Quoted from DumbAss:Let's clear up all the confusion on proximity sensor boards. You need to understand the history and revisions to understand what is compatible with what. Key post this if you want.
A-16922
"Proximity Sensor II" - the original release with STTNG.
Manual calibration.
Smaller form factor.
Uses 4N25 to interface with the switch matrix.
Uses 2x 3300pF capacitors for sensing.
Uses a base 9.09k Ohm resistor with a 2k potentiometer for adjustment.
A-17565
"Proximity Sensor III" - the later release with STTNG.
Manual calibration.
Smaller form factor.
Removed 4N25 and replaced with three discrete transistors to interface with the switch matrix.
Uses 2x 3300pF capacitors for sensing.
Uses a base 4.7k Ohm resistor with a 10k potentiometer for adjustment.
Has an associated service bulletin. See https://pinside.com/pinball/forum/topic/star-trek-next-generation-eddy-board-service-bulletin for more information.
A-18543-1 (note the -1)
Manual calibration.
Larger form factor.
Same circuitry as A-17565 with the service bulletin implemented.
Uses 2x 3300pF capacitors for sensing.
Uses a base 4.7k Ohm resistor with a 10k potentiometer for adjustment.
Used in Theatre of Magic for lane detection.
A-18543-2 (note the -2)
Manual calibration.
Same as A-18543-1 except for some component values.
Uses 1x 470pF and 1x 150pF capacitors for sensing.
Uses a base 2k Ohm resistor with a 10k potentiometer for adjustment.
Used in Theatre of Magic for trunk hit, Road Show for dozer hit and Scared Stiff for crate hit.
A-22149-2 (note the -2)
Auto (or self) calibration.
Even larger form factor.
Detection circuitry is similar but uses an electronic poteniometer rather than a rotary potentiometer.
Electronic potentiometer is under software control.
Uses 1x 680pF and 1x 820pF capacitors for sensing.
Uses a base 2k Ohm resistor with the electronic potentiometer.
Used in Cirqus Voltaire for ring master hit.
A-22149-1 (note the -1)
Same as A-22149-2 except for some component values.
Uses 2x 3900pF capacitors for sensing.
Uses a base 2k Ohm resistor with the electronic potentiometer.
Used in Monster Bash for phantom flip.
There are several manufacturers making both manual and self calibrating boards. Be aware that the manual calibration boards will only support either -1 or -2 but typically not both. When purchasing a manual calibration board, you must make sure you purchase the correct -1 or -2 variant.
These are the manufacturers that I am aware of. These boards may or may not be PHYSICALLY compatible. Check for form factor compatibility before purchase. If unsure then you should inquire with the manufacturer or merchant.
The order below is NOT an endorsement of any particular manufacturer. It simply random and whatever order I processed the list.
https://nvram.weebly.com/wms-a-16922--a-17565-eddy-proximity-sensor.html
MANUAL calibration
All SMT except for the TDA0161
Sized for A-16922 or A-17565 and supports both.
https://www.pinballlife.com/williamsbally-eddy-sensor-board-assembly.html
MANUAL calibration
All THT
Advertised as supporting A-18543-2.
Image appears to show -1 configuration. Beware purchase you receive is what you ordered.
https://www.tanglestech.com/TPP-1023
AUTO calibration
All SMT (including the TDA0161)
Advertised as supporting A-18543-1 and A-18543-2 and A-16922. Uses shunt jumpers to switch configuration. Unlikely to physically support both A-16922 and A-18543 due to size difference.
Available as bundle to replace all Theatre of Magic boards.
Appears to have an unpopulated 6-pin ICSP header.
I also have boards available. See https://pinside.com/pinball/forum/topic/dumbass-test-and-reproduction-pcbs/page/10#post-6308140 and https://pinside.com/pinball/forum/topic/dumbass-test-and-reproduction-pcbs/page/25#post-7516807 for images. Inquire with messaging if interested.