Changing Electrical componet sizes
Changing Electrical componet sizes
(OP)
Hello, Its been a long time since I've done electronic troubleshooting. I was wondering about changing resistors & Caps that are bad with some that are larger. I have a 15 ohm 1/4 watt resistor thats bad & was wondering if I could use a 15 ohm 1/2 watt. Also I have a .1 mf 100 volt cap and wondered if a .12mf 600 volt cap of the same kind would work. Its a little physically larger but not to big.
Thanks Don
Thanks Don





RE: Changing Electrical componet sizes
RE: Changing Electrical componet sizes
As to the capacitor, 0.1 mfd caps of all kinds of voltages are readily available. Check digi-key if you are in North America.
RE: Changing Electrical componet sizes
RE: Changing Electrical componet sizes
OF COURSE there are circumstances that require special resistors, but by the sound of the orignal post, I don't think bumping the power will cause too much problem. However, just dot your i's and cross your t's and make sure you know exactly what the circuit is doing.
With regards to caps, those are definitely NOT no brainers (not + no = is???). Even keeping that same values (C, %Tol), can have hugh circuit implications. Try changing a cermaic cap to a lytic in a timing circuit. (might work at room, but wait till it gets hot). That is exactly why I told him to figure out what the cap is for.
RE: Changing Electrical componet sizes
If I knew exactly where they were, I would send him one.
As to capacitors, try making the mistake of putting a 10uF ceramic on the output of a linear regulator, and see what frequency it oscillates at. It had better be a tantalum or electrolytic. Just the point you made.
RE: Changing Electrical componet sizes
BTW: His component is probably a thru hole part but most resistors made are not thru hole parts. Also, I was not disagreeing about the statements made about capacitors. Obviously ESR values, polarity, and frequency of operation can have a significant effect on circuit performance, again depending on the application.
Breath melone breath.
RE: Changing Electrical componet sizes
Thanks again
Nod
RE: Changing Electrical componet sizes