This dubious electronics burglar alarm kit, which cost 50p at my local charity shop, kept me amused for a full 24 minutes. That's pretty good value 🙂
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Very funny video, Julian! I love it! 🙂🙂🙂
In your patent document, the anode is the rectangular box on the right, the grisd is the squiggly line in the middle and the cathode IS the filament. Very old symbology, but often found in old documents such as this.
Shorting the piezo is better for the parents. The batteries will run d down sooner so they will not have to hear it.
I get it, Ein-O = I know. or Eight Inch Nails?
To be fair this kit is meant to get children interested in electronics/science. If they wrote the actual description of it children wont understand it at all.
about not mixing the batteries: early 1.2V NiCads had both a … creative voltage and kinda random internal resistance, so you could mess them up when mixing them e.g. in parallel with an 1.5V alkaline (because that'd essentially apply a reverse current through the NiCad) or in series essentially try to charge it, resulting in the capacity of the NiCad to degrade etc.
Not mixing old and new batteries is easy: you don't want your nice new battery to blow the almost-leaking old one. also you want multiple batteries for a reason, and not one new one that even gets its voltage dropped and/or current limited by the now essentially just being crappy resistors old ones.
If you mix old and new batteries, the product turns on and the two batteries waste a ton of energy balancing out
The design is based on a joule thief. That's why they said the inductor increases the voltage.
Would make a great decoy burglar alarm!!! Not. Maybe if you taped some red cardboard tubes on the side and poked some of the wires in, it might look like an IED. Lol. Actually thats a bad idea.
Hundreds of Londoner's each year are killed or seriously injured from mixing up new and used batteries. It can be very dangerous. If you use a choke coil to change the voltage flowing through the battery it can be safe to mix but only under adult supervision. The government should pass a law protecting people by making mandatory minimum sentences for people caught mixing batteries. PLEASE THINK OF THE CHILDREN AND DON'T MIX NEW AND OLD BATTERIES!!!!!
Electricity does not flow at the speed of light, it's not even near. That's a very common error
Sounds like you've invented some kind of electronic bag-pipe. Better send it to Big Clive for analysis. :=)
Even for a child's toy, that is a piece of crap, whoever put this kit together, needs to back to basic electronics and at least learn component operation.