Search found 1747 matches
- Tue Dec 13, 2022 11:53 am
- Forum: General Discussion
- Topic: Looking for long range HF RFID antenna
- Replies: 7
- Views: 42305
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?
- Tue Dec 13, 2022 12:56 am
- Forum: General Discussion
- Topic: Looking for long range HF RFID antenna
- Replies: 7
- Views: 42305
Re: Looking for long range HF RFID antenna
Failed spam attempt?
OP didn't know how to put in a link?
OP didn't know how to put in a link?
- Sun Dec 11, 2022 8:45 pm
- Forum: General Discussion
- Topic: Looking for long range HF RFID antenna
- Replies: 7
- Views: 42305
Re: Looking for long range HF RFID antenna
What do you consider "long range"?
- Wed Dec 07, 2022 10:23 pm
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
I hope I did it right and am done.If you need a calculator for the LM3914, there's plenty on-line.
For example, LT1084 sheet says 10 mA minimum load and Out to Ref is 1.5V. A few clicks on Windows calculator I had resistor values.
((R1 may need to be 9.31 kΩ instead of 14.7 kΩ.))
Cheers,
- Wed Dec 07, 2022 8:49 pm
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
LT1084 spec sheet https://www.mouser.com/datasheet/2/609/ ... 269789.pdf
Could somebody double check my numbers please.
dacflyer, should keep you busy for a bit.
Cheers,
Could somebody double check my numbers please.
dacflyer, should keep you busy for a bit.
Cheers,
- Tue Dec 06, 2022 6:23 am
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
Unless you want the fun
- Tue Dec 06, 2022 5:20 am
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
Short time I would have suggested two 9V batteries in series through a momentary contact switch to pin 3 of LM3914.
Full time calls for a voltage regulator from BUT (battery under test). I'll modify image from post 1 and come back.
Cheers,
- Sun Dec 04, 2022 12:24 am
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
Will this stay connected to battery full time and continuously on? Or with a momentary "on" switch?
- Sat Dec 03, 2022 10:02 pm
- Forum: General Discussion
- Topic: LM3914 Help
- Replies: 14
- Views: 43523
Re: LM3914 Help
Actual spec sheet
https://www.ti.com/lit/ds/symlink/lm3914.pdf
max supply is 25V and measure input(s) protected to 35V.
Regulate supply to 15V - 18V. Voltage divide input by 2. That will give a 26V high end input, while staying safely away from IC maximums.
(half of 26V is 13V)
Cheers,
https://www.ti.com/lit/ds/symlink/lm3914.pdf
max supply is 25V and measure input(s) protected to 35V.
Regulate supply to 15V - 18V. Voltage divide input by 2. That will give a 26V high end input, while staying safely away from IC maximums.
(half of 26V is 13V)
Cheers,
- Thu Nov 17, 2022 4:08 am
- Forum: General Discussion
- Topic: Spamming for Spammings sake?!
- Replies: 3
- Views: 20120
Re: How to Identify a Problematic Cylinder Head
If it is like Kuwait, the foreigners who are in-country to do the dirty jobs for more than they could get in their own country.who in Dubai would be buying a bottom tier GM vehicle anyway?
Cheers,
- Mon Nov 07, 2022 8:17 pm
- Forum: General Discussion
- Topic: loud tv commercials
- Replies: 5
- Views: 21689
Re: loud tv commercials
Sorry to rain on your parade, but progress probably prevents doing it. No more volume potentiometers, the circuit you need to tap into is inside a big chip, even the audio line(s) to the power amp chip could be a trace inside a multi-layer board. If you find something that works on modern TVs, let u...
- Thu Nov 03, 2022 8:24 am
- Forum: General Discussion
- Topic: Is Nuts and Volts dead ?
- Replies: 114
- Views: 3813038
Re: Is Nuts and Volts dead ?
Not really, just removed before you see it!At least most of the spam has come to a halt...
- Wed Nov 02, 2022 5:03 pm
- Forum: Computer Programming
- Topic: Excxel Question...
- Replies: 7
- Views: 39563
Re: Excxel Question...
How large is the file? Number of sheets in file?
- Tue Oct 04, 2022 5:43 am
- Forum: General Discussion
- Topic: Wall plug electrical pop noise from switch, motor, fridge, etc...
- Replies: 9
- Views: 59232
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,
A varactor is a diode whose capacitance is adjustable by applied DC. Used in radio receivers.
Cheers,
- Tue Sep 06, 2022 5:23 pm
- Forum: General Discussion
- Topic: Wall plug electrical pop noise from switch, motor, fridge, etc...
- Replies: 9
- Views: 59232
Re: Wall plug electrical pop noise from switch, motor, fridge, etc...
What is the amplifier plugged into?