Microchip PIC Page
But is still of interest to me and seems to be a popularly visited page (As a mater of interest I'd like feedback from anyone who finds this page of interest and where it is used/linked from/indexed at etc.)
I have started to draw the schematic of the circuit prototyped as best I recall it... See below...
Thanks Fred Houweling, now onto the mostly original content...
Please note, All price's quoted are a guide only, Suppliers prices may vary. Prices in
Australian Dollars Inc GST current as at 11/7/2001.
This page is still a bit mumbo jumbo, Once again time is the issue.
Finally I have done some PIC development, It's taken a lot of reading and a fair amount of thinking and even a PIC casualty (Yes they can die, But that story later), But my first test project finally works. It's based on the PIC16F84 my test goal was to flash two leds, On controlled by interrupt, The other controlled by the main code. I will soon include source code and a schematic (If I can find a decent capture program that does not cost anything).
My current prototype is pictured above, Including 8 Pin serial ADC connected to a thermal sensor.
Finaly I have found a program that sort of does what I need but it still very clunky, the schematic as I can remember it so far is dipicted.
A data sheet for the TLC548 chip is located at http://focus.ti.com/lit/ds/symlink/tlc548.pdf
Local copy here
Follow this link for the current code.
Use this link to download the current HEX code.
RS232 and the PIC
I'm interested in making the little PIC chip talk RS232 for a number of potential projects, In this quest I found a few sites that mentioned to just use a high enough value resistor to limit the current into the PIC, They did not go into detail and I did not know enough of the RS232 spec. Well I guess I picked too low a value because my poor 20Mhz chip (Cost me about $18) blew up.
I will be placing a number of home made projects here, Once I do some more development on them.
I have 16F84's, 16F877's and 12C209's (JW) and from time to time will be performing experiments on them.
My first project will be to do with a Power up and down delay timer for use in UPS systems where boot order and shutdown (Load shedding) is critical.
I will post more information as it is presentable.
I have PIC code that displays strings to a LCD screen over a 2 wire interface, I'm willing to share, but am out of time right now, if interested send me encouragment/reminders using the feedback link.
Copyright (C) 2000-2020 By Fred Houweling
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Last Page Edit: 28 February 2012 05:54:56 PM