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I cut the corner with side cutters and carefully removed the metal base over the die once the edge was exposed

It just has date format in month and day of month.

@adriansmith31 Yes, I did work it out after a while. You have to set the year and then the date. Then, it automatically goes to the correct day of the week. Cheers 👍

I'd say it's OK for that size room. I have mine around 10 feet away

Yeah I have a cupboard full of old junk which I can no longer fit anything into. So there's bits of electronics junk all over the house. I'm going to have to sell some of it off I think.

Sounds a good hacking project. Hardware wise easy enough but I'd be stumped with the firmware

@@adriansmith31 At least there are modern (ish) compilers that can emit M68k code. Still it would be a bit of work.

They go under the IC sockets and around the IC itself.

Only way I can reverse engineer it. This isn't getting scrapped, I'm trying to get it working

This was state of the art indeed. In the 1980s. Today all of this would be three chips: one for the SoC (whether FPGA-based or hard), one flash, one transceiver - and power supplies. Put another way: a $6 Rapsberry Pico 1 does all this thing does, in a tiny fraction of size, weight, and power consumption (less transceivers of course).

I was wondering what that HHU port was for. I assumed it plugged into the user port. There's 3 serial interfaces on this device, I presume one goes to the HHU port. Those power pins I thought were inputs may be output power for the display. I'll have a play around with it when I power it up.

My friend bought the two that were available. I'm keeping an eye out for the display and keyboard unit that goes with it. I will do another video where I will power it up and see what's on the serial ports but I don't think I will get anything meaningful. If not Ill dump the EEPROMS in this unit like I did with the other one.

It's a CCTV network video recorder. A cheap Chinese unbranded unit that needed a phone app to set up which is no longer available.

Nice!

Yes I have some schematics but there are several pcb revisions. Schematics didn't quite match mine (smt components instead of through hole and different amplifier circuits) but they might match yours. If you look on my about page there is contact information where you can email me. Or I can upload them to one drive and share them. Will be tonight when I'm home from work though.

@@adriansmith31 Thanks Adrian. Have dropped a note on your About page.

OK I'll sort it tonight

I went by average sale price on ebay at the time. But yeah, it's worth nowhere near that now.

Looks like it's a cheaper version with only one trace and 6mhz bandwidth. Might still work but I wouldn't spend a lot of time on it if it needs repair or refurbishment

@@adriansmith31 ah okay, thanks for the reply 👍

They are standard bnc connectors

If touch drivers don't work in your version it's unlikely an older build will. An external keyboard and mouse via a hub should work though. The other option is to update the bios first if possible. I can't remember exactly where i found an old build of windows 10, think I had it on an old USB stick I had lying round. Edit: rufus installer tool includes scripts to download an older Windows iso. Note that the latest version of rufus only allows installation of the latest version. So again you need to get an older version of rufus.

It's because of the side effects (incontinence) and infertility plus other problems. Got to weigh up the pros and cons of all options. Whilst it's non aggressive it might be best to leave it and see. But it depends on what the specialist says in a few weeks.

@@adriansmith31 That's understandable, and I hope everything goes well on both fronts; TH-cam as a side hobby and your health. I wish you the best of luck! And I look forward to more of your videos and shorts (that I've been watching more and more of while I've had time today.. Haha). I love seeing this type of random content, and I'm sure others do too, and YT is just not promoting your content, yet. TH-cam is so strange with how they promote channels anymore, who knows what is going on. I've watched so many channels that started with as many views as you that blew up for no reason or anything that have similar styles to yours and upload cycles, etc. I wouldn't be discouraged by things you've tried not seeing results immediately. Just have fun with it!

It's fixed 24 hours. Will need code changing to support 12 hours.

Yes you still have to select I do not have internet unless the person you are selling to has a Microsoft account

Yeah I can imagine. That bit of paper costs so much that some old avionics are just scrapped rather than being repaired or recertified

It's not wrong info. This worked on the laptop I was showing in the video. It might not work for other brands but it definitely did on this. Look at the other comments. People have tried it and it worked for them.

@@adriansmith31 ive tried in Lenovo T490s, T470s, T14 Gen 2. nothing works. but its ok, i have my method that works 100% on any laptop.

@@adriansmith31 i think this only works when the machine been removed from that organization account itself and what remains are the left over data inside. But for those still inside the corporate account, still cannot remove. what is the exact model of that laptop you are using? x1 carbon 3 or 4?

Ah that would make sense that mine has been removed from the organisation account and some haven't. I no longer have the machine unfortunately as it was sold on. It was an 8th generation processor if I remember correctly if that gives some idea of the version.

So you did to make it work?​ @@BabyQwerty0620

What brand of laptop is it? I'm going to try it on a Dell tomorrow if I get time.

try clear it many times. disable security chip.. but this method is temporary. the next time you fresh install, it will go to welcome bla bla bla..

Hi, no I never found a fix for it. Replaced with a better router and destroyed the problematic one.

@@adriansmith31 damn, thanks dude

A lot of avionics are really old designs with the notion of if it ain't broke don't fix it. Chances are that was designed before the 486 came out

It runs off 115v 400hz standard aircraft voltage so can't power it up easily

I was given these boards but I was told they were from the Thrust Modulation Unit when I asked the seller. At least I now know what they came from.

Thanks for that, I suspected it was used in the SU27 but couldn't see it on cockpit photos. I'll try and find some now I have some other aircraft examples.

@@adriansmith31 thank you

Not sure it's a while since I did the windows install. I haven't updated the bios on mine since.

Thanks, I used davinci resolve's audio level normaliser on the TH-cam setting. I'll bear it in mind if it's too quiet and increase it. Not sure why it sounded clipped could be something to do with the audio post processing.

Thanks, it's hard reverse engineering things like this. The hardest was the eifs display due to the multi board construction. TH-cam seems to be not recommending my videos all of a sudden. New videos get views for a few days then drop off to practically zero. Got a few more to post yet but aiming for once every week or two.

Cool, I wondered how that thing worked. Other hours counters I've seen simply displayed numbers.

@@adriansmith31 You can find them in old Sony broadcast cameras from the 80's - 90"s era they almost always have one. Those hour meters can be reset to zero by flowing a current in the reverse direction, as long as the index thing has not reached the end of the glass tube and still have mercury on both sides.

Good to know, thanks. I actually do still have a camcorder from the 80s and it still works. Not pulled it apart though.

Yeah, that's one of my older videos which were a bit crappy. I've improved since then :) also got a better camera

Good to hear it worked out OK 👍

It was supplied from a bench PSU so regulation should have been OK. I think it was due to the timings as per the datasheet you mentioned above. This technique works with eproms aparrently- there's a youtube video on it but eproms don't have multi purpose pins like the microcontroller

Sounds cool. Yeah it is basically a glorified multimeter which probably cost an absolute fortune when new. I was going to use the case myself for a project but it was too large. Sold it on ebay in the end.

It looks like the latter, a square wave formed into a sine wave through some capacitors, resistors and inductors.

@@adriansmith31 Thanks a lot! Seems to be the same topology i've seen in the Avionic Instruments 1A250 type unit, but your unit is much more modern with CMOS/TTL control logic. The 1A250 type unit i mentioned is built with discrete transistor based control, logic gates, comparators, oscillator 😁

The static inverters show up on ebay from time to time but are always untested and overpriced. The diode in this unit that's shorted is across the dc input backwards so it's providing rudimentary reverse polarity protection. I suspect the 28V input has been connected with the wrong polarity. Simplest type of inverter is a dc motor driving an ac generator. There's a working, tested one on ebay uk at the moment. If I can't get the inverter working I might try salvaging the transformer and making my own driver circuit.

​@@adriansmith31 Your reasoning for the fault makes sense. That explains the failure cascade. It's also possible that some of the control logic is damaged as well, which would make it beyond reason to repair. I wonder how viable it would be to start with a decently powerful Class D audio amp, and use the transformer from this inverter unit to boost the output voltage? That's kind of why I mentioned the topology of my big power supply (which is specifically made for avionics work), since it could be replicated in a simpler form - especially if it's only one phase. Indeed, the rotary inverters were the first types ever made. I've never considered them since they're fairly inefficient and quite loud. Sometimes, instead of eBay, approaching aircraft repair/overhaul companies directly can yield results. They often have parts in stock that they're looking to get rid of (past certification / no planned use etc) and you can sometimes make deals with them. I've done that before myself for companies in the US. The trick is to make it easy for them to perform the transaction with you, such as supplying a FedEx account number for shipping, using freight forwarding so that they themselves don't need fill out international paperwork etc. Otherwise, it wouldn't be worth their time to do a small transaction with an individual. I've found staff at those companies to very reasonable to be honest.

Yeah it did cross my mind some of the control logic is busted as well. I haven't ordered any parts for it yet but I'm inclined to not bother as it's probably beyond economic repair. A future project using a class D amplifier and 400hz tone generator sounds a better idea. That will likely be a long time off. I did contact some aircraft salvage companies but they said almost everything gets resold. They had some old radios but wanted extortionate prices for them. A relative used to work for an aircraft scrap facility in Wales but that was a long time ago. He more or less said the same thing and they generally don't sell to the public except for sale to auction houses by the pallet load.

@@adriansmith31 I'm curious to try the same idea (Class D amp). Much of the cost would be in the output transformer (that can work at 400Hz) and filtering if applicable. Good luck whenever you get around to that! I can imagine that your "luck" with aviation companies would depend greatly on location, their workload and various other circumstances. Indeed, pricing for uncertified/broken equipment can be exorbitant - for cases like that, I believe that they assume that the buyer would send the item to a certified repair facility that would fix and re-certify it for use, hence their asking prices. However, some companies won't say no to easy money and a quick transaction. It seems to vary quite a bit.