On January 3, 2007 at 20:45, Kurt77++ said...
So do i just put 1 of each of these (100uF, a 10uF, a
1uF and a .1uF) in into the Terminal Block?
I tried just putting in a 47uF but that did not seem to
make a difference,
Also what voltage Capacitors should i use. I cant find
a 5v so can i use a 6.3v?
You could indeed put all 4 in the terminal block but because of the inch or so of distance, it is unlikely the .1uf would have much effect. On the terminal block, I'd just do a 100, 10 and 1 uf.
The voltage of the cap must be > peak voltage applied to it in any circumstance. In design, that value is usually doubled for extra margin. Since the MRX-250 expects a 5V input, the 6.3V should work but doesn't leave much margin. On the other hand, the worst that will happen is the capacitor will fail. A 10V cap is probably best. You can use a 25V or even 50V capacitor but these do get physically bigger as the voltage grows.
In other wrds, if you have one on hand, there's no harm in trying a 6.3V. If you are buying one, try for a 10V or 25V.
Any cap of this capacitance will probably be an electrolytic. Make sure and attach the + side to the 5V screw and the negative side to the ground screw.
How long is your cable run? What are your failure symptoms?
