Hall to VR signal conversion

Flexibility for your OBD1 conversion





VR. Hall.  Two sensors with different technologies and incompatible signals.  VR is “old school” and produces sinusoidal alternating current with voltage proportional to wheel speed.  Hall is a semiconductor technology with digital output.


Why would you need to convert a Hall sender signal to VR?  Most folks don’t, but if you are converting an engine to work with OBD1 electronics then you may  find this circuit useful.  Since OBD1 generally works with VR crankshaft position senders, your choices are to install a VR sensor on an appropriate signal wheel or convert your existing Hall sensor to VR with this circuit.


This circuit creates a signal that works as a VR inputs.  It creates an extremely clean signal from cranking rpm through 10,000 rpm.  Not recommended on less than 36 tooth wheels.


Version 3.0 board now adds status LED’s, features surface mount technology and tantalum capacitors for optimum reliability.   Because the board is critical for your motor to run, LEDs let you can see at a glance if it is working correctly.   Reliable in over 16,000 miles of operation.


$60 Shipped.