Pimoco
About the Pimoco PCB
Pimoco is an open source PCB design by mlnoga, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 172.2 × 82.8 mm, with 18 components from 15 distinct parts.
Other key parts include the TMC5160-BOB, BMP280, GY-GPS6MV2 and LM2576S-5. By type, the board carries 7 ICs, 3 connectors, 2 diodes, 2 capacitors, 1 crystal and 1 fuse.
It belongs with the science & space, robotics & motion and iot & wireless designs in this gallery.
From the project
Telescope mount and focuser control with a Raspberry Pi
Telescope mount and focuser control with a Raspberry Pi
Why do we need a separate device to control stepper motors attached to a telescope? Often times, a Raspberry Pi 4 running Ekos/Kstars/Indi will be attached to the telescope anyway, providing plenty of compute power. Modern stepper motor controllers like the Trinamic TMC5160 have an on-board motion controller which accepts position read, set target speed and go-to commands via SPI. The Raspberry Pi has two such interfaces for a total of five devices on its GPIO port.
Main components on the Pimoco
Pimoco bill of materials (BOM)
18 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | TMC5160-BOB | TMC5160-BOB2 | U0, U1, U2, U3 |
| 1 | BMP280 | BMP280-Breakout | U4 |
| 1 | GY-GPS6MV2 | GY-GPS6MV2 | U5 |
| 1 | LM2576S-5 | TO-220-5_Vertical | U6 |
| 1 | CXO_DIP14_10MHz | Oscillator_DIP-14 | X1 |
| 1 | DS18B20 RJ45 | RJ45_Wuerth_7499111446_Horizontal-modified | J4 |
| 1 | Power | BarrelJack_Horizontal | J5 |
| 1 | RasPi_Header | PinSocket_2x20_P2.54mm_Vertical | J6 |
| 1 | Fuse 5A | Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F1 |
| 1 | Heatsink | Heatsink_TO-220_vertical | HS1 |
| 1 | D_Schottky_5A | D_DO-201AD_P15.24mm_Horizontal | D1 |
| 1 | 1N5822 | D_DO-201AD_P15.24mm_Horizontal | D2 |
| 1 | 100 uH | L_Radial_D12.5mm_P7.00mm_Fastron_09HCP | L1 |
| 1 | 100 uF | CP_Radial_D8.0mm_P3.50mm | C1 |
| 1 | 1000 uF | CP_Radial_D13.0mm_P5.00mm | C2 |
Pimoco design files
The KiCad project lives in the mlnoga/pimoco repository on GitHub; these links point at the commit this page was built from.
Pimoco: common questions
How big is the Pimoco PCB?
The Pimoco measures 172.2 × 82.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Pimoco?
18 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the Pimoco design files?
From the mlnoga/pimoco repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Pimoco design in my own project?
Yes, under the terms of its GPL-3.0 license, which mlnoga chose for the repository.
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