Microcontroller

LC Meter based on PIC16F84A

This is one of the most accurate and simplest LC inductance / capacitance Meters that one can find, yet one that you can easily build yourself. This LC Meter allows to measure incredibly small inductances starting from 10nH to 1000nH, 1uH to 1000uH, 1mH to 100mH and capacitance from 0.1pF up to 900nF. LC Meter’s circuit uses an auto ranging system so that way you do not need to spend time selecting ranges manually. Another neat function is the “Zero Out” switch that will reset the initial inductance / capacitance, making sure that the final readings of the LC Meter are as accurate as possible.

read more source: http://electronics-diy.com/lc_meter.php

Be the first to comment - What do you think? Posted by admin - January 4, 2010 at 12:08 am

Categories: Meter, Microcontroller Tags: 16f84a project, digital meter, LC Meter, PIC16F84

Electronic Die with PIC16F84

Built using a PIC16F84, about 4 hours worth of code and a few bits on a breadboard. This was the first time I’ve worked with PIC’s so it was a learning exercise. I started with the ‘Hello World’ microcontroller equivalent i.e. Blinking LED, then tried the ‘Knight Rider’ sequencing LEDs, and then hacked this together. The code is written and assembled using the Microchip MPLAP IDE V5.70.
Read Source: http://picprojects.org.uk/projects/picprojects.htm#Electronic%20Die

Be the first to comment - What do you think? Posted by admin - June 15, 2009 at 9:06 am

Categories: Microcontroller Tags: PIC16F84

Voltage programmable square wave generator

Here’s another daft yet interesting PIC12F675 idea I came up with. When I wanted to show someone how logic gates worked I could only find a NAND gate which wasn’t very handy for demonstrating AND’s OR’s, NOR’s and ExOR’s. I also wanted to have a play with the A/D converter on the 12F675 so I came up with the idea of a PIC that could function as a single 2-input logic element. The logic function is determined by an analogue voltage applied to the GPIO4 pin when the device is first reset, it isn’t sampled again after this so logic can’t be changed on the fly. The 3 MSBs of the A/D conversion give eight distinct voltage levels that map to specific logic functions.
Read Source: http://picprojects.org.uk/projects/logic/logicelement.htm