4 layers85 × 56 mm
Lobby
oclyke/cm4crypto
cm4crypto is an adapter board that allows you to use an M-Key M.2 compatible module with the Raspberry Pi Compute Module 4 (cm4).
41 parts
2 layers39.8 × 23.8 mm
Sergo
tseary/Sergo1RC Servo controller for Lego Power Functions
- Size
- 39.8 × 23.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 20
- Pads
- 75
- Tracks, vias
- 223, 38
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 21 Sep 2019
- Updated
- 11 Nov 2024
Overview
Sergo is an open-source printed circuit board by tseary, from the tseary/Sergo repository on GitHub. It is a 2-layer board of 39.8 × 23.8 mm with 20 parts on 20 nets, routed with 223 tracks and 38 vias.
It is built around the MYLSM00502ERPL and TSOP38238. Its parts include 5 capacitors, 4 resistors, 3 connectors, 2 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
MYLSM00502ERPL
SMD-40℃~+85℃ 1 120uF 13.1W 1V~5.25V 2.3mm 2.5A 2.5MHz 30mVp-p 4.5V~17V 7.9mm 7.9mm 88% Short Circuit Protection、Over Current Protection、Under Voltage Protection、Overheat Protection、Automatic fault recovery、Light load efficient mode SMD Isolated Power Modules ROHSMurataIsolated Power Modules
TSOP38238
SIP-3-2.54mm-25℃~+85℃ 10mW 2.5V~5.5V 350uA 38kHz 45m ±45° SIP-3-2.54mm Infrared Remote Receiver (IRM) ROHSVishay IntertechnologyInfrared Remote Receiver (IRM)
README
README.mdSergo
Sergo is a custom circuit board I made to interface hobby servos (or Geek servos) with Lego Power Functions. It has an ATTINY84 microcontroller and a 5 V, 2.5 A buck converter. It supports up to two servos, and can be controlled either from a PF receiver or directly by IR remote. It is programmed in Arduino.
Make Your Own
Disclaimer: This is not a how-to guide. I have shared this project for general interest and in case the source code is useful to anyone. However, if you want to make your own Sergo, I am assuming you already have some knowledge of surface-mount soldering. You will need reflow soldering materials and equipment. This project cannot be assembled with only a soldering iron!
Gather Parts
The bare PCB without components can be ordered from OSH Park.
Here is a Digikey cart with all of the components. The cost of parts for one board is about $15.61 CAD (or $13.92 CAD if the IR receiver is omitted).
It is recommended to apply solder paste to the board with a stencil. I used a polyimide film stencil of 0.005" thickness from OSH Stencils. The stencil gerber file is "KiCad/gerbers/Sergo-F_Paste.gbr". Alternatively, solder paste may be applied freehand with a syringe. Particular care should be taken to apply the paste neatly under the buck converter PS1.
Assembly, Programming, and Testing
More details to come...
Show Me!
If you do attempt to build this project, I'd like to see it! Find me on Eurobricks.
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 0.1uF | Custom_Library:0805 | C3, C4, C5 |
| 2 | 10k | Custom_Library:0805 | R2, R3 |
| 1 | 1.5A | Custom_Library:1812 | F1 |
| 1 | 15V | Custom_Library:SOT-23_Diode_ANK | D1 |
| 1 | 1k | Custom_Library:0805 | R1 |
| 1 | 220uF 10V | Custom_Library:C_SMT_D8 | C2 |
| 1 | 33 | Custom_Library:0805 | R4 |
| 1 | 47uF | Custom_Library:1206 | C1 |
| 1 | ATTINY84-S | Custom_Library:SOIC-14 | U1 |
| 1 | CH1 | Custom_Library:0805_JUMPER | JP1 |
| 1 | CH2 | Custom_Library:0805_JUMPER | JP2 |
| 1 | ICSP | Custom_Library:Pin_Header_02x03 | P2 |
| 1 | MYLSM00502ERPL | Custom_Library:DC-DC_MYLSM00502ERPL | PS1 |
| 1 | POWER FUNCTIONS | Custom_Library:Conn_Micro-MaTch_215570-4 | P1 |
| 1 | SERVOS | Custom_Library:Pin_Header_02x03 | P3 |
| 1 | TSOP38238 | Custom_Library:TSOP382_RA | U2 |
| 1 | ZENER 4.3V | Custom_Library:SOT-23 | D2 |
Questions
How big is the Sergo PCB?
It measures 39.8 × 23.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sergo use?
20 parts, built around the MYLSM00502ERPL and TSOP38238. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Sergo KiCad files?
From the tseary/Sergo repository on GitHub, at the commit this page was made from: the board is KiCad/Sergo.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sergo design in my own project?
Its repository states no licence, so its author keeps all rights: ask tseary before reusing the design.
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