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Thanks a lot for the video. Turning the end stub worked in my case where the lift was stuck in the down, compressed position, but something else has happened - the chrome cover tube of the top section of the lift has separated from the top section and has stayed wedged deep down in the lower section, which is attached to the legs of the chair. I’ve removed the top section of the lift (which contains the gas strut) from the legs and sprayed down around the chrome cover with WD40. Any hints for removing the stuck chrome section, and how do I stick the chrome section back to the upper section? If its come off once it might come off again. If I leave it as is, the seat wobbles around too much as the chrome cover acts like a sleeve. I suspect one of the reasons the lift was stuck was that the chrome cover was stuck in the lower section, freezing the gas lift.

Thank you very much i had the same problem now i can fix it my self

Great resource in case I need to redo the electronics on some dead midi controllers I just bought

Thanks for this demonstration to repair the up/down mechanism of the Desk Chair

Thank you ! I will be visiting 1st time from abroad, no transport to go shopping, this takes away some concerns and will my trip more enjoyable. Good man !

thanks for sharing actually im Avionics License Engineer and never fix my own headset before so your tutorial is so helpfully but you didn't show us the wiring diagram sir, it's important i think to prevent wrong soldering

I do like the Monty Python introduction at the start.

Hey David, That looks very delicious and healthy. Good one 😊

Excellent video, I was wondering if there was a way to ask more detailed questions of you.

If I were attending the party, there is no way that would serve 20 people. I love good pasta salad and I could eat a third of that bowl all by myself 😊.

I'm not a macaroni salad person but that looks great! Great video! I'll have to try (a smaller) batch some day!

sweet

Has anyone replaced the Flash Tube Found this exact same one? Got it at the swapmeet, didn't check it. Got home and found out the bulb was burnt. I've been looking for a replacement no luck. The closest I've gotten is this one. The darn thing is in very good condition, hate to take it back to the guy if it can't be fixed. Thanks.

That must be a Hon chair. Mine has given me as difficult a time to get off as yours. A half hour job became a job that has sat there for months. I’ve tried pipe wrenches, etc. I appreciate your video. - very helpful. I’m also going to check out the other video you’ve mentioned above.

Flipping my chair over fixed it instantly for some reason. Going to leave it like that overnight for the best result! Thank you for the video!

I tried his advice...it worked! Thx!

I'm running Kubuntu Linux, though I do have a copy of Windows 10 installed inside of a VM running on Linux. I'd like to be able to build code for the RP2040 using the Eclipse IDE as I have a JLink debugger that supports the SWD interface on the Pico. I know that you can make use of a RPi with open OCD to debug the Pico, and open OCD also works with the JLink. I have used that to burn a bootloader onto a SAMD21 processor.

I haven't used assembly language much since I started programming microcontrollers in C. The GNU GCC family of compilers support the AVR series micro controllers, as well as many (if not all) variants of the ARM family. However, before I started working with micro controllers, I did a lot of work as a software engineer writing code for embedded 8086 family processors. Once such project was for a four port serial communications co-processor board used in a PC based user access point in a Coulter blood counter. I had a choice of programming it using C, Pascal, PLM, ADA (don't ask!), or assembler. I decided to write the code in assembler, not trusting the ability of the available compilers to give me enough control of the hardware. It was actually easy to write, and the 8086 itself has features that enabled me to divide the program into separate tasks for each of the serial channels. BTW, the processor was actually an 80188, but that chip is nothing more than an embedded variant of the 8086 with an 8 bit data bus and built in support chip functions. As far as the processor is concerned, there is NO difference between machine language and assembler. When writing machine code, YOU are the assembler. Assembler code is nothing more than a human readable form of machine code, and having the computer do all the heavy lifting of getting that code into binary format CORRECTLY. I've often looked at the assembler code generated by a C compiler, and realized I could almost always tweek it to remove extra lines of code, or rearrange things so it would run faster. It seems the compiler wants to move data from memory into registers, operate on the data, and then put all the results back into memory, even though it will be reloading the same registers with the same memory for the next high level language instruction! Of course there are compiler command line options that will enable optimizations that will notice these things, at the expense of longer compile times. Still, the assembly language programmer can often see outside the box that the compiler designers have limited themselves to, compilers seem to be based on a set of macros that can be strung together to translate various high level sequences into assembler routines. There is also the issue of memory usage vs speed. I once had to write a bit of code that HAD to complete in a small amount of time. I ended up writing a number of macros that were recursively called by other macros in several levels. A few small lines of assembly code took nearly an hour to assemble and produced a huge amount of binary image! It was fast, because it was all straight line code, NO SUBROUTINES! From the assembler macro point of view, it was a mess of nested routines however. Perhaps a gross example, but assembler gives you that option!

can anybody help me trouble shoot? my buttons gives power to the motor and the motor continues to make a small click sound if I keep the switches pressed, where do start to trouble shoot?

this is what I was looking for, awesome.

Nice to see the TIM get some coverage, it isn't often talked about beyond cursory mentions as more of a historical footnote. Thank you for showing us one in action!

Our n300 lights but there us a strong smell inside our camper. What is causing this? 6:26

Maybe I’ve missed something, but what does the 0x100 appended to each on/off message actually do? I can’t find a reference to it elsewhere. Thanks for any help!

65 missed calls...

Great work, thank you.

Hey Dave. I was attempting this wd40 fix and unfortunately it didn't work. I stumbled upon your video where you explained HOW the pressure worked. Mine is too low and dropped. You explained it so well @ 4:10 . I guess i have to get a new chair, but I really do appreciate the knowledge and explanation. Thank you!

After a weekend with the cylinder lowered and the chair upside down the chair seems to be fixed. Thank you very much!

Dang man you out here saving people money thank you.

Thank you David. We can use for example raspberry pico for object detection in real time. For example we use PIO to transfer data between camera and one core of raspberry pico pico and the other core well be used to run machine learning Model. Is that feasible??

This video was very informative. But more than that, I loved the early late 80's - early 90's aesthetic of it. The intonation of the narration, the music, and the general instructional video quality of it, absolutely perfect.

Thank You. You are the best. This might be exactly what i need for my hand held text radio.

Hardest part is getting the battery cable hole on that little nipple.

thank you david. When I use SM_CLK_FREQ=10,000 Hz, I get a distorted sine waveform. When I increase it to 125 MHz, I get an undistorted sine waveform. Could you please explain why this happens? knowing that in my case I did not add the capacitor and the amplifier.

Great series! I am trying to understand a program that I found that uses IO_IRQ_BANK0 and I am not understanding. It seems to different and maybe powerful but why someone would use it is not clear. Any help or pointers to info would be greatly appreciated.

So what exactly was the problem? TY David

I just completed a DIY level shifting construct between a GPS and an M5Stack device/MMBasic Pico. I'm not sure about the raw data yet. I use another GPS with success on both, but I need a better quality on speed/positioning (speedometer idea) for something. The way I made it can test other GPS units, so I'm pleased. It's something like 10 jumper wires and whatnot with a lot of thinking. Without a lot of videos to watch it would not work for me.

I took a short piece of PVC pipe, cut it in half length ways, and then clamped it over the chair's cylinder with a couple of hose clamps. ( I guess a couple of black zip ties would have been a bit more inconspicuous. ) I had to trim the length a couple of times but now my chair is mechanically fixed and nothing had to be disassembled / reassembled and no oil dripping on the floor.

what do i do if it doesn’t go up or down? just got a new leather office chair from a garage sale, everything works except the up & down, when i try to move the pedal to make it go up or down, it just wiggles a bit, but doesn’t let me move the pedal, hence not letting me the chair go up or down

Thank you SO MUCH for this video. I lost my job recently and there was no way I could afford a new chair or even a replacement valve, I tried this out and it worked like a charm

Hi David. I have watched and enjoyed all of your RP2040 related content, so thank you very much for that. My only suggestion would be to treat yourself to a $12 Raspberry Pi Debug Probe. I find that using it to program the Pico's RP2040 much more efficient than copying UF2 files, and it frees up the Pico's USB port. The Debug Probe also provides a UART serial port, so it needn't take up an additional USB port on your PC.

Keep up the great stuff David. These deep dives are gold.

I'm your biggest fan this stuff is amazing this is exactly what I needed

Thank you so much , it helped

What a fascinating device, especially for being made mostly from plastic!

Hello, love the series, just wanted to ask, whether you are planning to release a video on debugging using another pico or the debug probe without the SDK. Tried to find it somewhere on the internet but to no avail.. wondering whether it is even possible though. :(

thank you david. i have a project real time signal processing(audio) with pio and DAC 8 bits. can you suggest me what can i do please

Hello David! Have you ever replaced the igniter on your N300 refrigerator? If so, do you have a video on how to do it? I can't find anything on UA-cam that explains how to do this. Thanks

I had one when I was 12. I live in Australia and saw them advertised on the back of an American comic book and thought there was no way to get one here way back in the 60's until a school friend told me a store in the city was importing them. I begged my dad to buy me one and it set me up, literally, for the rest of my life, becoming an engineer and specialising in software engineering my whole working life. Unfortunately I got rid of it when I thought my Apple II would be all I would ever need... And I have regretted that decision ever since. Several years ago I decided to write a simulator for the Digicomp I on a windows PC. I was surprised that I could remember exactly how it worked and had the program running old Digicomp I programs perfectly.

Great video, didn't expect to find one so detailed as there's not much info on the subject. Mine has a different problem, quite the opposite of what you usually see: i like to actually keep it low, but everytime i leave it alone it springs back to the maximum extended position. What do you think about that?

Hi David .. I used the method by just turning it upside down. I left it over night. I used my whole body weight on the seat to bring the chair down. It worked!!! I did it this way cause I don't have the strength to use my hands. Thank you so much for your video 😊.