SCHAER+ : 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...

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

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

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 PIC18F2620 ... PIC16C66 PIC16C72 PIC16C745 PIC16F84 PIC18F876 ... ...