I am an electrical engineering student in Higher Technical Institute in
Cyprus and probably I will do a project with PICs so I needed a programmer.
The programmer that I built was from a last year's project. It can program
the most of the flash pics from the 16FXX and 16FXXX series.

The circuit uses a buffer ic, the max662, three transistors and the 78L05
regulator the others are some capacitors, resistors and the IC sockets.

Haris

----- Original Message -----
From: "Steve Ruse" <steve@wotelectronics.com>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, October 09, 2001 21:29
Subject: Re: [PIC]:El Cheapo programmer help needed


> Uhhg....the parts for my El-Cheapo should arrive today. Haris, what
> design did you go with after giving up on the El-Cheapo?
>
> Thanks,
> Steve Ruse
>
> > I also built the EL-Cheapo and I was very disappointed. I had the same
> > problems and I have changed the components 2 times just to be sure.
> This
> > circuit seems to be very depended on the PC's parallel port, even the
> author
> > bought a special port for his computer! Also I came to many different
> > circuit diagrams when I have done a search in the internet for the
> > El-cheapo. This in my opinion is a very unreliable design and
> unprofessional
> > to put it as a pcb in book because many people is going to spend time
> and
> > money to built it. It was better to include some more components and
> make a
> > more reliable design.
> >
> > The solution for me was to move on and built another programmer that a
> > colleague suggested to me, which worked at once without problems.
> >
> > Haris
> >
> >
> >
> > ----- Original Message -----
> > From: "jferrero" <jferrero@UNSJ.EDU.AR>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Tuesday, October 09, 2001 14:15
> > Subject: [PIC]:El Cheapo programmer help needed
> >
> >
> > > Hello respectable list,
> > >
> > > I have done a serch on the pic-list archive, but I did4nt found my
> problem
> > > there:
> > >
> > > First, I must say that I built my cheapo on the Myke4s book PCB,
> and tried
> > > it with the CD software and also with the last windows interface
> > downloaded
> > > from Myke4s web site. -PC PII 266 Mhz W95-
> > > I have done the corrections to the scheme (3906 error) and the PCB
> (2N7007
> > > error). Also I have made a new Cheapo on a breadboard, but I always
> have
> > the
> > > same results:
> > >
> > > Step 2:    15,66 V  (OK)
> > > Step 3:    13,10 V  (OK)
> > > Step 4:    5,01 V   (OK)
> > >
> > > Step 5:    High: 4,99 V  (OK); Low: "Build test error: RC Delay
> Line did
> > not
> > > return a low voltage value as expected" although for two seconds
> the DMM
> > > indicates 1,5 V, then 4,99 again.
> > >
> > > Step 6:    High: 4,92 V (OK); Low: "Build test error: RC Delay Line
> did
> > not
> > > return a low voltage value as expected" although for two seconds
> the DMM
> > > indicates 3,36 V, then 4,92 again.
> > > Checked the diode CR5 position, solders continuity; also checked
> R3/R4
> > > resistance and C3 capacitance values, etc
> > >
> > > Step 7:    High: 4,92 V; Low: 0,01 V (OK)
> > > Step 8:    High: 13,31 V; Low: 0,18 V (OK)
> > > Step 9:    High 12,99; Low: 0,01 V (OK)
> > >
> > > Does anybody has experienced this problems?
> > >
> > > Thank you in advance!
> > >
> > > Jorge Ferrero
> > >
> > > --
> > > http://www.piclist.com hint: PICList Posts must start with ONE
> topic:
> > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: -
> >Ads
> > >
> > >
> >
> > --
> > http://www.piclist.com hint: PICList Posts must start with ONE topic:
> > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
> >
> >
> >
> >
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>

--
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