Episode 1631 Chinese Kit Time pretty basic Be a Patron: / imsaiguy
Пікірлер: 82
@tedivester494710 ай бұрын
First job out of college was in a small startup firm in Napa, California. We had just come out with a piece of equipment that nurses could use to test power cord integrity of patient equipment. The R&D engineer thought that we didn't need a tech writer so he wrote the instruction manual. I had a friend who was a nurse so I took the equipment along with the operating instructions for her to review. It made no sense to her. I explained what the equipment was supposed to do, so she spent several hours rewriting the instructions in nursing language. Took it back Monday and showed our engineer. He was somewhat offended but the instruction manual, written in Nurse, was accepted. It's hard to believe that engineers do have limitations.
@IMSAIGuy10 ай бұрын
I might be headed for the State Hospital in the future 😮
@MrVosh-nj2lc10 ай бұрын
When I was an industrial chemist I was responsible for developing chemical process test methods and then writing the test method to be used by technicians running the test. I quickly learned the best way to do this is to first write up the method in your office. Then take your "perfectly understood" edition to the technician's lab, and with his assistance, edit your "perfect" method so that it could be practically understood and performed by the techs.
@frednitney583110 ай бұрын
@@IMSAIGuyGosh, I hope not!
@RonDogInTheHouse10 ай бұрын
Oh, how we've fallen, "I have to share my lab with a washing machine". Funny I share my workbench with the furnace and hot water heater!
@user-eg3yv3xr7s10 ай бұрын
Interesting that you should mention " tech writers ", after my dad retired from the U.S. Army, he got a job working as a Technical Writer/ Editor working for the gov't. He wrote and illustrated technical manuals for many different pieces of electronic equipment for many years.
@robinbrowne541910 ай бұрын
Hmm.. An almost useless function generator. But, as you say, it would be instructive for a beginner. And also makes a fun video for you to post on KZfaq. Thanks :-) PS - Your channel reminds me a bit of the WolfePit channel. You build all these weird kits so WE, THE PEOPLE 👈 don't have to. PPS - Don't be too disappointed that not everyone supports you on Patreon. Many people have just enough money to pay the rent, etc. And making these videos is probably an artform, which is its own reward. And they really are awesome 👍👍
@peterhemmings292910 ай бұрын
As a cheapskate, I looked at various options for a function generator. Easy to knock up something specific for a project - a 555 / colpitts / something else, possibly with some control. E.g. my last one was a 1 kHz square wave generator with variable duty cycle. If you want an actual flexible generator, you'll be wasting a lot of time if you don't just get a cheapo fy6900
@frednitney583110 ай бұрын
Possibly of interest: The legendary -- and soon to be going out of business, horrors! -- electronics surplus mail order business Fair Radio Sales of Ohio still has in stock ASC-583-B signal generator kits. Enclosure, switches, and miscellany are not included. I have not assembled or examined mine yet, but I can't imagine it not being better. It's $5 plus shipping and non-included parts. (Then again, if it isn't better, the used/checked Tek branded function generator I also bought should suffice. ;-)
@uni-byte10 ай бұрын
Might work a bit better with Q2 in the other way around. Also, if C5 was 4.7uF or 10uF the square wave would look a bunch better.
@W1RMD10 ай бұрын
This would be interesting to build on experimenter bread board were you can easily swap the components and test the results.
@tfrerich10 ай бұрын
Of course you are in the garage. You're following the tradition of Mr. Hewlett and Mr. Packard. I wonder if they had a Maytag tub washer in their workspace?
@frankowalker466210 ай бұрын
Nice kit. The Sawtooth has the best output.
@reedreamer951810 ай бұрын
That was a good laugh at the beginning. Obviously been watching Steve.
@nickcaruso10 ай бұрын
At Teradyne we had a tech writer with a PhD in English who specialized in Shakespeare.
@IMSAIGuy10 ай бұрын
I'd love to read a Shakespearean style datasheet!
@nickcaruso10 ай бұрын
when a man is tired of old oscilliscopes, he is tired of Paris. Or something like that.
@herbertsusmann98610 ай бұрын
"Pining for the fjords". Must be an old time Monty Python fan! " It's spelled Raymond Luxury Yacht but it's pronounced Throat Wobbler Mangrove"
@IMSAIGuy10 ай бұрын
I wanted to be on television, but KZfaq will have to do.
@1shARyn310 ай бұрын
For your next bit of entertainment, switch to building a mechanical device and put a twist drill bit thru your finger. (Don't ask me how I know)
@kveldulfpride10 ай бұрын
Thanks for the content. Hopefully one day i can make my foray into circuit land (coming from network/voip). Maybe i can try my hand at building my own NIC and a dumb protocol for it.
@KJ6EAD10 ай бұрын
I haven't seen this circuit before. I've made the op amp-based one that often was called MK103 and had the advantage of three simultaneous waveform outputs. Then there's the ASIC-based function generator kits that seem good except for poor amplitude flatness.
@electrosheeps671810 ай бұрын
Love that stories 😁
@davidv128910 ай бұрын
Asks us to be Patreons then tells us he has an air conditioned garage. Now that's marketing 😂 Thank you for another interesting video. Regards, David
@IMSAIGuy10 ай бұрын
an used portable craigslist air conditioner, it's not the Ritz 😎
@davidv128910 ай бұрын
@@IMSAIGuy Yes, just joking, love your channel!
@T-Tronix10 ай бұрын
It only a single frequency as the sign and triangle wave would not work correctly if it was variable. 😮
@jagmarc10 ай бұрын
The sine wave wi
@jj74qformerlyjailbreak310 ай бұрын
I never had luck with these Diy module kits. I think I ordered like 5 for $2. They do function but low low amplitude. They need a buffered output.
@W1RMD8 ай бұрын
Try 2n3904's or better yet 2n5088's transistors with higher hfe than the 9013's that are in this circuit. I don't know how they will work, but the hfe is pretty low on a 9013.
@romancharak367510 ай бұрын
I hope Amy watches this video !
@ivolol10 ай бұрын
Get this *out* onto a tray 🤣🤣
@billywallace136010 ай бұрын
Was transistor Q2 in the right way around? The outline on the circuit board seemed to go the other way.
@frankowalker466210 ай бұрын
Well spotted, I think you are right.
@andymouse10 ай бұрын
The nasty square wave down to Q2 being in the wrong way ?....cheers.
@IanScottJohnston10 ай бұрын
I thought you were going to say Amy was Steve Jobs personal tech writer or something.......erm, wasn't expecting!
@herbertsusmann98610 ай бұрын
That Q2 transistor definitely looks like it's in backwards.
@KJ6EAD10 ай бұрын
Yes, I also noticed that, at least if the silkscreen means anything and wondered if the circuit function was affected.
@ke9tv10 ай бұрын
You don't know how many times I shouted at the screen about the backward transistor! Is the siklscreen backward, or does the circuit work with the transistor reverse-active biased?
@jj74qformerlyjailbreak310 ай бұрын
I like donated Old Oscilloscopes.
@georgesampson471410 ай бұрын
Yeah, you have to watch out for those eccentric people because in reality they may be the normal ones and the rest of us may be the abnormals.
@caulktel10 ай бұрын
I think the waveforms would look a lot better if you threw those crappy caps in the bin and replaced them with something better.
@richardockman830310 ай бұрын
H.P. Started in a garage.😀
@charlesnelson6199 ай бұрын
How did the waveforms look after turning Q2 around ?
@garyramsey427510 ай бұрын
Chinese kit time was okay. Enjoyed story time more, though.
@farhadsaberi10 ай бұрын
No resistor between output and C4? Must be over spec at T=0. Leave it running for a long time and see if the 555 breaks 🙂
@bartonstano932710 ай бұрын
IMSAI guy -> where did you buy the kit? how much was the kit? For a hobbyist like me this migt be a great kit, except I would want some thing with adjustable frequency.
what really kills me, I could not re-ship that item to a friend for $3.
@KJ6EAD10 ай бұрын
@@IMSAIGuy The treaty that allows China to ship cheap junk worldwide at US taxpayer expense but doesn't allow domestic companies the same opportunity is fundamentally unfair and wrong. The only effective way I've found to recoup the expense is to buy the cheap junk I want directly from Chinese suppliers, bypassing as many middlemen as possible. I hate buying from AliExpress but I'll be damned if I'm going to buy the exact same item at Walmart for three times the price.
@jagmarc10 ай бұрын
Clever how the sinew
@paulperano923610 ай бұрын
eeeerr is ticking your finger a requirement for level/grade 3 soldering ? As for sharing my 'lab' with a washing machine ... In my dreams.
@kwazar672510 ай бұрын
Lol. Amy also used ne555 oscillators
@davidknightaudio93410 ай бұрын
huh?
@davidknightaudio93410 ай бұрын
amy?
@kwazar672510 ай бұрын
@@davidknightaudio934 the temp tech writer who sold xxx toys
@jj74qformerlyjailbreak310 ай бұрын
Amy used the 556.
@andymouse10 ай бұрын
She liked a good buffering !
@W1RMD10 ай бұрын
I'm curious how this would compare with a Weinbridge oscillator distortion wise. I've built the Weinbridge oscillator with a 12 volt 1 watt Xmas light bulb and 072 op amp and it's amazing clean it is but I don't have a distortion analyzer to verify, just a scope. "Mr. Carlson" has a specific bulb he uses with extremely low distortion, but I'm not that fussy. Has anyone here tested both of these oscillators and done a comparison with a distortion analyzer?
As you are an optics guy, can you see the iphone 15 teardown of JerryRigEverything and please explain what in the world is that tetraprism thing. Maybe make an video about it?
@IMSAIGuy10 ай бұрын
just a prism to bounce the light a couple of times to save space, same idea used in binoculars so they are short
@bayareapianist10 ай бұрын
@@IMSAIGuyI think the main reason to use prism in binoculars is to make the images right side up. No need to do so in digital cameras because d cameras can be rotated and place 180 degree wrt images.
@DavidJohnstone-hi9kr10 ай бұрын
How about providing a link for this cute little kit?
@IMSAIGuy10 ай бұрын
read down the comment, I gave a link
@DavidJohnstone-hi9kr10 ай бұрын
I'm not seeing it anywhere. Even read all the comments.@@IMSAIGuy
@DavidJohnstone-hi9kr10 ай бұрын
Got it! It was in a reply to a comment. Yup, I started reading all the replies.
@PatientZiro10 ай бұрын
That sex toys story 🤣🤣🤣 Does your solder wire contains flux? Do you even use flux?
@IMSAIGuy10 ай бұрын
yes the solder is has a flux core. I do you flux for SMD and corroded parts.
@MaxPivovarov10 ай бұрын
You made mistake with Q2!
@SergiuCosminViorel10 ай бұрын
Am not a fun of 555. I studied electronics, in the faculty, and i had such a project, made all with AOs. That is a real functions generator! ah, it also had a 565. not 555! back then, Romania was producing those ICs. Then communism fell, and the ICs that were pruduced in Romania, they are still produced today, and the price starts from 25 USD per piece, and it goes up. While we produced those, the price was 10 cents per piece. Then Romania was reformed at requests from IMF, and divisions of Western specialists.
@nickcaruso10 ай бұрын
au contraire, mon frere -resistance is highly effective
@a3b36a0410 ай бұрын
I share my toilet with chem lab.
@IMSAIGuy10 ай бұрын
don't touch the handle 😎
@GeorgeGraves10 ай бұрын
This is SO MUCH better than #eevblog
@KJ6EAD10 ай бұрын
In some ways certainly, but I find EEVBlah useful also.
@GeorgeGraves10 ай бұрын
@@KJ6EAD Sure - scope reviews and such. He's given a lot of gear to test. But now-a-days, it seems to be just on-air live hang out so he can get his ego stroked by his fans.
@philiphoeffer744210 ай бұрын
Looks like Q2 is backwards.
@mr1enrollment10 ай бұрын
Just a note of feedback: when you say "everyone likes Chinese kits" or "everyone likes chip of the day", that is not exactly accurate. Personally I enjoy the more sophisticated instrumentation applications. But the reviews of radios, chips, kits, not so much. Good job on the multistage wide bandwidth amp demo - that is instructive. Anyway - my two cents. Cheers D