Search found 1746 matches

by dyarker
Mon Mar 13, 2023 3:16 pm
Forum: General Discussion
Topic: Looking for a Blue Led display 4-dig. - 7-segment
Replies: 17
Views: 52790

Re: Looking for a Blue Led display 4-dig. - 7-segment

what about the columns? is that going to be an issue as well ?
???????????????????????????????????
Covered.
by dyarker
Mon Mar 13, 2023 9:08 am
Forum: General Discussion
Topic: Looking for a Blue Led display 4-dig. - 7-segment
Replies: 17
Views: 52790

Re: Looking for a Blue Led display 4-dig. - 7-segment

but i haven't had luck to find something that can drive as many segments as the HT16K33 at higher voltage. That is what the last two posts do. Repeat circuit in first post for each row. Repeat the circuit in second post for each column. making an adapter board to work with the HT16K33 seems like it...
by dyarker
Sat Mar 11, 2023 5:30 am
Forum: General Discussion
Topic: Looking for a Blue Led display 4-dig. - 7-segment
Replies: 17
Views: 52790

Re: Looking for a Blue Led display 4-dig. - 7-segment

I figured why take chances with the IC. Good thing the transistors are only 25¢ each at Jameco. (you might even have something useable) LED_LoSide.png Board space is the only "bad side". Maybe try one row and one column, then display a digit that uses that position, then a digit that doesn...
by dyarker
Sat Mar 11, 2023 2:54 am
Forum: General Discussion
Topic: Looking for a Blue Led display 4-dig. - 7-segment
Replies: 17
Views: 52790

Re: Looking for a Blue Led display 4-dig. - 7-segment

One of these for each ROW - LED_HighSide.png Your IC still uses +5V. R Limit is calculated from (higher) supply voltage minus 6.4 (2 LEDs) divided by LED current. Because of multiplexing the LED current may be larger than max continuous LED current. The column outputs of the IC connect LED cathodes ...
by dyarker
Thu Feb 23, 2023 4:53 am
Forum: General Discussion
Topic: Historic off topic...
Replies: 18
Views: 71756

Re: Historic off topic...

I think "]" is missing from forum's URL tag. Forum software makes it to html tag "< a href=https:// ...>showing text< /a >" later.((spaces in html tags so they show here))(((unless URL tag is broken, of course)))
by dyarker
Wed Feb 22, 2023 5:54 pm
Forum: General Discussion
Topic: Historic off topic...
Replies: 18
Views: 71756

Re: Historic off topic...

:? :? Did you mean -
Didja miss a little something, there?
?
by dyarker
Wed Feb 22, 2023 2:29 pm
Forum: General Discussion
Topic: Historic off topic...
Replies: 18
Views: 71756

Re: Historic off topic...

That URL has nothing to do with subject of thread, nor DSL. Does not look like ad, but is off topic.
He tried to hide it comma.
I say it should be removed.
Mucking up the forum tags just made it easier to spot.
by dyarker
Wed Feb 22, 2023 1:48 am
Forum: General Discussion
Topic: How useful to take Chemistry Assignment Help?
Replies: 10
Views: 23083

Re: How useful to take Chemistry Assignment Help?

An actual new member making legit comment.
Or
A new spammer making mess of old spam link
Or
fnafgm12 retrying under a new user name?

I REALLY CAN NOT TELL.
by dyarker
Wed Feb 01, 2023 6:48 pm
Forum: General Discussion
Topic: EXTEC meters E320X
Replies: 16
Views: 55557

Re: EXTEC meters E320X

it's not hard to find a "rechargeable DMM" they charge through a USB port.
Not the leads, the charging current.
by dyarker
Mon Jan 16, 2023 10:01 pm
Forum: General Discussion
Topic: Why you should consider Solar Panel Cooling....
Replies: 4
Views: 14902

Re: Why you should consider Solar Panel Cooling....

Surprisingly well done.

Net power gain is modest, but should pay for the modification. The big payback is life span of the panels!

Cheers,
by dyarker
Thu Jan 05, 2023 12:22 am
Forum: General Discussion
Topic: Is Nuts and Volts dead ?
Replies: 114
Views: 3657504

Re: Is Nuts and Volts dead ?

. . . and good advice were all free years ago.
Advice is worth what you paid for it.
Free = worthless.
From love, friendship or someone with a reputation (on subject) to protect = priceless.
Paid with cash greater than worthless, less than priceless.

Cheers,
by dyarker
Sat Dec 24, 2022 5:31 am
Forum: General Discussion
Topic: Capacitor
Replies: 7
Views: 35831

Re: Capacitor

Nothing to do with power factor correction. Why do smart wall switches need a capacitor? Some smart switches come with a capacitor that is installed at the light socket end between the active line and neutral wire. This takes up the small power flow used by the smart switch and prevents it reaching ...
by dyarker
Fri Dec 23, 2022 1:07 am
Forum: General Discussion
Topic: Capacitor
Replies: 7
Views: 35831

Re: Capacitor

Incandescent light bulbs are resistive. Their power factor is perfect already. Perhaps you saw a capacitor in series with light bulb, to use it on a higher voltage. Or your electrician saw an electrician who knew what he/she was doing put a capacitor across a motor to correct its power factor (motor...
by dyarker
Wed Dec 21, 2022 9:53 pm
Forum: General Discussion
Topic: Anyone make anything interesting for christmas ?
Replies: 9
Views: 20378

Re: Anyone make anything interesting for christmas ?

. . . make it also GPS and RTC.
By GPS, do you mean time syncronised to GPS?

If it tells time of day, it already is RTC. Add day, month and year for complete RTC?

Merry Christmas, and if you go out to party on New Year's eve don't forget taxi money.
by dyarker
Tue Dec 13, 2022 11:53 am
Forum: General Discussion
Topic: Looking for long range HF RFID antenna
Replies: 7
Views: 35014

Re: Looking for long range HF RFID antenna

Its a good thing when they do. But wouldn't they come back if they seriously meant their question?