34 minutes of supercapacitor shananigans.
Julian's Postbag: #68 - Why do I buy all this eBay stuff? - https://youtu.be/l8OU4kEQlho
Farad Capacitor 2.7V 120F 6pcs Super Capacitor With Protection Board Module http://www.ebay.com/itm/-/322082558227
Julian's Postbag: #68 - Why do I buy all this eBay stuff? - https://youtu.be/l8OU4kEQlho
Farad Capacitor 2.7V 120F 6pcs Super Capacitor With Protection Board Module http://www.ebay.com/itm/-/322082558227
the bulb does not have linear resistance Julian, you would need ampmeeter with the bulb to see it 😉
thank you for the great video!
please let us know what is the name of the tiny cool power supply, how we can get one?
thank you again!
Try probing voltage across resistors and the actual resistor values. 5 ohms across the LED is probably affecting it's turn-on characteristics, that's quite a shunt!
I wish i was standing there so i can yell boom
Where did you get the power supply?
Fairly expensive and overdone random lightshow generator Julien 😀
Great video as always Julian, thank you.
I have a very similar board just arrived and I am trying to test the balance circuits with blue LEDs.
I've taken it up to 17.2V (measured board side of the diode) – as far as I dare with not a sign of an LED lighting. I'm really quite an early learner in electronics despite building many kits etc. Much better at logic circuit than analogue.
I'm now worried about the correct polarity of the LEDs – I have connected the LEDs across the load resistors with the +v (long lead) of the LED to the side of the resistor that;'s connected to the +v capacitor feeds is this right?
Also my load resistors are 4R7 (4.7ohm?) rather than the 100 (10 Ohm?) you have. I'm right that they'll still be a ~2.7v drop, just a hight current?
random light show 🙂
Entertaining, interesting and informative vids. I've gained quite a bit of knowledge. thanks
How many watt/hours of storage does this have?
Also I had a 2 farad 16v super capacitor and i took it all the way up to 20v before it started to clamp the voltage on its own from its internal resistance dropping further and discharging itself..
It stayed cool and didn't vent and functioned just normally afterward. so it was completely fine even at 16.5v as long as you dont supply too much current it won't be able to blow itself. theres a point where the current your charging it with is too low for it to charge past its maximum rated voltage too high.
so the capacitors do have some decent tolerance.
And some people do charge up these 2.7v capacitors much higher than 2.7v and they get away with it for years and years and the capacitors are just fine.
Well there is a bit of internal resistance on the capacitors while charging. so when you take off the charge from them. the voltage will immediately drop to about 16.2 or perhaps below maybe.
so the voltage is slightly higher while they are charging than when they are open circuit with no attached
can i connect parallel this module into car battery without any circuit ? is it safe ?
where did you get the battery charger and booster? is it a kit? link me up
hey julian thanks a lot for your work,
i wanna know where you get these DC power supplies and if there any link to buy them
and another question do you have a video about buck boost convertors
yes he's going to blow them up
Can I get a link for your sketchy PSU?