Search found 1749 matches

by dyarker
Tue Oct 04, 2022 5:43 am
Forum: General Discussion
Topic: Wall plug electrical pop noise from switch, motor, fridge, etc...
Replies: 9
Views: 63690

Re: Wall plug electrical pop noise from switch, motor, fridge, etc...

I think you mean varistor, AKA MOV (Metal Oxide Varistor).

A varactor is a diode whose capacitance is adjustable by applied DC. Used in radio receivers.

Cheers,
by dyarker
Fri Sep 02, 2022 9:23 pm
Forum: General Discussion
Topic: Wall plug electrical pop noise from switch, motor, fridge, etc...
Replies: 9
Views: 63690

Re: Wall plug electrical pop noise from switch, motor, fridge, etc...

How can you tell if it's in the 120VAC wires or is it RF in the air? The noise is unlikely to come on AC lines and get through the amplifier's power supply. So RF through the air. BUT , the AC lines are a transmit antenna. The audio connecting cables (if any) and circuits in the amplifier are the r...
by dyarker
Thu Aug 25, 2022 3:09 am
Forum: General Discussion
Topic: Historic off topic...
Replies: 18
Views: 90807

Re: Historic off topic...

Probably no longer active..
No ground penetrating WIFI :sad: :shock:
by dyarker
Fri Aug 12, 2022 12:50 am
Forum: General Discussion
Topic: Need help searching for magnets..
Replies: 17
Views: 51491

Re: Need help searching for magnets..

A tech forum for music CDs/records?

Try Amazon next time.
by dyarker
Tue Aug 09, 2022 11:36 pm
Forum: Computer Programming
Topic: [HELP] - Explorer.exe Class Not Registered
Replies: 4
Views: 13304

Re: [HELP] - Explorer.exe Class Not Registered

If it was at Windows boot, someone else would have to help.

If explorer.exe is referring to Internet Explorer the app will have to updated to call Microsoft Edge instead.

Your next post was while I was composing. The explorerframe thing sounds reasonable but I do not know.
by dyarker
Mon Aug 08, 2022 11:18 pm
Forum: Computer Programming
Topic: [HELP] - Explorer.exe Class Not Registered
Replies: 4
Views: 13304

Re: [HELP] - Explorer.exe Class Not Registered

When are you getting that error? At boot time or starting an app? (for example)

{{note to admin - just 3 repeated posts by new user, I did not find any spam links in page source. duplicates can be deleted }}
by dyarker
Thu Aug 04, 2022 10:13 am
Forum: General Discussion
Topic: Battery Bank won't replace a plain old battery
Replies: 11
Views: 31805

Re: Battery Bank won't replace a plain old battery

"The ones i've fiddled with, didn't hardly have anything in them,, a 4 legged transistor looking chip, and a resistor,,could possibly be a resistor looking coil." Exactly! Boost circuit.
by dyarker
Wed Aug 03, 2022 6:41 am
Forum: General Discussion
Topic: Battery Bank won't replace a plain old battery
Replies: 11
Views: 31805

Re: Battery Bank won't replace a plain old battery

there are actually Blue and white leds that will work well with 3v.
could be some newer chemistry.
chinese led garden lights, the leds will operate from a 1.2v Nicad battery.
I'd bet built in boost regulator.

Higher voltages would still mean lamp/bulb with built in current regulation.

Cheers,
by dyarker
Mon Aug 01, 2022 7:41 pm
Forum: General Discussion
Topic: Battery Bank won't replace a plain old battery
Replies: 11
Views: 31805

Re: Battery Bank won't replace a plain old battery

Yeap. Checked Uxcell, they call them "lamps". Their LED lamps have built in current limiting. A red LED itself has a forward voltage of around 1.8V The voltage is set by the chemistry used to make a particular color LED. Higher power LEDs will have a larger max current, but same voltage. G...
by dyarker
Sun Jul 31, 2022 8:29 pm
Forum: General Discussion
Topic: Battery Bank won't replace a plain old battery
Replies: 11
Views: 31805

Re: Battery Bank won't replace a plain old battery

5V LED?? Blues and whites are 3.8V Other colors lower forward voltage. ("raw" LEDS) Maybe an LED bulb with LED and regulator in one package. USB power is not just voltage on two wires. The host and device negotiate the current needed. The blinking is the power IC in the "bank" ch...
by dyarker
Fri Jul 29, 2022 7:49 pm
Forum: General Discussion
Topic: Digital Multimeter Ribbon Cable Connection
Replies: 6
Views: 31294

Re: Digital Multimeter Ribbon Cable Connection

Would not be any solder for "black" trace connection to gold pads. Connection is by pressure. The 3 black spots are where the pressure plate broke off, or the plate is out of view on the back side. (but then why gold pads on this side?) Or they are screw holes for LCD bezel (to the left), ...
by dyarker
Wed Jul 27, 2022 6:08 am
Forum: General Discussion
Topic: Need help searching for magnets..
Replies: 17
Views: 51491

Re: Need help searching for magnets..

Scrap it! From video you linked it looks like a Benny Hill prop. A 100 year old man with one leg gets away by walking while police chase him using those things. Junk brand new.
by dyarker
Fri Jul 15, 2022 7:20 am
Forum: General Discussion
Topic: SPAMHAUSE ip blocker issues,,
Replies: 26
Views: 110205

Re: SPAMHAUSE ip blocker issues,,

Seems to be arbitrary. IMO
Didn't seem arbitrary to me.

Hassle the regulars, let the spammers post.

Which side is SPAMHAUSE on?