Homebrew PCBs

Thats a pretty standard design.

For the beginner, klook the PICAXE chip. A PIC micro that is programmed in
BASIC, needs only a couple resistors to program, the software is a free
download, and it's cheap. http://www.rev-ed.co.uk/picaxe/

Rather play play around with the 7 segments LED displays and the drivers and
the wiring,, just get one of the low cost LCD's. Brain at Wulfden has some
nicLCDs along with a serial interface. I've used a few of them.
http://wulfden.org/k107/order.shtml

Myc

On Mon, Jun 9, 2008 at 1:36 PM, JB <123@...> wrote:

>   Hi Leon and group
> Here a link to a small component count PIC count-down timer.
> (100 minutes) and only need that relay to add.
> Page is in spanish but explanations in english are at the bottom
> links
>
> http://www.pablin.com.ar/electron/circuito/mc/timer/
>
> Just my 2 cents.
>
> Will look forward to your desing.
>
> Jose
>
> ----- Original Message -----
> From: "Leon" <leon355@... <leon355%40btinternet.com>>
> To: <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>>
>  Sent: Monday, June 09, 2008 3:19 PM
> Subject: Re: [Homebrew_PCBs] Re: HELP: UV Light box
>
> > ----- Original Message -----
> > From: "Howard" <hj.payne@... <hj.payne%40ntlworld.com>>
> > To: <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>>
> > Sent: Monday, June 09, 2008 1:19 PM
> > Subject: [Homebrew_PCBs] Re: HELP: UV Light box
> >
> >
> >> --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> "Leon Heller" <leon355@...>
> >> wrote:
> >>>
> >>> I'm in the process of making the display PCB for my prototype. It
> >> uses
> >>> two 7-segment LED displays and will plug into the little PCB supplied
> >>> with the PICkit 2, and use the supplied 16F690. When the software is
> >>> working, I'll design a PCB for the whole system, with a reed relay
> >> etc.
> >>>
> >>> Leon
> >>>
> >> Hi Leon
> >> Would this design be able to use single side board, as iam not up to
> >> speed on making double side one's ??
> >>
> >> As your uesing two 7-segment LED displays, is the time displyed as
> >> mins or secs, and what is the max time ?. Instead of useing a reed
> >> relay, can it use a dpdt one ?.
> >
> > Yes, it will be single-sided. Time will be in unit minutes and tens, up
> to
> > 99 minutes. I need 11 minutes.
> >
> > I haven't decided on the relay, but I'll accomodate a DPDT one.
> >
> > I've assembled most of the display PCB for the PICkit 2, but I've used a
> > couple of transistors which I didn't have in stock and which have unusual
> > pinouts, I should have them tomorrow. I can then get on with the
> software.
> >
> > Leon
> >
> >
> > ------------------------------------
> >
> > Be sure to visit the group home and check for new Links, Files, and
> > Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
> 
>


[Non-text portions of this message have been removed]