CAN bus voltage ID
Im trying to get my pdm25 to talk to my AEM cd5 dash. I have most of it working but the battery voltage is kicking my butt and Gemini/ChatGTP and Grock are all stuck on no help even though they got me to where everything else is working. I'm on a battery power supply that has my voltage right at 14.3 volts and my dash reads 48.1v. If i unplug my power supply battery voltage drops to the 12v ish and my dash goes to 40ish so whatever I'm reading is closely tied to the battery voltage. This is the info I was using for my CANbus settings and what the AEM dash is set to.
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This is a useful thread on CAN bus voltage ID. Getting the voltage levels right is one of those details that quietly makes or breaks communication reliability in automotive and industrial networks, so it is good to see it discussed in depth. For anyone working on the hardware side of things, material choice matters too, and Lithium Tantalate Crystal is a great example of a specialized material used in high-performance electronic and optical applications. Thanks for sharing this.