Central control
About the Central control PCB
Central control is an open source AVR/Arduino PCB design by adarwoo, published on GitHub. It is a 4-layer board measuring 103 × 107 mm, with 147 components from 39 distinct parts.
Its main chip is the ATTINY3226, from the AVR/Arduino family. Other key parts include the LMR33630ADDA, LT1785AXS8, PC817 and PCA9555PW. By type, the board carries 68 resistors, 23 capacitors, 18 diodes, 16 ICs, 16 connectors and 3 test points.
From the project
All KiCad projects
Currently, PCBs for the cnc (see Youtube guillaume.arreckx channel) are publised.
Main components on the Central control
Central control bill of materials (BOM)
147 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LMR33630ADDA | Texas_HSOP-8-1EP_3.9x4.9mm_P1.27mm_ThermalVias | U1 |
| 1 | LT1785AXS8 LT1785AxS8 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | ATTINY3226 ATtiny3226 | SOIC-20W_7.5x12.8mm_P1.27mm | U3 |
| 10 | PC817 | DIP-4_W7.62mm | U5, U6, U8, U9, U10, U14, U15, U17 +2 |
| 3 | PCA9555PW | TSSOP-24_4.4x7.8mm_P0.65mm | U11, U12, U13 |
| 3 | 6PINS 6pins | PhoenixContact_MCV_1,5_6-G-3.81_1x06_P3.81mm_Vertical | J1, J2, J3 |
| 2 | 7PINS 7pins | PhoenixContact_MCV_1,5_7-G-3.81_1x07_P3.81mm_Vertical | J4, J5 |
| 5 | 3PINS 3pins | PhoenixContact_MCV_1,5_3-G-3.81_1x03_P3.81mm_Vertical | J6, J7, J11, J12, J14 |
| 4 | Phoenix | PhoenixContact_MCV_1,5_2-G-3.81_1x02_P3.81mm_Vertical | J8, J9, J10, J16 |
| 1 | ~ | GroundPlot | J13 |
| 1 | AVR-UPDI | PinHeader_2x03_P2.54mm_Vertical | J20 |
| 2 | ~ | Murata_NFM61R | F1, F2 |
| 1 | Vcc TP | TestPoint_Loop_D3.50mm_Drill0.9mm_Beaded | TP1 |
| 1 | GND_TP | TestPoint_Loop_D3.50mm_Drill0.9mm_Beaded | TP2 |
| 1 | IDLE | TestPoint_Loop_D3.50mm_Drill0.9mm_Beaded | TP3 |
| 14 | LED | LED_D3.0mm | D1, D6, D7, D8, D9, D10, D11, D12 +6 |
| 1 | red | LED_D3.0mm | D2 |
| 1 | orange | LED_D3.0mm | D3 |
| 1 | green | LED_D3.0mm | D4 |
| 1 | GRN | LED_D3.0mm | D5 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10UH 10uH | L_Wuerth_HCM-7070 | L1 |
| 2 | 10u 50v | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1, C5 |
| 1 | 220NF 220nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 2 | 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C10 |
| 1 | 10N 10n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 47U 47u | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C6 |
| 5 | 100N 100n | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C8, C12, C13, C14 |
| 1 | 100N 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 10 | 1nF 250V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C11, C16, C17, C18, C19, C20, C22, C23 +2 |
| 1 | 100K 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 24K9 24k9 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 680 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 1 | 100K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4 |
| 2 | 6K81 6k81 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R6 |
| 31 | 332 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R11, R12, R13, R14, R15, R17, R44, R45 +23 |
| 4 | 10K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R16, R83, R84, R85 |
| 17 | 432 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20, R21, R22, R30, R31, R32, R33, R34 +9 |
| 3 | 2K21 2k21 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R27, R28, R29 |
| 7 | 560 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R74, R75, R76, R78, R79, R80, R81 |
Central control design files
The KiCad project lives in the adarwoo/KiCad repository on GitHub; these links point at the commit this page was built from.
Central control: common questions
What microcontroller does the Central control use?
The Central control is built around the ATTINY3226, from the AVR/Arduino family.
How big is the Central control PCB?
The Central control measures 103 × 107 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Central control?
147 components, from 39 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 Central control design files?
From the adarwoo/KiCad 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 Central control design in my own project?
The repository has no license, so all rights stay with adarwoo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Central control 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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