LCD contrast/Bright Trimpot

Parts Questions
1

Ok, I’m trying to find those trimpots at my local electronic store, and I try to find the one that will fit SmashTVs PCB.

The one in my catalog that fits is rated “1 meg Ohms”

On the smashtv pcb site it says “10k”

is that the same thing ?

Also I can’t find a 1.5a 800v Bridge recitfier, the closest is 1.5A 600v

Will this do the job ?

Thanks

Nat

2

Hi Nat

use the 10k ohm (this is 10 000 ohms) where as 1 meg ohm is equal to 1 000 000 ohms. It’s a very good idea to get use to these prefixes as the world of electronics is full of them. Here is a table of how it works.

Perfix

M (Mega)       =1 000 000

k (kilo)           = 1 000

m (milli)         = 0.001

u (micro)       = 0.000.001

n (nano)       = 0.000 000 001

p (pico)        = 0.000 000 000 001

i.e  10k ohms = 10 x 1000 =10 000

     10M ohm = 1 x1 000 000 = 1 000 000

The bridge recitfier rated at 600v@1.5A will be fine, remember that only 9V-12V is going in to the midibox and 1.5Amps is a pretty large current, therefore it is unlikely your midibox will draw the amount of current.

Rowan

3

Thanks !

Nat

And can the 2200 uF condenser be any wattage ?  They don’t have 16v at my store.

Thanks,

Nat

4

Hi Nat

Caps ( capacitor or condenser, they are the same thing) don’t have wattage rarings because they don’t consmue real power. The important spec is the voltage rating (as well as the value of capacitane, in Farads). 16V is a conservitive value, but should be considered as  minium.

Look around is other stores, someone is bound to have one. Remeber allways to buy at least one more than you need.

Rowan

 

5

Ok, so anything larger than 16v will do the job ?

6

Yes, its the maximum voltage the cap can take.

7

Thanks, sorry for being such a newbie :slight_smile: