Re: [CAD_CAM_EDM_DRO] OT controller

ON TOPIC:

Microchip.com has a lot of motor controller chips and a lot of motor
controller (PMDC, Brushless, Sensorless Brushless, AC, 3 phase, and stepper
motor) application notes.

They even have some very high tech motor control chips (the PIC18xxx motor
controllers, and the dsPIC 30Fxxxx motor controllers) Just program them
with the source code from one of the app notes and your are ready to rock.
(Need driver board).

LITTLE OFF TOPIC: (for those of you wanting to build controller circuits
that use PIC16F84's, if you don't understand what I am saying below email me
off list.. mart0784@...)

> The PIC16F84 is a flash part, the 16F627/628 is less expensive.

Yes, It is one of the oldest, most feature deprived PIC Flash part out
there. Only 1MIP and one 8 bit timer, No ADC, PWM, USART, etc. 1K program
memory, and 68 bytes of ram. You can't use an ICD to program it either.

The PIC16F628 has an internal 4 MHz oscillator, or it can use up to a
external 20 MHz clock, it has 2K program space, 224 bytes of ram, 128 bytes
of EEPROM, PWM/Capture/Compare, USART, and 2 Comparators. While being
dollars cheaper then the obsolete PIC16F84

There also is a PIC16F88. It has a internal 8 MHz oscillator (20MHz
external), 4k of program space, 368 bytes of ram, 256 bytes of EEPROM,
capture/compare/PWM, Addressable USART that supports SPI of I2C, 7 channel
10bit ADC, and 2 comparators.

Man that is smoken, for a 18pin PIC16 part.

Other chips to consider are Atmel AVR's, PIC18's, and dsPIC's. As a
beginner I would stay away from DSP's and 32 bit stuff.

Note this before you buy chips to play with, a lot of the PIC16F84
applications you see one the web were written a few/couple years ago. In
the microcontroller industry that is prehistoric. You can still do some of
those apps, but just use a newer, more available, more powerful, and cheaper
part.

At Digikey:

PIC16F88 = $4.58
PIC16F628 = $3.88
PIC16F84 = $5.63 (wow they have a 10MHz version = $7.38)

Jeff Martin

If you don't understand what I am saying email me off list..
mart0784@...