Photo: pinballphotos
  1. » Forum
  2. » Tech
  3. » Tech: Early solid state
  4. » TZ Mid playfield proximity sensor circuit question
(Topic ID: 236728)

TZ Mid playfield proximity sensor circuit question

By jgadzia

5 years ago



Topic Stats

  • 4 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by Asmig
  • No one calls this topic a favorite

You

Linked Games

Topic Gallery

View topic image gallery

20190221_081434 (resized).jpg
20190221_081441 (resized).jpg
0
0
0
#1 5 years ago
OP
 
JOE

jgadzia

Pinside member

US Lawrence, KS

10y 38,050 384 9 7

i am having issues with the mid playfield trough proximity sensor working all the time
i was considering adding a pot see this link:

http://actionpinball.com/tech/tz_prox.php

but the mid playfield sensor is a little different. It has both ends of a trace coming out of each side of a capacitor (C1) with one of the traces going back to the IC chip. I am not sure which trace to cut and put the pot in between. Any Ideas on this? I am thinking adding the pot between the connection from the sensor and the IC chip on the back

20190221_081434 (resized).jpg20190221_081434 (resized).jpg20190221_081441 (resized).jpg20190221_081441 (resized).jpg
0
0
0
#2 5 years ago
 
F X

Coyote

Pinside member

9y 107K 8,988

Since the trace is all on the PCB, a pot is very unlikely to fix your issue. The other ones (in all games) can be helped with adjusting, since the frequency to the sensor has to travel off the board, around other metal fixtures (assemblies) which would adjust the sensitivity of the reading.

0
0
0
#3 5 years ago
OP
 
JOE

jgadzia

Pinside member

US Lawrence, KS

10y 38,050 384 9 7

Quoted from Coyote:

Since the trace is all on the PCB, a pot is very unlikely to fix your issue. The other ones (in all games) can be helped with adjusting, since the frequency to the sensor has to travel off the board, around other metal fixtures (assemblies) which would adjust the sensitivity of the reading.

got it. Ok any ideas how to improve the sensitivity of this thing . when i am in switch mode and test it, it seems to work but during the game it will sometimes falsely identify the ball as a powerball.

0
0
0
#4 5 years ago
 
APS

Asmig

Pinside+ Frequent

US Vienna, OH

6y 68,050 303 16

OP
Quoted from jgadzia:

got it. Ok any ideas how to improve the sensitivity of this thing . when i am in switch mode and test it, it seems to work but during the game it will sometimes falsely identify the ball as a powerball.

Check the voltage going to it in switch test vs in game, maybe your 5v is being dragged down.

Promoted items from Pinside Marketplace and Pinside Shops!
From: $ 179.95
Gameroom - Decorations
TWILIGHT ZONE PINBALL - ROD SERLING sculpture POWERBALL
pinballmod
 
10,750 (OBO)
Machine - For Sale
Twilight Zone
Canfield, OH
Skypilot
$ 79.99
Cabinet - Armor And Blades
Twilight Zone PinBlades
PinGraffix Pinside Shop
 
$ 21.99
Lighting - Interactive
TZ Load Gumball Light
Lee's Parts
 
$ 12.95
Playfield - Decals
Twilight Zone - STARFIELD Ball Diverter DECAL - A MUST HAVE!
Pinball Pimp
 
$ 24.00
Various Novelties
Pinball Phone Case - Lava Blue (Gumball)
Pinball Photos LLC
 
$ 14.95
Playfield - Decals
Twilight Zone - STARFIELD Mini Playfield Light DECAL MOD
Pinball Pimp
 
$ 24.00
Various Novelties
Pinball Phone Case - Lava Orange (Gumball)
Pinball Photos LLC
 
$ 359.00
Playfield - Other
Twilight Zone 3rd Magnet Kit, Complete, Free Shipping!
NO GOUGE PINBALL™
 
$ 10.00
Playfield - Decals
Twilight zone flipper mod
Pinball Haus
 
$ 110.00
Playfield - Toys/Add-ons
TWILIGHT ZONE PINBALL - FEATURELESS MANNEQUIN
pinballmod
 
From: $ 55.00
Gameroom - Decorations
Professional Pinball Art Print - Twilight Zone
Pinball Photos LLC
 
From: $ 100.00
Lighting - Interactive
Twilight Zone Interactive Door Lights
Professor Pinball
 
$ 24.00
Various Novelties
Pinball iPhone Case - Lava Green (Gumball)
Pinball Photos LLC
 
Wanted
Machine - Wanted
Wanted: Twilight Zone
Corona, CA
Sirgubster9
$ 250.00
Lighting - Interactive
Twilight Zone Interactive Ramp and Gumball Lighting Kit
Professor Pinball
 
$ 19.95
Lighting - Led
Twilight Zone Colored LED Kit
Mitchell Lighting
 
$ 399.00
Cabinet - Decals
Twilight Zone RAD CALS Cabinet Art
Mircoplayfields
 
$ 10.00
Cabinet - Decals
Twilight zone diverter decal
Pinball Haus
 
$ 14.95
Playfield - Toys/Add-ons
Twilight Zone Pinball Flipper Bat Topper MODs (Set of 3)
ULEKstore
 
$ 1,059.00
Pinball Machine
Twilight Zone 3 Magnet Prototype Mirco Repro Playfield set
Mircoplayfields
 
$ 45.00
Playfield - Toys/Add-ons
PYRAMID MOD
Just 3D Mods
 
$ 129.50
Cabinet - Decals
Twilight Zone Clock Board
Pinball Haus
 
8,250
Machine - For Sale
Twilight Zone
Bradenton, FL
newtoit
10,000 (OBO)
Machine - For Sale
Twilight Zone
Mount Pleasant, WI
mcpin
$ 1.00
Pinball Machine
Twilight Zone - To be Restored
Pinball Alley
 
$ 24.95
Lighting - Led
Twilight Zone Vapor Metallic LED Kit
Mitchell Lighting
 
$ 259.99
Cabinet - Toppers
The Twilight Zone Pinball Hologram Topper & IGT slot machine
Lighted Pinball Mods
 
Hey modders!
Open a free Shop and start selling on Pinside
Your shop name here

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!

This page was printed from https://pinside.com/pinball/forum/topic/tz-mid-playfield-proximity-sensor-circuit-question and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.