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Very simply explained. It's only now I learn decibels are not a measurement unit of sound.

I just did my first perf board drone, i used cat6 wire. Esp32s3, mpu6050, npn controlled motors, and a 3.7v step up to 5v 2amp module i salvage from a walmart cell phone portable charger. It all works😊 but its a hot mess. I hope to get better.

Brilliant.

You... you... you've changed my life.

Nice technique! You are using a Weller, aren't you?

Very smart.

very nice circuit and probes... if i want to measure batteries internal resistance with this, the batteries above 5v would induce voltage back right? and if that happens so could we add 2 diodes on usb and ground to prevent it and not be concearned with polarity right?

I wrap 3 turns of 1mm solder around the end of the stripped wire. Now you can solder and fully tin it in one move

Great tip worked great. Thanks for sharing.

Seems to be genious! I will try this!!!❤

USB will not supply 5V with this circuit!

I've always held the wire between thumb and 3rd finger, and the solder between 1st & 2nd fingers. I can feed the solder into the joint with a bit of nimble finger work, but this method seems much better, will definitely give it a go.

This is a great tip! I actually made something almost identical but using thin brass strips with kapton tape separating them. It was rather fiddly to use though, your idea of using the adhesive copper tape is brilliant!

Its very cool🎉 but very bad🥲.. just tin the pad then tin the wire, add flux and solder the wire to the pad.. and make sure you have the concave shape,, not big blob of solder like that!

That brought back memories Richard. The punctuation mark that I remember was 0/3/8 for a comma. When you used them for programming it was recommended to add a sequence number to the card on the RHS. This was needed in case a tray of cards containing a program got dropped on the floor. You would then need to run the recovered pack through the sorter to get them back in the correct order.

😮

Brilliant!

this method is total genius! As a beginner I must try this out

This solution is quite crude looking due to the nature of the resistors used and the power supply voltage. If accuracy is desired (which should be for this miliohm meter) a higher tolerance resitors must be used. Otherwise a current sourcing circuit must be implemented with LM317T or similar device. Nonetheless great tutorial.

Thanks, excellent. What type/reference should we look for the Schottky diode?

Why do they pulse charge?

Like it. A useful test, generally fiddly to do, made easy. Elegant.

Nice idea. Thanks.

A thought to add... If the builder has a thin piece of double-clad copper board (the type used to etch a DIY PCB,) that might be a good material with which to make the probe. I am not speaking of perf board. That would not work, of course. HTH someone.

Very clever!

👍👍👍👍👍

Not bad, not bad, not sure if standard production method of tinning the pads and tinning the wire in a pot is faster or slower, should be on par. Frankly I avoid soldering wire to board at all - poke in or idc or lever operated connectors is still better.

The sense wires need to be down at the probe end, not back at the power supply end. These are not Kelvin probes. Preferably they will be on separate probes, but if you are close enough to the tip you will mostly get away with this.

so if i followed all your videos correctly the "best" design is this but with the wires soldered in the needle's eye, yes?

Thank you !

Ingenious!!!!

Simple and cheap, I like it.

On the offchance anyone sees this since this video was released a while ago What should I do if, when I plug the device in, the computer doesn't recognize it, so it just leaves me with the "please plug in the device" message?

Control Panel | Device Manager | Ports | (Top Menu) View Hidden Devices Uninstall each greyed-out USB jack icon. That clears out unused, but reserved COM ports. I have found this an annoying problem when connecting and reconnecting virtual COM port devices. Perhaps someone can write a script to do this.

Very useful. ! top hack Unk.!

Windows is stupid. It doesn't release ports when it should.

Thanks for the feedback. I made the video to import whole projects, but VSC has changed and the video needs a remake. I have a couple of other short videos to make first. Subscribe and click on the bell so you don't miss them.

Exactly what I was looking for, thank you! you mentioned at the end of the video that you would show us how to import entire projects into PlatformIO. I haven't done a deep search into your channel yet, but usually what happens is the RUclips algorithm will show that video, usually, as the top of the list of suggested videos. But I'm not seeing it. Just mentioning that in case there's a way on your end to help users find it - maybe some sort of keywords placed in the meta of the video to help find it.... All said, thank you for this video! Great help!

Excellent.I have wasted 8 plugs getting it wrong,each plug took about 5 minutes! But I tried to do it on the same way as you demenstrated so nicely.

Nice little series of videos - thx a lot ! Can you give a link to import whole Arduino projects - please ?

That was brilliant! So may sketches have "handle message arrived" now I know how to handle it.

I will try the extra capacitor. Thanks for the tip!

It says my HFE files are too big to import?

Wowww very well explained 🤙👏👏👏

It's not due to the inefficiency of the converter... It's due to the age and quality of the used cells. But yes, the marketing is, as usual, misleading. It does state the capacity at nominal cell voltage, which is usually considered to be 3.7V

I done the same test with different brands the best was a basic anker micro usb 10AH 2 usb came out at 9600MAH I had others come out at 8000 and 6800MAH but never this low. Some brands also state the rated vs the battery capacity. Like the cuktech no 30 is 40AH battery and rated as 22AH output.

If you went for a lower current, I would expect a higher efficiency. An efficiency of around 70 to 80% should be possible.

Excellent calm delivery. Explains facts rather than ranting about ripoffs.

Can you add auxillary in ?

Thats tops 👍 what type of speaker did you add? Where to buy parts? what is max capacity size of speaker ? I have floor standing speakers, can you also add a subwoofer?