(Topic ID: 282117)

Twobits -35 mpu board S33 push button

By T-Tommy

11 months ago


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  • 25 posts
  • 8 Pinsiders participating
  • Latest reply 10 months ago by T-Tommy
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    S33 push button (resized).jpg
    S33 from Mouser (resized).jpg
    pasted_image (resized).png
    S33 (resized).jpg

    #1 11 months ago

    I'm working on a Twobits -35 mpu board. It's designed for something different than the standard Bally push button. Does someone sell one that fits on this board or should I just leave it vacant. Thanks

    #2 11 months ago

    I don't know that the switch adds much value, I think you would be fine to omit it.

    #3 11 months ago
    Quoted from T-Tommy:

    I'm working on a Twobits -35 mpu board. It's designed for something different than the standard Bally push button. Does someone sell one that fits on this board or should I just leave it vacant. Thanks

    The Two bits boards just uses a different type of push button at S33. Can be seen here.

    https://www.bigdaddy-enterprises.com/images/DASH35.JPG

    GPE sells a replacement switch as per the original Bally switch, not sure if these line up with the holes on the Two bits board. Without any switch at S33 you can't clear bookkeeping memory as far as I know (besides removing the 5101 or power to it)

    https://www.greatplainselectronics.com/proddetail.asp?prod=39-261-BLK

    #4 10 months ago

    What is the hole spacing and hole diameter on these?

    #5 10 months ago
    Quoted from G-P-E:

    What is the hole spacing and hole diameter on these?

    I just measured my Two bits board hole spacing which has a switch installed (same style switch as in the pic of the Two bits MPU)

    6mm high (pin to pin)
    12.5mm wide (pin to pin)

    #6 10 months ago

    I'd like to get a button like the one in the pic. I'll have to do some shopping.

    #9 10 months ago
    Quoted from G-P-E:

    What is the hole spacing and hole diameter on these?

    I get 5mm vertically and 12.5mm horizontal.

    S33 (resized).jpg
    #10 10 months ago

    OK -- Commonly used switches have a 4.5x6.5mm so this one won't work:
    https://www.greatplainselectronics.com/proddetail.asp?prod=TL1105

    #11 10 months ago

    Regular Grayhill Series 39 won't fit either - those are 2.54 x 7.62mm (typical Bally push button).
    https://www.greatplainselectronics.com/proddetail.asp?prod=39-261-BLK

    #12 10 months ago
    Quoted from G-P-E:

    Regular Grayhill Series 39 won't fit either - those are 2.54 x 7.62mm (typical Bally push button).
    https://www.greatplainselectronics.com/proddetail.asp?prod=39-261-BLK

    Thanks for chiming in. Mouser and digikey carry this; mfr E-Switch, part# TL1100AF160Q

    #13 10 months ago

    A two pin 6x5x5mm tactile button switch that has a lead pitch of 5mm work. just put it across the left two holes as shown in the picture.

    https://www.digikey.com/en/products/detail/te-connectivity-alcoswitch-switches/FSM2JRT/4146914

    pasted_image (resized).png
    #14 10 months ago
    #15 10 months ago

    I'm so use to seeing 5x6mm switches everywhere that I didn't notice there were any 12x12s.
    E-Switch is a good manufacturer, stick with their TL1100AF160Q and maybe a key cover such as 6JBLK.

    #16 10 months ago
    Quoted from Joydivision:

    Without any switch at S33 you can't clear bookkeeping memory as far as I know (besides removing the 5101 or power to it)

    On most -35 games you can use one of the coin switches (dont remember which one) instead of S33.

    #17 10 months ago
    Quoted from Tuukka:

    On most -35 games you can use one of the coin switches (dont remember which one) instead of S33.

    Had never heard of that, nice one! Tried a few Bally games, worked on 80s onward games, (was the coin switch closest to the lock) didn't appear to have this option on earler games I tried.

    #18 10 months ago
    Quoted from Tuukka:

    On most -35 games you can use one of the coin switches (dont remember which one) instead of S33.

    It was implemented in games with version -35 system U6 ROM and higher starting with Harlem Globe Trotters.
    Version -30 U6 system ROM and lower don't have it (ending with Paragon).

    Version -35 system U6 ROM also implemented the countdown option when setting score level threshold awards. While holding the start button, tap the self test button and scores will start counting down instead of up.

    #19 10 months ago
    Quoted from Quench:

    Version -35 system U6 ROM also implemented the countdown option when setting score level threshold awards. While holding the start button, tap the self test button and scores will start counting down instead of up.

    Thanks for that info! Every day something new to learn!

    #20 10 months ago
    Quoted from G-P-E:

    I'm so use to seeing 5x6mm switches everywhere that I didn't notice there were any 12x12s.
    E-Switch is a good manufacturer, stick with their TL1100AF160Q and maybe a key cover such as 6JBLK.

    Thanks for the tip. They offer the two combined. part # TL1100AF160Q6JBLK

    #21 10 months ago

    Got some from Mouser.

    S33 from Mouser (resized).jpg
    #22 10 months ago

    Got some from Mouser.

    #23 10 months ago

    Nice...

    S33 push button (resized).jpg
    #24 10 months ago

    Ahh, now it's there you can sleep at night!

    3 weeks later
    #25 10 months ago

    Also...I thought the button caps would slide right on, but they didn't. Had to file all four sides of the tab a little bit so the cap would slide on and grasp. Also added a little gorilla glue under the cap with a toothpick to make it more solid. Straightened out the legs with needle nose pliers to make it slide in the holes better.

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