Colin O’Flynn of NewAE designed this simple CAN to 3.3V logic level interface:
CANoodler is a simple CAN (not CAN-FD) interface, which provides logic-level 3.3V output. It’s designed to be used with microcontrollers that have CAN blocks inside them, and in particular uses a pinout on some ChipWhisperer CW308 (UFO) Target boards.
It’s kinda nice (I think anyway) since it has these features:
- LEDs for TX/RX (uses MOSFET to drive LEDs so doesn’t slow your I/O pins down).
- Reverse-polarity protection on 3.3V input.
- Switch for CAN termination on/off with LED feedback.
The design files are available on GitHub:
coflynn has shared the board on OSH Park:
Kevin H. Patterson designed this solution for trailer light wiring after installing a towing hitch on his vehicle:
This is a power module designed to control trailer lights based on signals from your vehicle’s lighting circuits. Most vehicles have at least 4 separate circuits: Running (Tail) Lights, Brake, Left Turn, and Right Turn. Most basic trailers have a 4-wire connector with only 3 signals: Running (Tail) Lights, Left Turn, and Right Turn. The trailer does not have a separate circuit for Brake lights; applying the Brake is supposed to light up both the Left and Right Turn signals together.
The board can be purchased on Tindie:
4-Line to 3-Line Combining Tail Light Power Module for 12V Systems
MyLab-odyssey created this board tho monitor the status of your Smart electric drive EV with this RFduino CAN bus dongle and the Blynk app on your mobile phone:
- RFduino MCU & BLE
- MCP2515 CAN controller
- MCP2562 CAN transceiver + ESD diode
- OKI 78SR DC/DC for efficiency.