If you look at a side profile of a CR2032, you may notice that the bottom half, the negative pole, is slightly inset from the positive top and outer shell. Now look at the cell holder on the cricket, and notice the metal retaining "clip" that holds the battery in place. If you're using same size brass disks, you are likely shorting the bottom (negative) side to the metal clip that's also holding the top (positive) side. This would explain why when you tapped on the cricket, it would briefly come to life: you were jostling the bottom negative side away from that metal clip that holds the "battery" in place. One relatively easy solution is to put a piece of tape along the edge on the bottom disk, so even if it comes in contact with the metal retaining clip, it's insulated. Yes it's an extra step, and yes it'll be tedious, but it beats sanding the bottom disks slightly smaller to avoid shorting them with the top. Or just find smaller disks. Nothing says you can't use a 20mm disk at the top and something smaller on the bottom. After all, the bottom contact is in the middle and anything that touches it will work, it's the top contact that matters most as it needs to reach the retaining clip. Here are some 16mm ones you can use on the bottom: www.amazon.com/Brass-Stamping-Blanks-Diameter-Circle/dp/B00J7BVE30/
What a dingleberry. He works on electronics projects and can't easily notice that the positive pole uses the entire rim of the button cell, it's not a top/bottom connection! LOL. What a tool
The positive plate is the same size as the negative plate. And you are likely to short circuit along the edge that clips the battery in. Add a small piece of electrical insulating tape to make sure it does not touch the negative plate to the positive clip, overall a good idea.
I think the issue with the cricket was both plates might touch the +ve connection, because it connects both at the bottom and the side, rather than the top. Lego man defibrillator :-)
I came here because I have a small number but important devices that use cr2032. I don't use them all the time but when I do and they are on low power it's hunt for a new cr2032. This really helped me solve my problem. Thanks
I've been looking for a commercial product already made for this. I have optical gun sights that take these batteries. It would be nice to have a battery eliminator that fed the optic with an external 3.5 volt 18650 on the side. I am kind of amazed no one makes them.
LOL when David says "So it's 20 millimetres in Di-am-e-ter????" (the word being stretched out as he quickly wracks his brain to remember whether he meant diameter or circumference). Another fun project... I hope you and your friends stay safe there in the U.K.
Design two pcbs that each represent the + and - side of the 2032 and glue them together. You can give the top half a through hole in order to wire to the bottom half from top side.
Thanks for this question! It got me thinking that I could test the output from a little 3v adapter (found pretty inexpensively if I don't have one lying around) and if that properly powers the device in question, solder the leads to the battery terminals on the device and done!
You're probably ok making these a bit thinner than a 2032 rather than too thick - I've used 2016s in 2032 holders before when I didn't have the right size to hand. The sprung contacts make up the difference.
This looks so simple but I can not make that 😂. Is there an adapter/eliminator to buy on Amazon/ebay? I have 3 pairs of LED sunglasses that use CR2032 (1 sunglasses 2 batteries on each side) and would like to make them work nonstop. Any solution?
🤯 thank you for this, i was brain storming changing the cr2032 usage. This points me on the right path to try adding a different battery to my keyfob. I’d probably may have to 3d print a bugger one to fit a usb plug in it with the hardware.
So can you use a regular 6 volts ac adapter to replace them on a device that uses 2 CR2032 batteries? And how much amps should it be? Any help would be appreciated
I was thinking more of a cat defibrillator, you went Lego. Definitely should try 3D printing a more reliable rig. Have any of that conductive tape to go around the edge?
How does that neg plate not short out to the positive pin? As the 2032 - are smaller to allow For this. I think you got lucky. But good effort non the less
Maybe for future projects you could build in a connector? Different versions for different powers requirements. Would also give others makers the option of using the same ones, could become (would be the standard Watt power connectors😀)
For a moment I thought you were somehow going to make a CR2032 battery! I suppose you could link all your devices together (assuming you're displaying them or something) and then plug them in to a power source so they all work in unison. Nice idea :)
Well was just about to buy shares in a 2032 battery manufacture, thanks for the heads up. Now looking for a dog tag company to invest in. you might want to look for a Chihuahua tag for the other contact.
Why did you not put the wires on the inside? Would you not try and use an old battery, solder wires on that? I think Lithium batteries do not have much resistance. The minus (plate) should have a smaller diameter, it might otherwise short in some applications. Any how, it is easy to build, maybe you will inspire someone! Thanks for sharing.
If you look at a side profile of a CR2032, you may notice that the bottom half, the negative pole, is slightly inset from the positive top and outer shell. Now look at the cell holder on the cricket, and notice the metal retaining "clip" that holds the battery in place. If you're using same size brass disks, you are likely shorting the bottom (negative) side to the metal clip that's also holding the top (positive) side. This would explain why when you tapped on the cricket, it would briefly come to life: you were jostling the bottom negative side away from that metal clip that holds the "battery" in place. One relatively easy solution is to put a piece of tape along the edge on the bottom disk, so even if it comes in contact with the metal retaining clip, it's insulated. Yes it's an extra step, and yes it'll be tedious, but it beats sanding the bottom disks slightly smaller to avoid shorting them with the top. Or just find smaller disks. Nothing says you can't use a 20mm disk at the top and something smaller on the bottom. After all, the bottom contact is in the middle and anything that touches it will work, it's the top contact that matters most as it needs to reach the retaining clip. Here are some 16mm ones you can use on the bottom:
www.amazon.com/Brass-Stamping-Blanks-Diameter-Circle/dp/B00J7BVE30/
What a dingleberry. He works on electronics projects and can't easily notice that the positive pole uses the entire rim of the button cell, it's not a top/bottom connection! LOL. What a tool
The positive plate is the same size as the negative plate. And you are likely to short circuit along the edge that clips the battery in. Add a small piece of electrical insulating tape to make sure it does not touch the negative plate to the positive clip, overall a good idea.
I think the issue with the cricket was both plates might touch the +ve connection, because it connects both at the bottom and the side, rather than the top. Lego man defibrillator :-)
Good point !....
I came here because I have a small number but important devices that use cr2032. I don't use them all the time but when I do and they are on low power it's hunt for a new cr2032. This really helped me solve my problem. Thanks
I've been looking for a commercial product already made for this. I have optical gun sights that take these batteries. It would be nice to have a battery eliminator that fed the optic with an external 3.5 volt 18650 on the side. I am kind of amazed no one makes them.
if you find an easily available one, please let me know
Nice to see it work so easily.
The compliance in the Velcro might actually be helpful in getting a good fit!:)
LOL when David says "So it's 20 millimetres in Di-am-e-ter????" (the word being stretched out as he quickly wracks his brain to remember whether he meant diameter or circumference).
Another fun project... I hope you and your friends stay safe there in the U.K.
Design two pcbs that each represent the + and - side of the 2032 and glue them together. You can give the top half a through hole in order to wire to the bottom half from top side.
Isn't it easier to solder wires directly to pcb? Maybe flat ribbon cable would be a better solution for more build-up products ?
What did you use to power the board and just deliver 3v and low current? What kind of adapter I mean. Can you share that info of product? Thanks!
LEGO Defibrilator, he got me there
this is awesome. could I sold the wires directly to the metal connector? would that work? thanks!!
Thanks for this question! It got me thinking that I could test the output from a little 3v adapter (found pretty inexpensively if I don't have one lying around) and if that properly powers the device in question, solder the leads to the battery terminals on the device and done!
You're probably ok making these a bit thinner than a 2032 rather than too thick - I've used 2016s in 2032 holders before when I didn't have the right size to hand. The sprung contacts make up the difference.
you want one disc a bit smaller to avoid shorting
This looks so simple but I can not make that 😂. Is there an adapter/eliminator to buy on Amazon/ebay? I have 3 pairs of LED sunglasses that use CR2032 (1 sunglasses 2 batteries on each side) and would like to make them work nonstop. Any solution?
does it work with this Xiaomi thermoemtr ?
23mm diameter is across the item side to side or circumference around the item
🤯 thank you for this, i was brain storming changing the cr2032 usage. This points me on the right path to try adding a different battery to my keyfob. I’d probably may have to 3d print a bugger one to fit a usb plug in it with the hardware.
cool man I did this with double sided copper clad board
Nice... i'm actually looking at powering a CR2032 bike blinking light to USB... inspired by your video!
So can you use a regular 6 volts ac adapter to replace them on a device that uses 2 CR2032 batteries?
And how much amps should it be?
Any help would be appreciated
Yes you can. CR2032 batteries cannot deliver a lot of current so expect under 100mA.
@@DavidWatts Thanks!
Can you make a CR3032 holder review? Including the choices you make between models. Brian L may join your review...
A fine Sunday afternoon's tinkering.
not too lazy ;)
I was thinking more of a cat defibrillator, you went Lego. Definitely should try 3D printing a more reliable rig. Have any of that conductive tape to go around the edge?
Where's Brian Lough when you need him.... he has just the thing already!!
How does that neg plate not short out to the positive pin? As the 2032 - are smaller to allow
For this. I think you got lucky. But good effort non the less
Maybe for future projects you could build in a connector? Different versions for different powers requirements. Would also give others makers the option of using the same ones, could become (would be the standard Watt power connectors😀)
I'm here because I saw the TimeCapsule AirTag 10-Year Battery, and thought that's silly. I can just make one.
For a moment I thought you were somehow going to make a CR2032 battery! I suppose you could link all your devices together (assuming you're displaying them or something) and then plug them in to a power source so they all work in unison. Nice idea :)
Pretty cool and ingenious solution
ahhh that's brilliant, love it!
I dont get it its just 2 pieces of metal without any electrolyte or anything. How is it producing power ?
5G
@@rasmis the kinds that makes me like boys ? Or the WiFi one?
Its basic electro-magnetism, see here th-cam.com/video/gMbnJzHhoBI/w-d-xo.html
Thanks 2024 i just welded a usb and made my own thanks🇵🇷
10:49 poor nice mat, better use a cork pad ?
Well was just about to buy shares in a 2032 battery manufacture, thanks for the heads up. Now looking for a dog tag company to invest in. you might want to look for a Chihuahua tag for the other contact.
Why not save the effort and just solder the wire ends to the cell holder and dispense with any need for metal blanks, etc?
All the way through this all I could think was Blu tack.
Why did you not put the wires on the inside? Would you not try and use an old battery, solder wires on that? I think Lithium batteries do not have much resistance. The minus (plate) should have a smaller diameter, it might otherwise short in some applications.
Any how, it is easy to build, maybe you will inspire someone! Thanks for sharing.
The dead battery will try to charge, thus causing more current to be demanded.
Why am I watch this guy fiddling with a cricket?
I did a YT video Back in 2016 charging button sells -
Isn't this like a capacitor?
Not to be rude per say, however do you know what a capacitor is?
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