Subject:
|
Re: Choosing Parts?
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Wed, 21 Apr 1999 12:14:12 GMT
|
Original-From:
|
fthompson9@aol%NoMoreSpam%.com
|
Viewed:
|
853 times
|
| |
|
|
In a message dated 4/21/99 1:08:33 AM Central Daylight Time,
josr0633@cetus.zrz.TU-Berlin.DE writes:
jos runarko:
> in Catalogs, there are many capacitors with the same capacity value but
> different voltage and tolerance. My question is, which voltage should I
> choose: above the operating voltage of 12 V?
For electrolytic capacitors, you want the printed voltage to be the
closest voltage above the voltage you are operating at. The voltage listed
on the can is the one it works best at. Careful with the polarity. Reversed
polarity will cause the capacitor to heat and deform. Large voltage in
reverse polarity will cause the capacitor to explode.
> Second, the tolerance the lower the value it has a better tolerance: 1%
> is better than 2%?
Yes, tolerance is the error in the manufactured value. A 5%
resistors actual value is within 5% of the printed value. So if the resistor
is Brown, Black, Orange, Gold; the value is 10,000 ohms +/- 5%. So the
actual value of the resistor is between 9500 ohms and 10500 ohms.
hope this helps,
Pherd
|
|
Message has 1 Reply:
 | | Re: Choosing Parts?
|
| (...) I don't mean to be harsh, but this isn't exactly correct. The voltage is the highest the capicitor is rated for. if you have a 12V circuit it won't hurt to put in a 200V cap, but you'll need lots of room. Generally for safty, in high current (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
|
2 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
