These have always worked for me. Look for them on eBay. Sometimes they come up rather cheap. Most of the time they are a bit under $10. There are other models as well that TI made for various calculators. Most have the proper barrel and polarity.
Texas Instruments 28-620 Kurt On Thu, Feb 11, 2021, at 3:18 PM, AvantGuard Systems wrote: > I have some many power supplies, but going through them all, they are mostly > 9 or 12 v. But I finally found one that is 5.7 v, 800 mA. On test turns out > it's center positive, but that's easy to fix. However, I think the jack is > too small. Anyhow, I can probably rig something up, if I get the board all > cleaned up. > > Curtis > > On Wed, Feb 10, 2021 at 12:33 AM [email protected] > <[email protected]> wrote: >> Hello, >> >> I power my M100 off a USB power supply, though I admit I made the cable >> myself. Dead or no longer used phones, tablets, GPS devices, ebook readers, >> etc. all came with these things. I have more than enough of them floating >> around, and it works for the M100 even though it is only 5V out. I tried >> to standardize things so I could use the USB power supplies for electronic >> devices, like the MVT100 display adapter. That method didn't work for the >> Psion 5MX, though, even though the thing really only wants 3 V (2 AA >> batteries). >> >> Jonathan >> >>> ----Ursprungligt meddelande---- >>> Från : [email protected] >>> Datum : 2021-02-09 - 21:26 (CEST) >>> Till : [email protected] >>> Ämne : [M100] Newbie >>> >>> Just joined the list as I just acquired a used TRS80 Model 100. Of course >>> it's not working, so I just wanted to first ask for some advice. I have >>> been reading info at Club100. >>> Basically, I feel I need to buy some stuff at Club100. First and foremost a >>> new battery, which is highly recommended. Also expansion RAM (since none >>> has been installed), probably the power supply (although maybe premature). >>> But probably better cost wise to get everything right away (shipping >>> costs!). >>> Anyhow, opening it up though I see that this thing obviously had batteries >>> left in it and there is dry acid (whatever that is) about that general area >>> on the board. My concern is that that might be enough damage that there's >>> no way to recover it. Or maybe cleaning that area up might be fine. What is >>> recommended for cleaning up battery acid, btw. >>> Thanks for any suggestions! >>> >>> Curtis >>
