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(Topic ID: 208738)

DIY: adding an external power supply to a Stern SAM/Whitestar


By lyonsden

2 years ago



Topic Stats

  • 15 posts
  • 6 Pinsiders participating
  • Latest reply 50 days ago by Parisno
  • Topic is favorited by 18 Pinsiders

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    #1 2 years ago

    These are instructions for adding an external power supply to a Stern SAM/Whitestar pinball machine that is switched on with the pinball machine. Overall, this is very easily done by tapping into the AC power going to the coin door for a bill acceptor. The reason you may want such a power supply is to drive high power consumption mods (e.g., a lot of LEDs), powered amplifier for upgrade sound, etc. If the power requirements are minimal, it is easy to use the power AUX port located near the front right of the pinball machine. The instructions are from a Stern TRON game with a couple of pinduinos driving ~300 addressable LEDs, which were drawing too much current and blowing the 5A circuit fuse.

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    #2 2 years ago

    Parts:

    22 gauge wire 2-pin wire
    - amazon.com link »

    Pins for 0.093” plugs (2x male)
    - https://www.greatplainselectronics.com/products.asp?cat=89
    - Part Number 02-09-2118

    Plug receptacle:
    - https://www.greatplainselectronics.com/products.asp?cat=94
    - Part Number 19-09-2029
    - Note: you can reuse the one in the game going to the coin door if you have a pin extractor tool

    Power supply:
    - You have lots of options that you can find on EBay, Amazon, etc.
    - I used this one because I needed both 12V and 5V with enough amps to drive 300 LEDs (~5A) on the 5V circuit
    - amazon.com link »

    Tools:

    Pin/Contact Extraction Tool, 0.093" (optional, if you want to use the plug that is in the game going to coin door)
    - https://www.greatplainselectronics.com/products.asp?cat=89
    - Part Number W-HT-2038
    - amazon.com link »

    Ratcheting crimping tool
    - amazon.com link »

    Soldering iron and solder (not really needed):
    - Up to you, I like the Hakko fx888d

    Wire cutters:
    - amazon.com link »

    Wire strippers:
    - amazon.com link »

    #3 2 years ago

    Instructions:

    - Open the coin door and raise the playfield
    - Locate a 2-pin plug on coin door wiring harness with black and white wires. This is the AC power a dollar acceptor
    - Pin and wire a 2-pin 0.093” plug receptacle, have enough wire to run to where you want to put the external power supply in the cabinet
    - Plug it into the AC power for the dollar acceptor
    - Run a ground wire from the pinball machine to the power supply (I used a ground braid connecting the left front leg bracket)
    - Run DC from the power supply to your mods.
    - Finished!

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    #4 2 years ago

    Tapping into the AC of a WPC that switches on with the game requires a bit more work. You either need to splice into the AC wires after the switch that run to the transformer, or open the switch box and solder wires to where the switched circuit feeds those wires. I'll open one of my games and get some photos of how that is done, but this thread shows how to tap into the AC circuit for powering a bill acceptor: https://pinside.com/pinball/forum/topic/installing-bill-acceptors-on-wpc-era-machines

    #5 2 years ago

    Thank you, that is really easy. Is there something like this on WPC games?

    #6 2 years ago
    Quoted from Brijam:

    Thank you, that is really easy. Is there something like this on WPC games?

    Glad you find this useful! Details for WPC games are in the post above:

    Quoted from lyonsden:

    Tapping into the AC of a WPC that switches on with the game requires a bit more work. You either need to splice into the AC wires after the switch that run to the transformer, or open the switch box and solder wires to where the switched circuit feeds those wires. I'll open one of my games and get some photos of how that is done, but this thread shows how to tap into the AC circuit for powering a bill acceptor: https://pinside.com/pinball/forum/topic/installing-bill-acceptors-on-wpc-era-machines

    10 months later
    #7 1 year ago

    Sorry to resurrect this, but I think it’s worthwhile. I just wired in a power supply using the above instructions (thanks!). Measures 13v DC at my available plug. But I’m hoping to use it for my colordmd which seems to be taxing the system. I notice the colordmd plug has three wires where my supply only has two outputs. Is one a ground? How do I wire it to power the lcd?

    Thanks

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    #8 1 year ago

    Glad this thread helped. If that is a plug to the standard AUX power port on STERN games, then the three wires are GND, +5V, and +12V. GND is at the point side of the plug. Different power supplies supply different voltages and currents. Did the one you get provide both +5V and +12V?

    #9 1 year ago
    Quoted from lyonsden:

    Glad this thread helped. If that is a plug to the standard AUX power port on STERN games, then the three wires are GND, +5V, and +12V. GND is at the point side of the plug. Different power supplies supply different voltages and currents. Did the one you get provide both +5V and +12V?

    Yes, that is the six plug Y-connector that came with the colordmd. I thought it runs on 12v based on what i read. Which is which on the other two wires?

    No, the ps I have has only 12v as far as I can tell.

    And thanks for the thread and the response! I’m a bit of an electrical newb.

    #10 1 year ago

    I’m pretty sure you need a power supple with both 5V and 12V like amazon.com link »

    The 5V is what is used to power the display.

    #11 1 year ago
    Quoted from paynemic:

    Yes, that is the six plug Y-connector that came with the colordmd. I thought it runs on 12v based on what i read. Which is which on the other two wires?
    No, the ps I have has only 12v as far as I can tell.
    And thanks for the thread and the response! I’m a bit of an electrical newb.

    Have you checked with colorDMD? Randy & Co. are usually quick with a response.

    #12 1 year ago
    Quoted from lyonsden:

    I’m pretty sure you need a power supple with both 5V and 12V like amazon.com link »
    The 5V is what is used to power the display.

    Purchased.

    1 year later
    #13 4 months ago

    Would this same procedure work on a Data East (Jurassic Park, in my case)?

    #14 4 months ago
    Quoted from fosaisu:

    Would this same procedure work on a Data East (Jurassic Park, in my case)?

    Yes -- I've connected many power supplies to various games. The key is to tap into an AC line that is after the main power switch to your game so that it turns on/off with your game. The dollar bill power is a good place, but you can always tap into the AC going to the main transformer as well.

    2 months later
    #15 50 days ago
    Quoted from lyonsden:

    Yes -- I've connected many power supplies to various games. The key is to tap into an AC line that is after the main power switch to your game so that it turns on/off with your game. The dollar bill power is a good place, but you can always tap into the AC going to the main transformer as well.

    Got the AC after the main power switch, am I right that FG is "floating ground" and is the ground circuit of the pinball not the mains ground?

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