turn signal relay - capacitor

[drunvalo]

hi all,

i have a turn signal relay on my motorbike and the timer circuit is
broke , i took the capacitor out and it is the problem. a new turn
signal relay cost 40 euros , the capacitor will only cost a fraction
of that .

the problem i have is that i cant determine the charge of the
capactior . it has 5840 wrote on the side of the capacitor, and the
word maram . i normally see 3 digits or colours, i cant figure out
what this one is . its an electrolytic.

i presume the company who made it is maram , and the number is a code
for the size of the capacitor. i think it is 58 micro farads , would
anybody know . i am using the multiplier rule i'm not 100% sure
though.

i hope some can help me , i am sick doing manual indication ( i
have a piece of wire in the circuit for the time been )

thanks in advance

karl

 

[big.rad.maps]

the problem i have is that i cant determine the charge of the
capactior . it has 5840 wrote on the side of the capacitor, and the
word maram . i normally see 3 digits or colours, i cant figure out
what this one is . its an electrolytic.

i presume the company who made it is maram , and the number is a code
for the size of the capacitor. i think it is 58 micro farads , would
anybody know . i am using the multiplier rule i'm not 100% sure
though.

Capacitor marks are probably 58 x 10^4 picofarads ==> 0.58 uF. My
guess is that the 0 is a tolerance, perhaps 10 or 20%
A guess as to the operating voltage would be above 100V

 

[Don Bruder]

Capacitor marks are probably 58 x 10^4 picofarads ==> 0.58 uF. My
guess is that the 0 is a tolerance, perhaps 10 or 20%

Agreed on the most likely value. I'd expect the tolerance to be pretty
wide, though - We're not exactly talking critical-to-the-picosecond
timing here.

A guess as to the operating voltage would be above 100V

For a motorcycle circuit?!?

Well, OK, you COULD use a 100V+ component, and doing so would be 100%
harmless to anything other than your wallet, but it seems to me that
would be some fairly major overkill.

I'd expect a cap in such an application to be rated somewhere in the
20-50 volt range, since unless it's a really unusual bike, the highest
voltage that anything on it other than the ignition system is likely to
see (barring some catastrophic failure mode like hitting a power pole
and having the live wire drop on the bike - but in that case, the
survival of the cap is going to be the least of your worries...) will be
in the range of 12-15 volts.