im going to use a stripboard

 

You may find PEBBLE to be a convenient tool for laying out your stripboard before actually trying to build it.

http://www.rev-ed.co.uk/PICAXE/software.htm
Pebble is about halfway down that page; both online and downloadable formats.

 

hi
cool, i was looking for something like that

thanks

 

I hope you'll like using it.

Note that there are two different stripboards available, all the way at the bottom of the list.

It doesn't matter if they aren't exactly the same as what you will be using - just so you can get the layout down.

It may seem inconvenient to only be able to orient things horizontally or vertically, but that helps prevent things from getting messy.

 

hi
heres my attempt at putting it to a stripboard

is was harder than i thought
the board needs to the other way round

 

hi

i wanna make sure i got the right capacitor the .22uf one

what type do i need Polyester or Electrolytic

i have Electrolytic with 22uf 25v on the side but im thinking there not right ones so i thought i better check.

thanks

 

That looks rather messy.

Don't forget that you will need to cut some of the traces in the stripboard to make it work; particularly the traces that run under the opamp.

Metal poly film is a very good type to use.
Ceramic is OK.
You need 0.22uF. You could use a 22uF in parallel if you would like, but you need the small capacitor to make sure that high frequency oscillations don't occur.

 

hi
ive got a .22uf metal poly rated at 275v can i use that?

also is there a better to do this stripboard any tips would be great

even though it was rather messy was it right?

i know that under the op amp i would need to cut the traces but where else?

 

You will need to cut the traces between each vertical components leads. For instance, the resistors you have running north to south, you need to cut the traces BETWEEN the leads, under the resistors. If you do not, the electrons will run AROUND the resistor rather than THROUGH them.

 

another attempt to put the circuit to a stripboard

 

@SgtWookie

could you tell me if the stripboard is any good?

thanks

 

No, it's not.

What is C1? I didn't have that on my schematic. I'll bet your C2 is the one I had on my schematic as C1.

You need to keep the reference designators the same on your stripboard as I had in my schematic.

You have an inverting input tied to ground. It's not going to work like that.

 

hi
you said "Having a 100uF cap across the +19/GND inputs will help to keep things quiet"

thats what c1 is.

"inverting input tied to ground" where have i done this

please help

 

Rather than try to fix your board, I threw this together:

Blue lines are your existing traces.
Red are jumpers.

If you don't see blue, that means to cut the traces on the stripboard.

 

thanks alot sgtwookie really appreciate it

 

hi

got it all soldered up and its working

The voltage coming out of the adapter and it was 19.60v before and then checked V- and V+ and got 9.69v on V+ and 9.89v on V-

is that ok?

thanks

 

Well, using the GND terminal as a reference, your V+ should measure roughly +9.8v, and your V- should measure roughly -9.8v, +/- 5%. (9.3v to 10.3v)

If you are measuring +9.89 on your V-, you have a problem.
If you are actually measuring -9.89 on your V-, then all is well.

 

yes its -9.89v and +9.69v so its all good.

im going to connect it to my amp now

fingers crossed

 

OK.

Remember that in the diagram I posted, by the right electrolytic cap, the black wire from the switched V- goes to the LOWER pad, not the UPPER pad.

 

hi
can i just check im getting this right?

thanks