I again wasn’t looking to start another calculator project when this Burroughs C5155 calculator showed up in one of my automated searches. The price including shipping was a bargain, so I purchased it.

Barbouri's Electronics Projects
Restoring vintage electronics along with designing and building new circuits. One eye looking into the past, the other looking into the future.
I again wasn’t looking to start another calculator project when this Burroughs C5155 calculator showed up in one of my automated searches. The price including shipping was a bargain, so I purchased it.
During my wanderings on eBay I came across this 12 digit display Digitronic‑M calculator. It was an auction listing starting at $0.99 with a really low shipping cost, and the seller listed it as “works great!”. I put in a very low bid on it, not expecting to win it, but it turned out I was the only bidder. That was the good part of the transaction.
Continue reading “Digitronic‑M Calculator Repair”The APF Mark XII (12) is an interesting calculator. It is based on the Cal-Tex Semiconductor Inc. CT5005 FlexiChip, which was developed in 1972. The calculator is a four function with separately addressable memory register, all on a single IC.
A recent addition to the desktop calculator collection is the Canon Canola L100A desktop 10 digit gas discharge display calculator. This unit was purchased as a working calculator, and was in good shape except the heavy yellowing of the beige upper case..