How to connect the wires.
The high Vpp is obtained by using the negative voltage to drive the chip. The voltage is stabilized with zener diodes. They do not need any voltage drop or offset current. This makes it possible to use extra low input voltage. Transistor driver guarantee output level > ±3V.
The Programmer supports In Circuit Serial Programming.
D5 and D7 may be replaced by a BC557B. Emitter to MCLR and Collector to Vss.
EEPROM adapter for this programmer.
(Supports Automatic Switch Function and LC types.)
Schematic for the programmer.
PCB for this programmer.
Detailed Funtional Describtion.
Download PIP02 beta driver, JDM84V32.ZIP (5K).
Works with windows too.
Download PIC16C84 utilities, PGM84V28.ZIP (25K).
Download PIC12C508 utilities, P50XV15.ZIP (31K).
New PIC12C508 algorithme, P50XV15S.ZIP (31K).
New PIC12C508 algorithme, slow version, P50XV15E.ZIP (29K).
The utilities is inclusive source. If problems, then use slow version.
Most easy PIC Programmer ever.
Extra lowcost for PIC16C84 only.
Simple programmer for PIC16C84 and 24Cxx only.
How to use the programmer with In Circuit Serial Programming.
Connection to ISO-CARD with Automatic EEPROM Switch.
Which programmer to choose?
You may need a diode in RS232 ground, but 24Cxx programming does not work when connecting a diode. Mail if diode is needed. I am not sure if it is computers that need the diode.
THIS PAGE IS UNDER CONSTRUCTION
How to make a processor with the delay between instructions less than a half nano second in standard 1u CMOS. (GHz instruction frequence.)
Z80 trick: Use RESET, NMI and CLOCK to bootload a romless system (RAM only).