Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

HELP ! Potentiometer Needed for Keyboard






wesdaman14

wesdaman14

0
Joined
Mar 2, 2008
Messages
1,500
Points
0
Okay but i don't get any measurement at all, and i even tried 20K setting. Would just buying a 10k Pot to test it out hurt anything ?
 
lasersbee

lasersbee

0
Joined
Sep 20, 2008
Messages
17,622
Points
113
No need to test the Potentiometer (unless you want to see if it is any good)...
The value is stated on the part in standard notation...

103 = 10 + 3 zeros = 10+000 = 10,000 Ohms...

I'd put my money on... a Linear type as FML posted...

Any 10K pot will work as long as it will fit physically...


Jerry
 
Last edited:
FireMyLaser

FireMyLaser

0
Joined
Jan 12, 2008
Messages
3,290
Points
83
You probably had the wrong setting and the meter just read infinity or zero, because the the sensitivity was way too high or low. Try on the highest range and step down the ranges till you get a clear reading. ;)
 
N

nikokapo

1
Joined
Dec 26, 2007
Messages
6,129
Points
0
diachi said:
Were you measuring it as part of a circuit ?
Click to expand...

No. It was a single separate pot.


No need to test the Potentiometer (unless you want to see if it is any good)...
The value is stated on the part in standard notation...

103 = 10 + 3 zeros = 10+000 = 10,000 Ohms...
Click to expand...

I knew the numbers had to be a notation, I never really paid much attention to it, I always had to look up the capacitor codes for ceramic capacitors, I could NEVER remember how to know the capacity with the numbers :(

He's using it for a keyboard, don't you think the pot should be logarithmic?
 
wesdaman14

wesdaman14

0
Joined
Mar 2, 2008
Messages
1,500
Points
0
Yeah im just gonna go to RS and get a 10k Pot, but is it linear or which one ? ?
Here is another pic showing what the potentiometer serves its purpose. its the one on the left, the right goes up and down for the pitch bend.

Picture016.jpg
 
N

nikokapo

1
Joined
Dec 26, 2007
Messages
6,129
Points
0
Yeah. But the tolerance is too high for me, maybe if you got a 12kOhm one with the same tolerance it'd be ok.
 
rog8811

rog8811

0
Joined
Jul 24, 2007
Messages
2,749
Points
0
My guess is that laserbee is correct on the value but you can still do some checking.

Unsolder the wires from the pot (to be sure you are not measuring over a parallel resistor), measure across the 2 outside tabs, if you get nothing however you set your meter take the pot apart (it doesn't work at the moment so you will not make things worse) now you can see what is going on.
Is it a wire wound track? if so find the break and measure from the break to one end then the other side of the break to the other end...add the readings together.
If it is a carbon track you need to see if you can find the crack and do the same as above.

Regards rog8811

Edit....didn't notice page 2 :whistle: doing the above will do no harm though....
 
Last edited:
E

ElektroFreak

0
Joined
Nov 7, 2008
Messages
5,725
Points
0
Any resistor that says "103" on it is a 10k resistor. That includes pots. Manufacturers allow for slight variation between pots, and I wouldn't trust a reading from that pot since it has no doubt been used a bit. The more you use a pot the more it's electrical characteristics change (albeit very slightly) over time. There is no question about the value. It's a 10k pot.

The way the numbers work is:

103

10 = 10
3= number of zeroes
______________________
10,000 = 10k

102

10=10
2= number of zeroes
______________________
1000 = 1K

473

47=47
3= number of zeroes
______________________
47,000 = 47k

472

47=47
2= number of zeroes
______________________
4700 = 4.7k

etc, etc.
 
Last edited:
You must log in or register to reply here.




Top