[lasereyes]

i have a few questions. What is a 100kk resistor?
what does p1 and p2 represent? How do I wire a potentiometer correctly?

 

[scompton]

Quote:

Originally Posted by lasereyes /img/forum/go_quote.gif i have a few questions. What is a 100kk resistor? what does p1 and p2 represent? How do I wire a potentiometer correctly?

A 100K resistor has a resistance of 100 KOhms.

p1 and p2 are the 2 channels of the potentiometer (volume control)

I suggest you read here

How to Build the CMoy Pocket Amplifier

 

[lasereyes]

I think i understand now

but the resistor is labeled 100kk, does this mean megaohms? or was it a typo?

 

[Fred_fred2004]

It was a typo

 

[lasereyes]

Quote:

Originally Posted by Fred_fred2004 /img/forum/go_quote.gif It was a typo

ha ha thanks for clarifying!

 

[lasereyes]

can sombody take a look at this cart at mousers

http://www.mouser.com/ProjectManager...sID=062c226da0

and tell me if I got everything right?

also, what kind of potentiometer is correct? i couldnt find any with both channels.

 

[Fred_fred2004]

The electrolytics pick a higher voltage 16volts would be better
film caps use 0.47uF
the resistors you can use 1/4 watt for all of them

do you have - jacks, LED (and resistor), battery clip, switch

The pot - 10K dual ganged, LOG

cheers
FRED

 

[lasereyes]

Quote:

Originally Posted by Fred_fred2004 /img/forum/go_quote.gif The electrolytics pick a higher voltage 16volts would be better film caps use 0.47uF the resistors you can use 1/4 watt for all of them do you have - jacks, LED (and resistor), battery clip, switch The pot - 10K dual ganged, LOG cheers FRED

Thanks! by the way, are mini jacks adequate? that's what my head phones use. im still confused though the film capacitors say .1 micro farad on your diagram?

 

[Fred_fred2004]

The 0.1uf cap is the "traditional" value and I used it to maintain the similarity to the original cmoy, but a higher value will improve the bass response and the 0.47uF is a easily optained replacement. The mini jacks are fine make sure they are stereo and not mono
cheers
FRED

 

[lasereyes]

Quote:

Originally Posted by Fred_fred2004 /img/forum/go_quote.gif The 0.1uf cap is the "traditional" value and I used it to maintain the similarity to the original cmoy, but a higher value will improve the bass response and the 0.47uF is a easily optained replacement. The mini jacks are fine make sure they are stereo and not mono cheers FRED

cool thanks! and are the led resistors the ones already in the schematic or are they wired directly to the led?

 

[Fred_fred2004]

Just use a value between say 4.7K and 10K and wire directly to the LED it just depends how bright you want it to be, in the pictures the resistor is under the heatshrink protecting the led connections
cheers
FRED

 

[lasereyes]

Quote:

Originally Posted by Fred_fred2004 /img/forum/go_quote.gif Just use a value between say 4.7K and 10K and wire directly to the LED it just depends how bright you want it to be, in the pictures the resistor is under the heatshrink protecting the led connections cheers FRED

if i use a super-bright 4.5 volt led do i need a resistor?

 

[Fred_fred2004]

yes you'll be using 9 volts , do you want a torch or an amp

cheers
FRED

 

[lasereyes]

Quote:

Originally Posted by Fred_fred2004 /img/forum/go_quote.gif yes you'll be using 9 volts , do you want a torch or an amp cheers FRED

ha ha thanks. 4.7k it is then. Oh and, where the heck are dip-8 sockets at mousers? cant seem to find them.

 

[Fred_fred2004]

look for IC sockets they should be around there

cheers
FRED