Schakelbord
About the Schakelbord PCB
Schakelbord is an open source AVR/Arduino PCB design by robbertvdzon, published on GitHub. It is a 2-layer board measuring 200 × 170 mm, with 105 components from 29 distinct parts.
Its main chip is the Arduino_Nano_ESP32, from the AVR/Arduino family. Other key parts include the MCP23017x-x-SP. By type, the board carries 41 resistors, 29 diodes, 12 transistors, 11 connectors, 8 relays and 2 capacitors.
Main components on the Schakelbord
Schakelbord bill of materials (BOM)
105 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP23017x-x-SP | DIP-28_W7.62mm | U1 |
| 1 | Arduino_Nano_ESP32 | Arduino_Nano | A1 |
| 9 | BC337 | TO-92_Inline | Q1, Q5, Q6, Q9, Q10, Q11, Q12, Q13 +1 |
| 3 | IRLZ44N | TO-220-3_Vertical | Q2, Q3, Q15 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J1 |
| 1 | Power | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J3 |
| 1 | mosfets | TerminalBlock_Phoenix_MKDS-1,5-3_1x03_P5.00mm_Horizontal | J4 |
| 1 | Relais 7&8 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J15 |
| 1 | Alalog i/o | TerminalBlock_Phoenix_MKDS-1,5-5-5.08_1x05_P5.08mm_Horizontal | J16 |
| 1 | Extra 1-4 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J17 |
| 1 | Extra 5-8 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J18 |
| 1 | Relais 5&6 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J19 |
| 1 | Relais 3&4 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J20 |
| 1 | Relais 1&2 | TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J21 |
| 1 | Input pins | TerminalBlock_Phoenix_MKDS-1,5-5-5.08_1x05_P5.08mm_Horizontal | J22 |
| 8 | SANYOU_SRD_Form_C | Relay_SPDT_SANYOU_SRD_Series_Form_C | K3, K4, K5, K6, K7, K8, K9, K10 |
| 8 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4, D6, D7, D8, D9 |
| 21 | LED | LED_D5.0mm | D5, D17, D32, D33, D34, D35, D36, D37 +13 |
| 1 | 0.1uF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1 |
| 1 | 470uF | Electrolytic_10.3x10.3mm | C2 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2k2 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 3k3 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2 |
| 1 | 1500 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R7 |
| 4 | 10K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R8, R24, R27, R30 |
| 1 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 3 | 120R | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R23, R26, R29 |
| 20 | 1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R31, R44, R45, R46, R47, R48, R49, R50 +12 |
| 8 | 680 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R34, R35, R36, R37, R38, R39, R40, R41 |
| 2 | 4k7 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R61, R62 |
Schakelbord design files
The KiCad project lives in the robbertvdzon/pepernotenmachine repository on GitHub; these links point at the commit this page was built from.
Schakelbord: common questions
What microcontroller does the Schakelbord use?
The Schakelbord is built around the Arduino_Nano_ESP32, from the AVR/Arduino family.
How big is the Schakelbord PCB?
The Schakelbord measures 200 × 170 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Schakelbord?
105 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the Schakelbord design files?
From the robbertvdzon/pepernotenmachine repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Schakelbord design in my own project?
The repository has no license, so all rights stay with robbertvdzon. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Schakelbord 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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