R | SOT-23-3 | Q3 |
| 2 | SSM3J356R | SOT-23-3 | Q5, Q6 |
| 1 | ADC | IDC-Header_2x10_P2.54mm_Vertical | J1 |
| 1 | BATT | Amass_XT60PW-M_Kombifootprint | J2 |
| 1 | SCREW_TERMINAL_01X04 Screw_Terminal_01x04 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J4 |
| 1 | SERVO1 | PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | ULTRA | Molex_KK-254_1x04_P2.54mm_Horizontal | J6 |
| 1 | ENC1 | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J7 |
| 1 | SERVO2 | PinHeader_1x03_P2.54mm_Vertical | J8 |
| 1 | ENC2 ENC1 | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J9 |
| 1 | I2C | Molex_KK-254_1x04_P2.54mm_Horizontal | J10 |
| 1 | SERVO3 | PinHeader_1x03_P2.54mm_Vertical | J11 |
Show 28 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SERVO4 | PinHeader_1x03_P2.54mm_Vertical | J12 |
| 1 | Power OUT | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J13 |
| 1 | Fuse | Fuseholder_Clip-5x20mm_Littelfuse_445-030_Inline_P20.50x5.20mm_D1.30mm_Horizontal | F1 |
| 6 | SOLDERJUMPER_2_OPEN SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5, JP6 |
| 1 | PWR SW | SW_E-Switch_EG2219_DPDT_Angled | SW1 |
| 1 | SW_DIP_X01 SW_DIP_x01 | SW_DIP_SPSTx01_Slide_9.78x4.72mm_W8.61mm_P2.54mm | SW2 |
| 6 | SS14 CDBW140-G | D_SOD-123 | D1, D2, D3, D5, D6, D7 |
| 2 | US1G | D_SMA | D4, D21 |
| 8 | SS14 | D_SMA | D8, D9, D11, D12, D13, D14, D15, D16 |
| 1 | 5V | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 4 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D17, D18, D19, D20 |
| 1 | APA102 | LED_RGB_5050-6 | D22 |
| 14 | D_Zener | D_SOD-123 | D23, D26, D28, D30, D32, D34, D36, D38 +6 |
| 1 | US1G | D_SMA | D63 |
| 13 | 100N 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3, C6, C7, C8, C9, C10, C11 +5 |
| 1 | 100U 100u | CP_Elec_6.3x7.7 | C2 |
| 1 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 10U 10u | CP_Elec_6.3x5.7 | C5 |
| 6 | NL | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17, C18, C19, C20, C21, C22 |
| 1 | 10K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 2 | 0R15 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3 |
| 1 | 150R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 2K5 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 2 | 100R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R7 |
| 2 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9 |
| 6 | 0 | R_0603_1608Metric | R10, R11, R12, R13, R14, R15 |
| 14 | R | R_0805_2012Metric | R16, R17, R18, R19, R20, R21, R22, R23 +6 |
| 4 | 10K 10k | R_Array_Convex_4x0603 | RN1, RN2, RN3, RN4 |
Shield offset design files
The KiCad project lives in the apmarshall3/general-purpose-robotics-shield repository on GitHub; these links point at the commit this page was built from.
Shield offset: common questions
What microcontroller does the Shield offset use?
The Shield offset is built around the ARDUINO_UNO_R3, from the AVR/Arduino family.
How big is the Shield offset?
The Shield offset measures 83.2 × 78.1 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Shield offset?
125 components, from 48 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 Shield offset design files?
From the apmarshall3/general-purpose-robotics-shield repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Shield offset design in my own project?
The repository has no license, so all rights stay with apmarshall3. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Shield offset without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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