#55 Cheap LCR ESR Transistor checker error and re program

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The Radio Shop

Күн бұрын

Пікірлер: 67

@hamradio3716 7 жыл бұрын

Very nicely done. Getting the programmer going was great. Thank you for sharing!

@TheRadioShop 7 жыл бұрын

Thank you for watching.

@mikesradiorepair 8 жыл бұрын

Great video on programming it. That is something I really need to study up on. So many things I could be doing with cheap MCU's I currently do old school.

@TheRadioShop 8 жыл бұрын

Thanks Mike. You can do things like ripping out these crappy pll from different radios and programming them like you want them to work. DDS VFO'S, New PLL's for Trams and Browning's, ect. Endless possibilities. Thanks for commenting.

@omsingharjit 3 жыл бұрын

Mine transistor tester is little different than yours mine doesn't have rotary encoder doesn't have frequency tester mine screen is blue some how mine stopped working while testing i had used 13 volt adaptor to powering it it never happened before but this time it gone by displaying blank screen with backlight when ever i push its button , i don't know if uC is gone or Lcd ? Its ic heating so i think uC gone . If this is the case i wanna replace the cheap but i need same code for same model can you please provide me the code for this version of transistor tester ?

@omsingharjit 3 жыл бұрын

Is it possible to pull code from Microcontroller ? If yes how ?

@TRXLab 8 жыл бұрын

very well done Buddy! Really good that you show this process. Thanks for sharing 73

@TheRadioShop 8 жыл бұрын

Thank you Peter. It was fun doing it my friend. Glad you liked it. 73

@stevejones8665 7 жыл бұрын

Good on ya mate Very well done and great Video...I found the Cheap Chinese Arduino Boards are good for learning about Atmega chips as they have a built in programmer and 386 chip on board....just plug in usb and away you go....Cheers Steve Liverpool UK

@TheRadioShop 7 жыл бұрын

Thanks Steve. I need to get an Arduino. Have not done that yet. One day

@pavanrebel9661 5 жыл бұрын

my program upload sucessfully but it was not showing nothing in lcd plse help bro

@larryk4mu240 8 жыл бұрын

Yes that was fun. I had a cat 500 first and still have a 1000 the predecessor to the 300. I also still have an Icom 22S, you remember those? Diode matrix for all 10 channels I think. Things change. I liked this video very much, sure, do more. Hey! if it is to do with radio or electronics I'm all ears. :D) Have a great vacation, you deserve it! 73

@TheRadioShop 8 жыл бұрын

Oh yes, I do remember those. Back in the late 80's there was an business band radio that was diode programmable for frequency. Sounded something like airtron or something. Been a while, they were a pain!. Anyway will be doing more future videos of this nature as times moves on. Glad you liked it.

@larryk4mu240 8 жыл бұрын

Hi Buddy, Glad you got it working. A little different from the normal video, but different is good, I liked it much. Maybe do some more like that. I have flashed chips to change the call sign on the repeater. Not done any of that in years. I guess it's time to start again. Good video Buddy. Have a great week. 73

@TheRadioShop 8 жыл бұрын

Thanks Larry. Yes my first repeaters used diode programming for the ID. Very easy. I later bought a Cat 300 controller. That was even easier. Went a bit out of my usual videos with this one. So will most likely do more on this line. This video seems to have done well. You have a great week also. I am off for 18 days after Friday :)

@supyrow 8 жыл бұрын

the resistors going to the zif socket is what is stopping the chip from being reprogrammed. (its pulling the chip pins low) after building this circuit from scratch, that was what prevented me from doing a successful rewrite. simply lifting the one side of the resistors should do the trick. good luck great video Buddy! 73!

@TheRadioShop 8 жыл бұрын

Thanks for that information Bobby. All helps. Was thinking about building my own also.have a good one my friend.

@supyrow 8 жыл бұрын

its a fun project, it was worth doing it, i was really surprised at the accuracy of the device.

@netdudeuk 8 жыл бұрын

This explains why you get that error message - blog.lincomatic.com/?p=1480

@TheRadioShop 8 жыл бұрын

Thanks for that link.

@danieldillon3103 6 жыл бұрын

I applaud your work here. Ain't even built mines yet, but when it blows a gasket will know where to go. Thankyou Very Much.

@TheRadioShop 6 жыл бұрын

Thanks Daniel. Good to know we can fix the software.

@whoisme678 7 жыл бұрын

Many on here are saying that once the chip gives errors in's of no use?? What you have shown is that the chip CAN be reprogrammed again. I had the thought, but just did not go ahead and try it. Well Done. if you surround yourself with the stuff your interested in, you have no choice but to learn.

@TheRadioShop 7 жыл бұрын

Hi John. Yes several said it could not be done. But we had already found it was not that difficult to do. Guys over at EEVBlog have worked wonders with the code on these. Thanks for commenting.

@whoisme678 7 жыл бұрын

Thanks for being one of the explorers and telling the rest of us.....: mwwwahhh I just binned some of these.!!!!

@komodo1138 7 жыл бұрын

Thank you very much, I built this one the other day and i had a corrupt atmeg328p. Now i just have to get a rotary encoder because it will not stay on without holding down the button.

@TheRadioShop 7 жыл бұрын

You are welcome. Seen a few others with bad encoders.

@komodo1138 7 жыл бұрын

After a bit of troubleshooting i found out that it was not the encoder that was bad but the led.

@SimpleEnough2k9 7 жыл бұрын

Did you test the frequency counter function ? My unit acts up weirdly in the 5.5KHz to 25KHz range. Quite often, the computed frequency, the time period or even both, are wrong. Even worse, at some frequencies the values are fine and one Hertz higher the returned values are wrong, go figure. This is happening with 3 different chips and 2 different function generators, so I'm lead to believe the problem is at the firmware level. For instance, with an amplitude of 1Vpp, square wave, try the 5960Hz and 6305Hz frequencies. The returned values should be fine, at least they are on my unit. One cycle higher, at 5961Hz and 6306Hz, the computed frequencies are simply out of bounds and by far !!!! At 15,17,18,19,21,22,23,24 and 25KHz, both the time periods and computed frequencies are wrong. Let me know if you can reproduce this problem.

@TheRadioShop 7 жыл бұрын

Will test more and see. Do not thing the results will be great though.

@SimpleEnough2k9 7 жыл бұрын

Thank you for taking the time to perform the test. By the way, when using the frequency counter, the value on the first line seems to be pretty much spot on. The values that are unreliable are the ones on the second and third lines, being the mean time period and the calculated frequency based on that value. Since the first value is based on the content of a counter and the returned value looks fairly accurate, I'd be lead to believe that the problem with the calculated values is a firmware issue and not a hardware one.

@TheRadioShop 7 жыл бұрын

Will be interesting to see how it does. I am going to order a few more of these to play around with. You just may be correct about the firmware.

@skfn 5 жыл бұрын

Nice job! You are giving me hope. I will give it a try. Mine stucks at "short probes" message. I found pin 1 shorted to 3. Following that i found the short coming from atmega328 pin 23 and 25. So i have ordered to day all the nessary tools to programme a new one and replace it. Thanks

@TheRadioShop 5 жыл бұрын

You can get them already programmed on eBay. Thanks for watching.

@skfn 5 жыл бұрын

@@TheRadioShop But they charge almost the price of a DIY kit (about 9 euros including shipping!) and In this case better to go for a full kit and keep the rest parts as spare. Cannot find a better price. Besides, It is good to learn. Thanks for your time.

@TheRadioShop 5 жыл бұрын

Yikes that is too expensive. Last ones I seen were like two bucks US. But that was several years ago. Buy the chip and learn to program it. Then you can keep it updated. Like you said, good learning experience.

@wadehicks9270 8 жыл бұрын

That's really cool thanks for sharing

@TheRadioShop 8 жыл бұрын

Thank you very much

@cr6925 6 жыл бұрын

Wow. I have the exact same tester as you and a v similar thing has happened to it. Thank you so much for the step by step instructions and taking the time to make this video. You Sir are a star!

@TheRadioShop 6 жыл бұрын

Thanks for the nice words Chris. Hope you get yours working right.

@cr6925 6 жыл бұрын

Just to follow up. I had somehow managed to damage the original Atmega chip, but following your instructions and with a new chip - it all worked. Thank you so much again :-) These little testers really are a marvel of engineering/software - especially given their ludicrously low price. :-D THANKS!!!!!

@gh778jk 7 жыл бұрын

You corrupter of microcontrollers you! Kisses! Paddy

@TheRadioShop 7 жыл бұрын

Love it!

@MrCarlsonsLab 8 жыл бұрын

Great job buddy!

@TheRadioShop 8 жыл бұрын

Thank you very much Paul :-)

@KlondikeMike 8 жыл бұрын

Good job. I haven't blown mine up yet, still going strong (surprise, surprise).

@TheRadioShop 8 жыл бұрын

He He, You day is coming :-)They all blow up sooner or later. I am now 2 for 3. At least two are working and I am still troubleshooting the third. hope to get it back running but think the atmega is fried.

@MickLBrad 7 жыл бұрын

Buddy, you've got more guts than a chitlin' wagon by tackling this project! I would have trashed the board and bought another one before I went through all of that. I could have done it when I was much younger and before developing high blood pressure and shaky hands among a multitude of other ailments that come with old age. I really enjoy watching your videos while I sit around waiting on the grim-reapper to drop in. 😨 Good luck in all your endeavors and THANK YOU so much for your the time and effort to produce these excellent videos. I've been a Ham almost 50 years and I was building homebrew radios 15 years before that, but I always learn something from watching you work! 73, de Mick Bradford - WB4LSS BTW, I bet many of your viewers haven't a clue what a "chitlin' wagon" is. 😂

@TheRadioShop 7 жыл бұрын

Hi Mick. Yes this was a new experience even for myself. But was something I wanted to learn how to do. Software is always changing for these units. Hate to order a new chip every time a new version comes out. So decided to sit down that day and figure it out. Glad I did. Now others can copy and move along. Also it was fun. Thanks for the bit of history. Keep the grim reaper away!Chitin wagon eh? We had a way to keep the neighbors from wanting any. We put whole kernel corn in ours he he. Thanks for the kind words my friend. Buddy

@MrMac5150 8 жыл бұрын

You Sir. are the best in the West.. Dave @ EEV wished he could be as good as you.

@TheRadioShop 8 жыл бұрын

Wow, what a very nice comment to say. I'm speechless :-)Thank you.

@MrMac5150 8 жыл бұрын

The Radio Shop Just keeping it real. Credit where credit is due.

@TheRadioShop 8 жыл бұрын

Thanks for the support. Hearing comments like this really gets me going to do better. Thank you, it is an honor.

@voltlog 8 жыл бұрын

nice to see you fixed the issue, congrats!

@TheRadioShop 8 жыл бұрын

Thanks. Was a learning experience.

@GrandsonofKong 8 жыл бұрын

LOL! That doorbell sound had me pause and get up to check my front door...very realistic! Good job sticking with it and getting it repaired! any would just give it a toss in the nearest trash can! You are right there is awesome help available on the Blogs too.

@TheRadioShop 8 жыл бұрын

LOL, I do not know how many times folks in the shop look at the door and say someone is here. At times I ask "you mind getting the door?" Get a kick out of every time :) I like saving stuff from the trash.

@IamDerick 7 жыл бұрын

The average tech would have chucked it and got a new one. Hats off to ya! I love these Arduino boards they make so many things possible. Use them at work to make in shop test jigs. Great video your production skills have improved. 73

@TheRadioShop 7 жыл бұрын

That is very true. But now with this information on the internet not only can folks reprogram their faulty chip they can also upgrade to newer version on software. At the time I posted this there was no tutorial on how to program these. Thanks for the kind words on the production skills. Been a big learning curve along the way.