Shared Projects

UNTESTED ASMBv4 compatible SPI flash PCB for coreboot+OpenBMC on KCMA-D8 and KGPE-D16

See https://github.com/DanielG/asmb4

A compact GRBL board for use with Arduino Nano (or compatible) and A4988 (or compatible) stepper drivers.

Internal SNES mini Classic gameport adapter and switcher

The PanelDue is a colour touch screen controller for the Duet and other 3D printing electronics that support it. https://github.com/dc42/PanelDue

2018 Revision

Easy motion and gesture detection project. All SMD components is 0805 (2012), C1 10mF, C2 1.5mF, C3 1mF, R1-R3 10k, R4 20ohm.

OECVCI Open Electric Vehicle Control/Conversion Interface. Files: http://cafeelectric.com/sharedProjects/OEVCI/

Readme: v 1.0 10/31/18 Untested

This board is used to interface CAN bus signals in cars.

Commonly used when using modern EV (Electric Vehicle) parts in older vehicles.

Built around the Teensy 3.6 Microcontroller module, it provides:

2 CAN 2.0 ports. Solder jumper turns on termination.

6 Inputs: 12V nominal Analog or digital, protected from over and negative voltages.

6 Outputs: General purpose Open Drain might hold 2 amps. Ground trace limited.

2 Outputs: Pulse, low current Open Drain with pullup for driving tachometer and speedometer.

1 Fuel Gauge Output. 6 bits of Open Drain switched parallel 1206 Resistors to drive Gas gauge.

1 ISO-SPI for Linear Technology 6804/6811/6813 series BMS modules.

1 Coin Cell holder in case you want to use the RTC.

1 I2C header for running a small display or whatever.

1 Daughter board area 30x70 std perf board, (interferes with I2C)

Made to fit in a standard Polycase enclosure.

Possible future upgrades:

2 Automotive relays for general switching of the 4 high current (16A) terminals.

Daughter board with op amps and resistor arrays for sensing pack voltages, enabling contactor precharge and ground fault isolation testing of 400V systems.

Made with KiCad 5.0.1 on OSX

When first opening the schematic file, you may have to “recover footprints.”

I saved and included the google spreadsheet as pdf since it dropped sheets for ods.

I’m new to KiCad, so please feel free to contact me with suggestions.

Also, I haven’t bothered to consider the licenses, for now consider it free for non commercial use Contact me for permission for any use involving exchange of money.

-Otmar

Be sure to select “Otmar” in the link below so I will get your message:

http://cafeelectric.com/contact.php

A simple board to flip the feather headers so you can connect devices like the Hallowing and the Cricket that use surface mount headers that are mounted in the same orientation.

Full Bridge with Updated Resistors

A drum bot solenoid driver.

Boost Converter 3.7 to 5 V

AVR USB Joystick

CS Button Shift for I-PAC

2A 5V to 12V booster

https://github.com/aaronw2/12v-booster-2 BOM included, all parts are available from Digikey.

Slight redesign of Giovanni Bauermeister’s ESP01 USB Programmer. He used CH340C chips while I have CH340G, so I had to add the 12MHz crystal. While I was at it I did my own layout in Eagle 7, since that’s what I have and know. Please see his design at https://github.com/bauertronix/esp01-usb-programmer for more information.

Since I redrew the schematic, I probably have different part designators. So here’s the BOM:
* C1, C4 - 0.1uf 0603
* C2, C3, C5 - 2.2uf 0603
* C6, C7 - 22pf 0603
* R1 - 1K 0603
* R2, R3 - 10K 0603
* D1 - 0603 sized LED
* Q1, Q2 - MMBT3904 (NPN SOT23)
* U1 - 1117 3.3v regulator
* U2 - CH340G USB UART chip
* Y1 - 12MHz crystal (HC-49S package)
* JP1 - 8 pin (2x4) header to plug ESP-01 into
* J1 - KUSBX-SMT2AP5S USB plug (I get them from Mouser)

Note:
The ESP-01 points away from the USB connector. I believe this is opposite of Giovanni’s.