Picprog as the Pic
programmer. (Compatible with the hardware described below, an RS232-based
programmer requiring no external power supply, simplicity itself...)
Some (private) simple projects that I have messed with, that are not owned
by some company or other are detailed below. In addition, I have
implemented an Electricity Pre-Payment meter using a dual-processor,
multitasking, real-time operating system on two '84s, using RF as the comms
medium. Due to political reasons, this was not marketed, but derivative
products have been, as usual, at no benefit to me :-)
Pic Programmer
I am a minimalist, hence Jaako Hyvatti's
Serial port based programmer hardware is the very simplest on the scene.
No external power supply, One BJTs, three diodes, two caps, two zeners, and
four resistors. It simply cannot be simpler! The compiler I use is
Timo Rossi's Picasm (VERY fast,
wonderful).
The schematic is simple:
Since with so few components I did not bother with a PCB, I wired it all
together, and used my favorite substance: Pratley. Herewith some pics of
the device :-) :-)
Timings
Doing a Real-Time clock or Operating System is not as simple as it sounds.
Some of my Real Time Clock observations are a
little revealing.
