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Using the PIC (from 16F54 to 24FJ64)
A PIC (Programmable Interface Controller) is an unbelievably cheap programmable device containing a CPU, some Flash memory (for your program code) and a limited amount of RAM. Low end ('12F') devices can be found on eBay for less than 20p each, contain an 8bit CPU, up to a kb of program space (Flash memory), a few dozen bytes of RAM and 4 to 6 i/o pins (the function of which is under your program control). All have built in timer/counter(s) and most have serial comms (I2C, SPI) circuits and some support 'Interrupts'. Some even have a built-in A-D converter and a dozen or so bytes of EEPROM ! They typically run at 1 MIPS.
Even the 'high end' PICs typically cost less than £5 each, for which you get a 16bit CPU running at 16MIPS (or so), multi-kb's of Flash instruction space (up to about 192kb), a few kb of RAM register space (up to about 8kb) and even some user EEPROM. Designed to run C program code they come with multiple 'built in' support components (such as a 10bit ADC, I2C, UART and even USB !)
However, with the advent of the £4 ($5) Pi Zero, a 'game changer' has entered the programmable device market. The Pi Zero (512Mb RAM, 1GHz +GPU on-board HDMI) is at least 3 'orders of magnitude' more powerful than any PIC device. The future of programmable device DIY projects should be very interesting indeed !
The pages in this topic are :-
+ notes - (links to all my PIC hints and tips)
+ PIC basics == Latest changes (modified 18th Jun 2020 18:15.)
+ Using a PIC - (the basics)
+ PIC16F5x tips and tricks
+ PICAXE Serial link
+ Better PIC instruction set - (mnemonics)
+ New PIC 33 mnemonics - (macro code)
+ PIC overclocking
+ Programming the PIC
PIC in practice
+ Basic ADC resistance measurement - (with the PIC10F206)
+ Variable resistance measurement
+ 16 keypad 4x4 matrix - (using one pin)
+ R 2R 3R DAC - (and servo motor control)
+ PIC low voltage ac motor control
+ PIC PWM - (and AC 55Hz generation)
+ Driving LEDs - (marching display)
+ PIC as a Logic analyser - (16F59)
+ PIC serial output - (RS232 and I2C)
+ PIC serial parallel converter
+ 5x8 character set
+ PIC PS2 Keyboard to serial
PIC RTC
+ DIY RTC - (for a RaspberryPi)
PIC alarm controller
+ Interfacing to a SD card
Astronomical - (PIC)
+ Cooling fan controller - (PIC Project)
+ PIC16F54 StarTrack
+ DSLR star track - (a DIY solution)
+ Barn Door - (code)
+ PIC GoTo - (PushTo)
PIC Video Time Insertion - (OSD)
+ PIC16F5x Video Time Inserter - (VTI)
+ 16F5xx based VTI
+ GPS PIC VTI
+ PIC18F OSD - (VTI)
PIC VGA display
CCTV controller - (using the PIC10F206)
+ CCTV PTZ controller code - (PIC10F206)
Next page :- PIC basics
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