callan's video game and uc projects

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Sega Turbo LED Gauges Upgrade Kit Available

Details
Created: 18 May 2021

Sega Turbo Upright/Cabaret LED Gauges Upgrade Kits are now available for purchase for $120 USD plus shipping! 

The kits include 2 assembled gauges, 2 retainer plates, 2 LED driver boards, 2 replacement LED indicator lamps, 12 screws and the wiring harness, everything you need to replace the fake gauges normally found on these great machines. 

Installation is quite easy, no soldering or modifications to any circuitry is required. View the installation video here:

E-mail me directly at This email address is being protected from spambots. You need JavaScript enabled to view it. to order a kit! Please include your full address for calculation of shipping. 

YouTube Channel 74XX Goes Live!

Details
Created: 01 March 2019

It's time! I have decided to document some repairs as YouTube videos. The first will be a "Re-Repair", where I take a board I fixed, return it to non-working condition then describe my method live as I put it back together. Check it out 9PM EST on Thursday February 28!

https://youtu.be/gRgHS0Sztl8

Burgertime CPU-7 Reproduction

Details
Created: 13 January 2019

The CPU on a Deco/Bally/Midway Burgertime is sealed in a green tomb. If you think yours is pooched, replace it with this new one. More information coming soon, but for now please email me at This email address is being protected from spambots. You need JavaScript enabled to view it. if you want one.

Kit includes board, headers, new Texas Instruments ICs and a tested (but most likely used) 6502A CPU. 

DIY Kit - $69 USD

Assembled kit - $99 USD

TMS5110A Voice Chips

Details
Created: 08 January 2019

While repairing some Bagman boards I found that the TMS5110A was getting hard to find in a standard DIP package. Even those being sold as compatible showed up in this shrink-DIP format. So I had some adapters made!

These are old stock TMS5110ANL chips in an SDIP package with a custom made SDIP-DIP adapter. This will fit into a standard sized 28-pin DIP socket like the original used on Bagman.
 
These come preassembled (hand-soldered) with machined pin headers, which fit into the original socket (with a bit of force!). Each one will be tested in a Bagman before shipping.

Please contact me at This email address is being protected from spambots. You need JavaScript enabled to view it. if you wish to order. Standard price is $20 USD plus shipping.

Arcade PCB Repair Logs #6: Missile Command

Details
Created: 23 February 2018

This board comes from a fellow enthusiast who had taken a crack at it with no success. Luckily he installed sockets in a lot of places which should make some things much easier to diagnose!

The schematics are available (although a little fuzzy) in the manual. Missile Command runs on a 6502A CPU, like several other Atari boards. So the first thing we want to do is check all the bare minimums on the CPU. Turning on the board showed a solid blue screen and no activity on any pins on the CPU, besides the watchdog circuit resetting the CPU on its own about twice a second.

Why did I bother to post this picture

Read more: Arcade PCB Repair Logs #6: Missile Command

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