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Filtering noise from starter motor?

(11)
There really should be capacitance on those lines. Vehicular power is notoriously noisy (as you've discovered.) Both would be helped greatly by 10uF to 100uF
Donald H Locker
11
posts
5:30 PM

Inductance of a solenoid with an iron+air core

(3)
Thank you, Donald. I appreciate your help. Kerim ... Hello, Kerim. When the core is only partially iron, the relative permeability is lower than with all iron,
ahumanbeing2000
3
posts
Jul 14

Lead acid battery desulfator/regenerator project open sourced

(4)
Hi Derek: You can directly apply it to 6V batteries like the popular Trojan T105. The key element is either you manually monitor the battery voltage /temp and
AncelB
4
posts
Jul 11

Power Supply

(43)
You need to get a good VOM (Volt Ohm Meter) and learn how to use it. I don't mean just reading the instructions that come with it, but a good book on how to
Paul Alciatore
43
posts
Jul 7

FTDI to RS232

(4)
Thanks for the help Aaron. I am putting togather my Adafruit shopping list now. I know what you mean about those fake FTDI USB-serial adapters. I have a box of
bobsmacbox
4
posts
Jul 5

Re: Power Supply [1 Attachment]

(9)
... What I meant by that, is that the construction of the core doesn't affect which wire goes with which winding. Of course the core (and size of wire and
Andy
9
posts
Jul 1

small triacs

(6)
... I grabbed the bad I'd tossed these into, and found a total of six TO-92 parts in there, with three different numbers. The ones I just salvaged are not
Roy J. Tellason, Sr.
6
posts
Jun 26

Solder

(17)
use a spray "no-clean" flux and a 60/40 Solder . Precharge the PCB with spray flux. With a 1mm " wire",  solder  on the Board and 1mm desoldering wick.
Howard Chester
17
posts
Jun 19

compressor relay accessories?

(27)
They did not manufacture it. What was different was that only TWO phase wires and a ground were present rather than three. The farm, except for the
Stuart Bouchey
27
posts
Jun 15

What to salvage from dead microwave oven ?

(12)
... Yeah. I woudn't ordinarily have scrapped out a bunch of hard drives without some testing first, but in this case the interface was something proprietary
Roy J. Tellason, Sr.
12
posts
Jun 15

12vDC power supply to 9vDC, 4.5vDC, or 3vDC

(14)
... Heh. Especially if you're using multiple levels of external pass transistor to boost the capabilities of the output... -- Member of the toughest, meanest,
Roy J. Tellason, Sr.
14
posts
Jun 15

Identifying thermocouplea

(12)
Without cold junction compensation, the mV measurements will not nearly align with thermocouple characteristic tables. The CJC compensates for the
Donald H Locker
12
posts
Jun 9

USB power injector

(4)
I think it depends on current capacity of USB port in computer, if it's USB 2 current limit is 0.5 Amps,USB 3 i believe is about 1 amp. My tablet charger has a
Raymundo Vega
4
posts
Jun 7

Thermistor

(21)
I work with printing press mechanics on a variety of presses. One mechanic has a favorite saying: "It's amazing what a little lubrication will do." He's
dave smith
21
posts
Jun 4

USB microscope cameras

(11)
Thanks Jan Kok and all of you for your thoughts. I have used the magnifying table light. And binocular microscope. And magnifying glasses. And magnifying
Steve65
11
posts
May 30
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