VR Conditioner - Revision history

ZeeKay at 14:38, 23 April 2026

2026-04-23T14:38:11Z

← Older revision		Revision as of 14:38, 23 April 2026
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	VR (Variable Reluctance) Conditioners take the semi-sinusoidal signal generated by VR sensors and outputs a (typically) 5v square wave that can be interpreted by modern ECUs. There are many variants, including hardware built into ECUs, add-in boards, and OEM standalone styles.		VR (Variable Reluctance) Conditioners take the semi-sinusoidal signal generated by VR sensors and outputs a (typically) 5v square wave that can be interpreted by modern ECUs. There are many variants, including hardware built into ECUs, add-in boards, and OEM standalone styles. These are not needed for Hall or Optical sensors as those generate square waves natively.

	== Discrete ==		== Discrete ==

ZeeKay at 14:36, 23 April 2026

2026-04-23T14:36:43Z

← Older revision		Revision as of 14:36, 23 April 2026
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	== "JDM" Conditioner ==		== "JDM" Conditioner ==
	Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas.		Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas. Based on lm393.

	== HEI 7/8 ==		== HEI 7/8 ==

ZeeKay at 14:34, 23 April 2026

2026-04-23T14:34:04Z

← Older revision		Revision as of 14:34, 23 April 2026
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	"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.		"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.

	=== ~~Built in~~ uaEFI ~~module~~ ===		=== uaEFI ===

	==== mck1117 vr-interface ====		==== mck1117 vr-interface ====
	Based on the lm1815, open source		Built in "discrete" input. Based on the lm1815, open source

	https://github.com/mck1117/vr-interface/tree/master		https://github.com/mck1117/vr-interface/tree/master

	== MAX9924/9926 ==		== MAX9924/9926 ==
	Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.		Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated. 24 is single channel, 26 is dual channel.
	[[File:MAX9924 Diagram.png\|thumb\|MAX9924 Circuit Diagram]]
			=== uaEFI ===
			[[File:MAX9924 Diagram.png\|thumb\|MAX9924 Circuit Diagram]]Built in 'VR2/Hall' input

	== "JDM" Conditioner ==		== "JDM" Conditioner ==

ZeeKay: /* Examples */

2026-04-23T14:29:10Z

Examples

← Older revision		Revision as of 14:29, 23 April 2026
Line 4:		Line 4:
	"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.		"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.

	=== ~~Examples~~ ===		=== Built in uaEFI module ===
	~~Built in uaEFI module~~
			==== mck1117 vr-interface ====
			Based on the lm1815, open source

			https://github.com/mck1117/vr-interface/tree/master

	== MAX9924/9926 ==		== MAX9924/9926 ==
	Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.		Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.
			[[File:MAX9924 Diagram.png\|thumb\|MAX9924 Circuit Diagram]]

	== "JDM" Conditioner ==		== "JDM" Conditioner ==

ZeeKay at 14:21, 23 April 2026

2026-04-23T14:21:19Z

@@ Line 29: / Line 29: @@
 * + - 12v, Battery (And coil positive if using)
 * C - Coil negative (typically unused)
 ==== Part Numbers ====
-Reference part number is lx315 and can be found via many sources
+Reference part number is lx315 and can be found via many sources.
 == Speeduino Socket ==
 Many modules follow the 'Speeduino' style of pin layout which is a DIP-8 socket format.
 [[File:Speeduino DIP8 VR Conditioner Pinout.png|thumb|Speeduino DIP8 VR Conditioner Pinout]]

ZeeKay: Created

2026-04-23T14:11:08Z

Created

New page

VR (Variable Reluctance) Conditioners take the semi-sinusoidal signal generated by VR sensors and outputs a (typically) 5v square wave that can be interpreted by modern ECUs. There are many variants, including hardware built into ECUs, add-in boards, and OEM standalone styles.

== Discrete ==
"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.

=== Examples ===
Built in uaEFI module

== MAX9924/9926 ==
Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.

== "JDM" Conditioner ==
Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas.

== HEI 7/8 ==
THE HEI 7 OR 8 IGNINTION MODULES WERE MADE BY GM IN THE 90S AND ARE GODS OWN VR CONDITIONER. ALSO KNOWN AS SILVERBACK BANNANA OR JUST USE THIS ONE.

=== HEI 7 ===
Typical use is to use the 12v/ground, VR pins, and only the signal out to condition (Pin R) VR sensors, not the actual ignition modules. The HEI 7 uses spade terminals of ?? size.

==== Pinout ====
[[File:HEI7 Wiring.png|thumb|Wiring/Circuit diagram for HEI7 ignition module]]

* B - Bypass Mode (used for dwell control, typically unused)
* R - Reference - 5v square wave, hall input on ECU
* E - Dwell control from ECU (typically unused)
* N - VR Sensor Negative -
* P - VR Sensor Positive +
* + - 12v, Battery (And coil positive if using)
* C - Coil negative (typically unused)

==== Part Numbers ====
Reference part number is lx315 and can be found via many sources

== Speeduino Socket ==
Many modules follow the 'Speeduino' style of pin layout which is a DIP-8 socket format.
[[File:Speeduino DIP8 VR Conditioner Pinout.png|thumb|Speeduino DIP8 VR Conditioner Pinout]]