All Questions
35
questions
0
votes
1
answer
127
views
Where to find battery pack contacts [duplicate]
So i need those metral spring terminals like those on this battery pcb, can someone help to find those, or whats called at least.. THANKS
- 11
0
votes
2
answers
168
views
Need help understanding the basics of electronics
I would like to state that I'm a beginner in learning electronics by reading my first book on electronics I'm lost and would like some help. I even included an image that would hopefully help my case.
...
0
votes
2
answers
332
views
Did I accidentally ruin this circuit board?
I was advised to remove the old solder so I read online that I can do it with a knife. I scraped it off, but now I'm not sure if it's ruined or if it still works.
Here is the original (B+ and ...
- 115
1
vote
2
answers
3k
views
How to attach battery wires that got detached from this circuit board?
Not an electrical person (at all!), but looking for some guidance as I feel this could be an easy fix.
This piece belongs to a kid's camera that only works when it's plugged via USB. When you unplug, ...
- 115
1
vote
1
answer
324
views
Soldering cheesy 9 V battery wires to wires I can plug into my breadboard
I have a wire that fits atop my 9 V battery and it should easily feed into a breadboard but it does not as the wire is stranded.
I tried last week to solder these wire strands to breadboard jumper ...
- 251
0
votes
0
answers
437
views
Using capacitive touch screen without human hand
I'm trying to learn more about how to engage a capacitive touchscreen without using a human finger. Full disclaimer I'm in mechanical engineering (notoriously known to have difficulty comprehending ...
- 11
2
votes
3
answers
696
views
Wire resistivity / heat generation
How to calculate the volts/amps of a battery which is connected to a simple wire for heat generation?
That is, how to use:
known wire length, diameter/area, resistivity
to calculate the required volts/...
- 55
1
vote
2
answers
2k
views
How to design DC bus bars for batteries?
What factors should we consider for designing bus bars for cell terminals? Suppose I have LFP battery pack made up of 9 cells in series each having maximum of 3C discharge rate and a nominal capacity ...
- 11
1
vote
0
answers
55
views
What are the components I would need for an electromagnet with the given specifications?
I need to make an electromagnet that exerts at least 5 times its own weight on a ferromagnetic material kept 0.03 m away.
I know that:
F = [(number of turns × current)2 × magnetic constant(4 × pi × 10-...
0
votes
0
answers
60
views
Segmented Wire Gauge and DC Current Capacity
I am working on a project that brings power from a car battery inside the vehicle and to a DC-DC charger. The DC-DC charger then takes the power and charges a second battery. The system is rated at ...
- 111
3
votes
4
answers
2k
views
With enough copper wire, can I attach one end to one side of a 9V battery, then circle the earth and connect it back?
This is a dead serious question I have not been able to find an answer to: if I had enough wire, could I make electricity pass through if I connected one end to a small 9V battery and then circled the ...
- 41
2
votes
0
answers
162
views
Wire gauge to connect to chassis in van
I'm building an AC electrical system for my van conversion and I'd like to know if there's a minimum wire gauge I should use to connect my negative bus bar to my van's chassis.
Specs:
I'm running a ...
- 131
2
votes
1
answer
171
views
What are the possibilities to increase temperature of resistive wire?
I recently got stuck on heating up a resistance wire. I have 80cm long resistance wire (from hair dryer) that I need to heat up to about 160°C. Currently I have a battery pack that produces 33.6V DC ...
- 29
0
votes
4
answers
456
views
Tap into 12AWG wire with 20AWG wire
I am using 3 of these Mighty Max 12V 12Ah batteries on my Razor MX650 electric bike and they are connected with 12 gauge wire. I would like to tap into the power on one of the batteries with a 20 ...
- 115
3
votes
2
answers
4k
views
Nichrome wire not heating up with a 9 V battery
I have a 42 gauge nichrome wire. When I pass current through it from a 9 V battery, it does not heat up. I have checked the circuit properly and also the battery.
Wire resistance: 5.8533 Ω
Wire ...
- 39