PIC18 programmer

liyf

PIC18 programmer
The SCHAER+ programmer is a programmer for PIC18 family from a PC parallel port (LPT). It is derivated from the SCHAER programmer I used to download my projects in PIC1684. The SCHAER+ programmer should be improved to use a USB connection, without any external power supply...

> Prototype
The SCHAER programmer I'm currently using allows me to program chips like PIC16F84 by managing 5 signals through parallel port :

• VCC : switch ON or OFF the chip to program
• VPP : apply the program power supply on VPP pin
• DATA_IN : serial data transmission (PC -> PIC)
• DATA_OUT : serial data transmission (PIC -> PC)
• CLOCK : clock transmission
  

The original circuit has been design for PIC16F84. A special adpater for chips with 20 and 40 pins has been necessary. The main modification of the layout concerns the activation of the VPP signal, firstly generated by 2 signals.

SCHAER

SCHAER_modified.jpg
SCHAER

SCHAER_modification.jpg

> Design with Eagle
I've rerouted the SCHAER programmer modified for 20 and 40 pin chips. I've done it with Eagle 4.08 demo version, and I've called this new layout the SCHAER+ programmer.
SCHAER+
SCHAER+_printed_cricuit.jpg
SCHAER+

SCHAER+_schematic.jpg
Download the printed circuit and schematic

> Building the board
The programmer exists in a "ready-to-use" state for people who wants to spare time or have some trouble with the circuit. It's distributed by Pagmatec :
www.pragmatec.net
SCHAER+
SCHAER+.jpg
You can program the entier PIC16 and PIC18 families:



PIC18F442
PIC18F458
PIC18F452
PIC18F252
PIC18F6620
PIC18F8720
PIC16C66
PIC16C72
PIC16C745
PIC16F84
PIC18F876
...