Wow! the world works in mysterious ways. I literately pulled my late father's TRS-80 pocket computers out from storage about an hour before this video was posted. I have both models. The long one and the PC-3. I also have the cassette adapter that I spent that last hour cleaning the leaked AA batteries out. I go to relax after and refresh my RU-vid subscriptions and low and behold this vid appears. I couldn't believe it. I will need to order a screen soon as my PC-3 needs a new one. I've watched and loved the past uploads on the screen making process. Thanks again for your hard work on keeping some vintage computers alive.
Great ! I have got one comp like this and after some years the lcd panel has gone down (blackish lcd) so I will need to replace it. The comp is absolutely great think of the computer world.
Nice to see someone brought real replacement LCDs for the old single line PC units, so many of those with bad displays. also man, if only the 1260s didnt use dual lines, my 1262 has a nick at the right top edge of the lcd and bleed :c. always concerned that will spread.
Just got my Dads old Sharp pc-1250a back up and running (The TRS-80 equivalent). Had such memories of making little programs on it in High School (Ya, you can tell I was a hit with the ladies) Had a problem getting it working because I put the batteries in both positive side downward (Long story, the pic on the back cover to read the orientation was distorted). Your video help me remember. XD
That's an awesome project, well done! It must have been quite the effort to make a perfect copy of the original. Too bad there aren't projects like this for other devices. 24:40 - on a few (unrelated) LCDs I've repaired, it did matter which strip went where, and which side faced where.. I ran into a lot of frustration from that lol I figure the contacts made just enough of an impression on the rubber over time, or something.
Any tips for bending the top tabs on an EL5100 calculator ? I am missing segments then realised that the PCB was bowing between the tabs which might explain that. I am going have a fresh go on another day and am wondering if there is a way of bending them precisely the right amount (not too hard, not too lose.
Thanks for the video Robert ... I'm having some "fun" with a Texas Instruments CC-40 computer at the moment ... I'm hoping it's just the elastomeric strips and the LCD panel itself is okay - I've got three machines, two have damaged panels ... trying to get one good, working machine out of the three ... but I also have a Sharp PC-1245 that I need to also fix, so I'll definitely grab one of your new panels for it! :) /Brett
It for those, like me, who had fond memories of making little games on these things and now have a way to keep backups. :) I can say with 100% that the CE-123P printer and cassette interface can not only save program files to a Windows 10 PC but can also read. Just with these instructions: To Save: Connect Red to Mic, grey to head phones Start Audacity Set as Follow: 1 (Mono) Recording Channel Under Preferences set: Sampling (Default Sample Rate: (11025 Hz)) (Default Sample Format: (16-bit)) Start Recording in Audacity Start the CSAVE"(File Name)" on the Pocket PC After the Pocket PC has stop displaying the 'BUSY' indicator then stop Audacity Recording Double Click to WAV display to Select it. Under Effects: 'Normalize'. DO NOT mess with defaults and hit 'OK' Export the WAV and under 'Export as Save as type' select 'Other uncompressed files' Format Options: Header "WAV (Microsoft)", Encoding "Unsigned 8-bit PCM" That Should do it. To Load : FIRST: Make sure no other sounds are playing in the Background. Type CLOAD"(File Name)" then run WAV file that was saved. Hope this helps some of you.
Hi. Awesome. Are there plans for other models LCD's? I have a PC-1262 which has the black death and I fear that model is too rare for one of your replacement LCD"s.The PC-1262 is a Sharp pocket computer that has the same external form factor than the PC-1251 of this video, but with a bigger screen of 2x24 character. An awesome calculator combining the advantages of the compact 1251 derived and the bigger one with bigger screens.
I also tried. It did not work on medium heat. It was still warm when I put the old LCD in acetone and after 45 minutes it was loose enough to put apart the bezel from the LCD.
@@RobertBaruch Good day. Recently I got a 1245 with a display in poor condition and I am also interested in buying a new one. I google this problem a little and found your channel and this booth.pm/en/items/2353666 but it is too expensive from my point of view
@@DmiA I do have a 1245 replacement, but I haven't made a video for it, so I haven't put it in the tindie shop. However, if you order a 1246 and put in the note that you want a 1245 instead, I can send one to you. Getting the alignment right is tricky, and I'll put a note in the order about some alignment tips.
Damnit. I had just replaced my PC-1 and didn't think the PC-3 used the same LCD. Ah well got to now order another one. As a side note. As a side note its making me look at these things more. The side port is remarkably simple and the cassette port is a simple 1khz/4khz (1/0) interface. Might be possible to make a tap interface to one of those nano-watt microcontroller to act as a cassette port. Problem I am running into is interface. A single, led will take up more power than everything combined. Funny how writing all this makes you think of solutions. Maybe it can send a program to the pc1 a menu program for you to load. Humm. Ugh can't stop thinking about it now.
I did a cassette replacement for the fx502p calculator: trochilidae.blogspot.com/2017/06/fx502p-cassette-interface.html It's powered by USB as it uses an Arduino Due so it's not micropower. You can store programs on SD card though, and send them back. It's an easy way on the 502p to access the alphanumeric characters as you can edit the data before returning it. Also did one for the Microtan computer: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aNUTthUhsHo.html That one is even less micropower as it uses an OLED display. You may be able to do a micropower one, but it does take quite a lot of processing to capture and analyse the data stream...
"Acetone eats plastic, so you want to stay away from these tupperware containers" I seriously roll my eyes every time i hear something like this. And then you're putting acetone in a plastic bag, which according to your own logic should melt, and it evidently doesn't. You can use acetone safely with polypropylene containers, absolutely no reaction. The vast majority of kitchen containers are OK, and you can generally just read the bottom to determine the material. Also no reaction with any connectors, switchgear or packages soldered onto the PCB. Reason: they must be able to survive ketone wash, which some PCB populating factories use. Strong solvent action with polystyrene and its copolymers. So most disposable cups and disposable cutlery will be consumed. ABS and ASA are easily dissolved completely too, so that's just about every computer enclosure. Another material often used in enclosures is polycarbonate, is also affected by acetone, i think it's absorbed and causes stress cracking - the plastic weakens but does not dissolve, the result is entirely bizarre, it's eroded with a similar appearance to how water erodes stone over centuries, except it happens in minutes.
OK. I actually smacked my forehead reading that. You're right! Some plastics acetone will dissolve -- like ABS, PLA, PVC, polystyrene, and others it will not, like PTFE, polypropylene, HDPE. I'm not sure what Tupperware is made of, but I wouldn't be surprised if it's a proprietary (but food-grade*) blend. *After 2010. Before that BPA was used in Tupperware.
Hmm, after some research I realize that acetone shouldn't be poured down the drain, but rather collected and then given to your friendly local hazardous waste center. homeguides.sfgate.com/spent-acetone-hazardous-waste-79736.html
This is a how to restore video rather than a quick how-to screen swap on a Samsung phone. Why are you laughing over somebody being courteous enough to leave detailed instructions for a technically inclined lay-person, on top of doing the work to create the LCD itself? Your laughing sounds like insecurity; it's a very common thing. I think this is an excellent video even though I'll never put this data to use.
