Questions tagged [lead]
The lead tag has no usage guidance.
0
votes
3answers
56 views
Can a desolder pump aerosolize lead particulates?
I have been reading up on the dangers of leaded solder. I understand the risk of actually soldering with it are minimal but my question is specifically its removal via "solder suckers."
Does this ...
0
votes
0answers
51 views
connecting three batteries together
I have a scenario of connecting three batteries together. Two are 12V 80 AH and one is 12V 150AH . All are C20. I wish to make it a 24V system of 150AH by connecting the two 80AHs in parallel which ...
1
vote
2answers
107 views
Why do bipolar electrolytic caps have a long and short lead?
Ok maybe not all, but the Nichicon UES series of bipolar "audio-grade" electrolytic through-hole caps have a short lead and a long lead..
Why?
The datasheet has nothing to say about it.
This fairly ...
0
votes
0answers
22 views
Balance charging lipo cells with balance charger
I like to build a 14.4 v batterie pack from 4 x 2 lipo cells.
But the balance charger can only handle 6 cells.
In videos it looks like as if the balance lead is connected
between two cells. So that ...
0
votes
1answer
45 views
What is the proper procedure to charge a lead acid battery?
and thanks in advance for your answers.
I have a 12v 6Ah lead acid battery, and have been instructed to charge it using a configurable power source.
They told me I should use a float charge, ...
0
votes
3answers
58 views
Question about straightening the pins of a resettable polyfuse
I have resettable polyfuses like the picture below.
I am working on some PCB boards where I solder the wires myself on the PCB. Because it is very hard/cumbersome work to solder very small wires, I ...
0
votes
0answers
37 views
low impedance as GND and current measurement, applied voltage sharing the same lead
(Image 1 is for the general idea, image2 is for questions 1 and 2, image 3 is for the 3rd question)
In the setup shown below, the tuning fork is driven by an AC voltage source being connected to one ...
-1
votes
2answers
89 views
Question about lead acid batteries? [duplicate]
I am having two batteries of different specs (both, dry cell, UPS/inverter batteries)
Battery A:
12 V, 26 Ah
Battery B:
12 V, 7.2 Ah
I need a 24 V output so I have connected them in series.
My ...
0
votes
2answers
69 views
Charging a smartphone with lead acid battery [duplicate]
I am trying to do this prototype where I require a smartphone to be charged for a substantial amount of time(probably as long as possible, like months or if possible years). Hence I was thinking of ...
23
votes
6answers
5k views
Why does voltage always lead current by 90 degrees in an inductor?
I have learnt that in an inductor voltage leads current by 90 degrees. However, I do not fully understand why it is 90 degrees.
I have been looking everywhere for more information on why this is so. ...
0
votes
1answer
57 views
How does High Purity Lead Solder react with Orthophosphoric acid [closed]
I am currently reviewing all processes and chemicals used in my firm and the one I came across this week is that we are using a high purity lead solder with Orthophosphoric acid. Ignoring the CLAW ...
0
votes
1answer
61 views
Lead acid charging
I am thinking about designing a car battery charge maintainer for long trips/car storage, and use a solar panel as an energy source. All other things aside, a few questions:
Can you use standard CC/...
0
votes
0answers
127 views
Removing Lead from surfaces/floors
I have been doing some soldering in my garage, and because of my solder sucker, there is a some lead dust/powder on the table and floor. What would be the best methods for cleaning up as much of this ...
-1
votes
2answers
2k views
Finding proper motor for lead screw lifting?
I need to lift amount 0.6 kilogram up to 20 cm in 2 second with Permanent Magnet DC Motor with PWM speed control driver ,for this device:
So i have one PM dc motor with 300 RPM MAX,12 V and 2 Watt ...
1
vote
2answers
4k views
charging a lead acid battery bank with a 19v laptop charger
I am new to the forum and I notice that you have decent positive discussion and tips which also includes noobs on any given electrics related topic,
I was requested to post it as a new question here: ...
3
votes
7answers
396 views
Understanding Lead in a causal system
I've gone through school and done all the work but looking back at it i still don't quite get it.
The rule is current in a capacitor leads and in an inductor lags. The inductor makes perfect sense ...
