single wire VR/Hall solution

[rusefillc]

• same wire should support both Hall and VR input
• VR negative wires should not be needed, signal GND crimped at ECU should be sufficient for VR negative

[rusefillc]

source for inspiration or not https://speeduino.com/forum/viewtopic.php?t=4954?

[rusefillc]

Random honda schematics from the 90s https://github.com/rusefi/rusefi_documentation/blob/master/OEM-Docs/Honda/bomarc-services-p28.pdf