11 replies to this topic

[spongebue]

when you need a capacitor for something, is it ok to use one that has a greater uF value than what you need? I need a .068 uF capacitor but I can't find them at radio shack

[Bryan]

spongebue said:

when you need a capacitor for something, is it ok to use one that has a greater uF value than what you need?  I need a .068 uF capacitor but I can't find them at radio shack

It depends on the application. Sometimes you need to be close (i.e. a tuned filter circuit), sometimes you only need to be in the same ballpark (power supply bypass caps). What is it used in? If you need the .068 value, you can always put 2 in parallel that equal close to that value.

-Bry

[spongebue]

The 2600 needs a .068uF cap for the paddle, which I desoldered for a project I am working on, but one of the wires sticking out popped off.

If anyone has a broken VCS and wouldn't mind sending me that cap, please PM me.

[Bryan]

Ah, it would be a good idea to stay close to that value. Get a .047 and a .022 and put them in parallel for .069uF.

-Bry

[Stephen Moss]

bryede said:

Ah, it would be a good idea to stay close to that value. Get a .047 and a .022 and put them in parallel for .069uF.

        -Bry

I would have thought that if Radio Shack stocked 47nF and 22nF caps then they would also stock 68nF as its a standard value.

[Stephen Moss]

bryede said:

Ah, it would be a good idea to stay close to that value. Get a .047 and a .022 and put them in parallel for .069uF.

        -Bry

I would have thought that if Radio Shack stocked 47nF and 22nF caps then they would also stock 68nF as its a standard value.

[Bryan]

Stephen Moss said:

bryede said:

Ah, it would be a good idea to stay close to that value. Get a .047 and a .022 and put them in parallel for .069uF.

        -Bry

I would have thought that if Radio Shack stocked 47nF and 22nF caps then they would also stock 68nF as its a standard value.

Nah, it's pretty slim pickings over there. I'm looking at their web site, and it's worse than I thought...

It looks like catalog numbers 272-1066 and 272-1068 should do the trick.

-Bry

[deathtrappomegranate]

These guys appear to have those capacitors for low $, but I've never used this retailer.

http://www.action-electronics.com/

[DanBoris]

You can also get parts from JDR Microdevices:

http://www.jdr.com/

They have been around for a long time and are quite reputable.

Dan

[Atariman]

you might also try www.mouser.com

they have a ton of stuff on their site and it tells whether it is in stock, etc. Good shipping time, but the shipping, however, is pricey.

[spongebue]

I got the caps, and because I am an idiot who hasn't had an electronics class yet, I need to ask this question: is parallel when you have one cap and then another or when you have 2 wires coming from each point and a cap at each wire? or am I a complete moron and it is something else?

[EricBall]

spongebue said:

is parallel when you have one cap and then another or when you have 2 wires coming from each point and a cap at each wire?

Series is like a train or chain with "output" of one connected to the "input" on the next. The wires only connect to one component each.

graphically: -||--||-

Parallel is beside each other, with all of the "outputs" connected together and all of the "inputs" connected together. The wires connect to all components.

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