How to wire a MCP2515 CAN Bus Module Board TJA1050 receiver

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To whom it may concern,

Sorry to trouble you… I was hoping you could advise on the correct wiring diagram for the MCP2515 CAN Bus Module Board TJA1050 receiver (Accelerometer).

In my case I am only going to use this accelerometer receiver card in my Lascar SGD 43A brake test instrument to measure the Zero speed stopping reference in the forward motion after undertaking a brake test.

Normally, the MCP2515 CAN Bus Module Board TJA1050 receiver is integrated as a SPI Interface for communication with microcontrollers. In my case I don’t want to use a microcontroller due to the additional processing time which is critical when calculating the m/sec² during a brake test.

Questions

Which pins do I need to connect to obtain the 1.5volts dc reference for 0 speed (0km/h).

What is the correct orientation of the card when installed in my meter. (Parallel to the ground with the pins and connection to the sky? Which face of the card needs to be facing the forward motion?) Note: I was planning to install the TJA 1050 receiver card on top of my enclosure in a mini enclosure on top with the card positioned as in the photos with the main enclosure top face parrael to the ground plane. (Please refer to attached photos)

I believe that the blue screw terminal termination connector is for the 5VDC supply. (H = + 5VDC, L = GND -0VDC return

Appreciate if you can advise and thanks for your support.

Regards

John Oste
johnoste@live.com.au

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The wiring diagram for a MCP2515 CAN Bus Module Board TJA1050 receiver module is here. The screw terminals are for the CAN bus, not power But that device is not an accelerometer. Are you considering linking it to a accelerometer via the CAN bus? If so then the question of orientation depends on the acceleromter you are using. But since the Lascar 43A is a portable device, orientation would depend on how you use that device in the car. This part of your project is not clear.

The TJA1050 Receiver is a SPI device so there is no way to connect it to the sensor inputs of a Lascar 43A. It is designed to be used with a MCU. The MCU would be the best place to calculate the decelleration rate, and would also be the best way to display the result, rather than trying to interface the MCU to the Lascar43A.

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