control a preamp with PIC-processor

[Mr. Triatic]

Hi guys and gals!
i´m looking for schematics and possibly software (.hex/.asm) for PIC16F84 or similar..

what do i want it to do?
*switch at least between two different inputs (..relay of course)
*a power-up timer for switching on the tube powersupply (delay ~40 seconds or so..)
*mute switch

so there will be a count of 3-4 button inputs and about 4 outputs on the PIC

any links?
anybody who would like to write a program for me?
-i can program the PIC myself so all i need is the proper code in hex or asm

any help appreciated!!

[jwb]

Are you only considering PICs, or other micros as well? I'm working on an AVR preamp program and would be happy to share.

[jleaman]

Interesting ? Got any schematic's so far ?

[Mr. Triatic]

thanks for reply jwb!
although PIC would be the best for me, since i already have got the programmer for PIC and a handful of 16F84´s... 8-)

(is it difficult to build a programmer for AVR´s?)

[jleaman]

i want to keep an eye on this thread / project because id like to build one also. and p[robably buy a pre - programed pic as im a mac'y and dont use pc : O )

[Neteagle]

Hi,

I'm skilled on PIC programming, and I can write a program in ASM or C .
What the PIC is suppose to do precisely ?
How many input and output do you need ?

NETeagle

[Mr. Triatic]

hi neteagle!
what i want the pic (16F84-4) to do is this;

*at power-up there should be a delay on one pin, about 30-40 seconds, for the tube powersupply or speaker switch-on if used in a power amplifier
(in that way this circuit would be universal for DIY tubes, preamps or amps..)

*two buttons for switching between two inputs (CD/TAPE)
that is two inputs and two outputs from the pic

*one button for mute or any other function i would like, one input and one output on the pic

i would like to use momentary switches, so the output from the pic should change state everytime i press the button, the button should be de-bounced with 20ms or so..

i attached a simple schematic over the PIC with the buttons 8-)
as you can see there would be a total count of three inputs and four outputs (it can be simplified thrue only using one button for switching between the two inputs)

[mcs]

Have you seen the stuff on my website? I could supply you with a cheap chip

Best regards,

Mikkel C. Simonsen

[Mr. Triatic]

thanks mcs, you have a alot of interesting kits and parts!!
but i´m somewhat stubborn, i still want to use a pic processor, in that way i can modify the code and maybe learn myself how to write my own code someday 8-)

[Neteagle]

Hi Mr. Triatic


I have design a simple schematics for your application .

Tell me if it is ok !

@+

NETeagle