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Re: Simple LED driver StUPID QUEStION
(7)
First of all, the 220V is probably AC. We really don't want the negative half cycle. So, at the very least you will need a series diode. Now we have 110V DC

rtstofer
7
posts
5:25 PM

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Car alternator toasted—twice!
(77)
"Ideally, you use as little of it as possible." It also drys out. If you have a high value asset, that's in a heavy use, it pays to go in, and re-pack the

fmfvt
77
posts
Feb 26

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Labeling Wires
(6)
This is what we use at work in our electrical panels: http://www.amazon.com/Brady-BMP21-PLUS-Handheld-Printer-Multi-Line/dp/B00IELD1O4# On Tuesday, February

Nelson Johnsrud
6
posts
Feb 24

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Simple LED driver
(12)
On 2/24/2015 9:38 PM, Paul Alciatore palciatore@gt.rr.com ... Hello Paul, In succeeding messages the original poster said. "I don't have any data on LEDs-they

Howard Hansen
12
posts
Feb 24

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bistable multivibrator / discrete frequency divider
(12)
Yes, Andy, you are right, I was thinking of the 1N4001 series. :-) I find it interesting that the 1N4001 has a capacitance of 15pF compared with the 1N4148

Jan Kok
12
posts
Feb 23

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New file uploaded to Electronics_101
(460)
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Electronics_101 group. File : /1 -

Electronics_101@yahoogroups.com
460
posts
Feb 23

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Electronics Design Cost Saving Tips?
(48)
Mark, I really like the AT Tiny85 and have the environment and knowledge to program it. Sadly, I have found it to be a wonderful solution looking for a

Rick Sparber
48
posts
Feb 21

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Old Mullard Germanium Transistor Datasheets
(6)
Geoff Thank you very much. It is always very difficult to locate info on some of the older pieces in our collections of parts. I too will will attempt to

Scrolling8
6
posts
Feb 20

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BJT Easy Relaxation Oscillator / LTspice, open node
(37)
... Their price is a bit absurd, considering. OTOH, I googled the title and the first hit gave me a 400-some-odd page pdf to download, of the 1993 edition.

Roy J. Tellason, Sr.
37
posts
Feb 19

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Proximity sensor to replace microswitch?
(15)
The only thing the original post says about the machine is that it processes soil and there is dirt or dust everywhere. That may help, but it is hardly a

epa_iii
15
posts
Feb 18

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on snubbers
(14)
Instructables link is not mine and they are not reliable for technical information; the cliftonlabs link is worth a look, which is why I posted it. Donald.

Donald H Locker
14
posts
Feb 18

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Help identifying part
(7)
I think I found the part I need. Roy definitely put me on the right track. I had been using the wrong key words in my searches. When I used "optical

bobg12546
7
posts
Feb 15

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Circuit Cellar 7805 circuit challenge.
(19)
Drat! Yahoogroups seems to be randomly deleting the quoted text. Anyway... this looks like a decent online tutorial about linear power supply design. Linear DC

alienrelics
19
posts
Feb 6

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Voltage Regulator Chip/Design for VARIABLE Supply
(11)
The LM43603 does look like a better chip, but it is also more expensive, not available in a through-hole version, has a smaller heat transfer area, and seems

epa_iii
11
posts
Feb 5

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High amperage 18 volt power supply
(48)
How about using 2 or 3 LM350 Voltage Regulators in parallel ?Vis:- all 3 inputs of the LM350's connected to the 22V supply with 100nF/50V ceramics Caps as HF

Howard Chester
48
posts
Jan 20
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