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thank you for posting this video. i have a similar quick read thermometer that stopped working. your video helped me open the case without damaging it. the broken wire is fixed and it's working again... from one daft old man to another 😉

i did the same but please note the bms u are using is max rated at 1amp...the tool goes up to three when under load so it wont last 😞

What was the load? Voltage alone doesn't mean very much. If you can pull 100 amps at 5v then that's 500w. Which is better than 12v at only 40a. But I can just about tell you what the problem is. It is your rotor disks being steel, unlaminated, and in no way optimized for use in an alternator. And well, the magnets could have been bigger and stronger, yeah. Okay so maybe not particularly practical or even cost effective, but that's cool, you did something instead of just talking about it and dreaming big dreams.

Why not just pull one of the pole pieces off and put a single big ring magnet right where the old rotor coil was? You would have essentially the same device as before, except instead of producing the field with a single electromagnet, you produce the field with a single permanent magnet. You might have to stack multiple ring magnets, and maybe make a bushing if the shaft is too small, no biggie. Of course then you would also have a pretty cool DIY PMAC motor, if you provide a controller and a means of commutation such as hall effect sensors.

Well done

Hi Dom great video, may I ask what gas are you using with the mig welder? Oh and also, do you not get burnt with no gloves on? Keep up the great work 🤙🏼🇦🇺

Thank you for this excellent video! Would it be possible to share with us the values of these two components or an approximation? Cheers!

Did you try to put a resistor 300ohms between the green standby wire and black neg in the plug..? Never mind, might pay to watch the whole video before making a stupid comment.. yep I’m an idiot.. keep up the great work 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

I think you had a shorted turn? As that might get hot when the magnetic fields are changing, but won't show up doing a resistance test. You could try an inductive ring test as this will normally show up shorted turns in a transformer.

Quick question, what the taps you are using, please 🤙🏼

Try putting heat shrink over the clips, they hold the work better, and without any marring marks. 🤙🏼

Invest in a spot welding machine, far less heat going into the batteries, means a longer life, just a suggestion DOM.

Toss it in the bin

Just put a speaker magnet inside the rotor

For what its worth. You should have just taken the electromagnet out of the rotor and put a speaker magnet in there with a hole already in the middle..

Try only 10 magnets evenly spaced

I think you should try 10 magnets 4 north at 12-6-3-9 o'clock and the rest south.. that's how it works out in my head. That's how I would do it. But that's just my opinion 😊

¡Muy buen video!! Déjame comprender esto: ¿conectas B+/- a la batería, y dejas libres las conexiones OUT+/-? El motor se conecta directo a la batería? Ningún diodo desde la fuente al INPUT+? Gracias por tu excelente trabajo!!!

No no no, never solder any Lipo batteries of any shape or size, as you well probably already know, the heat of a soldering iron, makes them very susceptible to fail, or even burn your house down, if it’s only for one battery, I recommend you purchase a spot welding machine/kit, you will have a lot more times to use it, it will pay for itself in no time, and not burn your house down, longevity of the tool will be greater, just saying old mate.. 🤙🏼 On another note, your using pz bits instead of ph bits, that’s why they keep chewing out the bits or the screw head..

I can see the WEEE bin's tears from here. 🙂

You are ever resourceful. Another great job done.

You are engineer or something ? Thank you.

should have just replaced the battery when you had it de-soldered and saved yourself some bother..

Just a quick question cobber, the pick with the magnet in the bottom, did you make that, or can it be brought? Cheers Great video mate, keep up the great work mate. 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

Doing a swell job with the videos buddy, just a tiny tip, get a variety of colour sharpie’s, makes life a lot easier.. just saying.. 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

Nice repair. looks like they put a bit of thought in to the design and did not cut cost in production. Somewhere there is a WEEE bin dying of hunger. 🙂

Good

superb video. I have a few of these screwdrivers that also have duff batteries. They are a superb screwdriver from memory. can i ask where you got the battery replacement or the voltage of the replacement battery? Many thank in advance

I found sowing machine oil is good for oilite bearings so give it a try, I used to repair hoover motors and Kenwood motors, and they have oilite bearings in them, nice job, I like the ring adapter good idea, what did you use I must convert mine, thanks Bob in the UK

The leds on show an imbalance of the cell voltage, should have disappeared when charged.

Hi do you know where i can find a replacement motor?

The weee bin must be crying out for food.😂😢

I like your video old man.

May I ask why you used 6 volt charger here, even though the original charger voltage in the other videos for you was 11.5 volts?

Use silicone for your LED windows it work very well

Great Vid, as cant see your charger would an Imax b6 charger be a good addition to your arsenal??

If you fancy selling one let me know, my workshop was broken into and my tools were stolen so now at 78, I am looking to replace some of the same Thanks, Bob in the UK

Debes agregar una placa bsm para prevenir daños en la batería y explosiones .

Thank you

Lol. But why.

why didn't you use BMS? Using Li-Ion batteries without BMS is dangerous, isn't it?

the two speed option could cause a problem with one battery becoming flat before the other and reverse charging it. Nice repair.

Where's the voice over gone ? Nice job.

Great detailed and thorough fix! Only thing is the lowest speed became too slow. I believe the 2 screws holding the board control the lowest speed if you tighten or untighten them. I am not sure. I recently replaced the x2 capacitors because they were smoking and bulging and I believe I adjusted the lowest speed using these 2 screws. Thanks for sharing

Is it possible to produce 220v AC with this?

Another excellent video. I actually did the same thing you did with a Black and Decker driver. I made several mistakes before I finally got it to charge via USB. If I had seen this video prior to me starting to fix it, I would have avoided several of the mistakes I initially made. As always, thank you for the great videos.

the dreaded blue tack! the leaver of oily deposits on your board. Nice mod you need a light pipe I wonder if you can make one out of hot snot.

Great Job!🎉

Nice conversion, I have a couple B&D and a couple Skill I will for sure be doing this upgrade. I noticed that you didn’t put the plastic spacer back in, is there a reason for that? Thanks for sharing, Wayne

my bosch screwdrives was bought for 8months, used within 10 times and happened like this video :(. I hope I can get your help too:((((