Introduction Bot Ross is a moderately sized 2-D contour plotter, capable of drawing images with a resolution of roughly 1 mm. The design consists of a pen with degrees of freedom in the x and y directions, actuated using threaded rods controlled by two stepper motors. The pen may be raised or lowered using a […]
Code to make a 12F675 operate as a D-type or JK-type flip flop Since I implemented a D type flip flop using the PIC Logic Elements I thought I might go the other way and implement an entire D type flip flop in a single PIC. This uses the edge triggered and port change status
PIC12F675 microcontroller as Flip Flop Read More »
We designed a power monitor that could communicate with the PIC32 through UART to give both power and current readings for any device(s) (that use NEMA plugs) plugged into our box. These readings are then accessible on a website interface, on a graph. We chose to do this project because of the growing issue of
Introduction Real world applications often call for controlling small to medium sized DC motors from digital circuits. For smaller motors it is usually economically infeasible to buy a commercial speed controller as the cost of the controller will far outstrip the cost of the motor itself. The PIC’s high speed, low cost, and low power
PIC Based Speed Controller using PIC16C54 Read More »
Introduction The purpose of this lab is to build a machine that alleviates the process of distributing cards in gameplay with a given set of players in random order. Our team has successfully built a prototype of such a device that takes in a deck of cards and randomly distributes them among players and deposits
Play Your Cards Right Read More »
Introduction In this project, we implemented a two-degree-of-freedom ball balancing platform using a resistive touchscreen, two servo motors, and PID control. We used a PIC32 microcontroller to read position data from the touchscreen and drive the servos, adjusting the platform’s angle. We tuned the system to balance a 1 inch diameter steel ball using a
A Two-Degree-Of-Freedom Ball Balancing PID Controller Read More »
Background DDS stands for Direct-Digital Synthesis. This synthesizer is simply a circuit that can create a sine- wave signal from a reference crystal and a programable frequency-register. All this circuit needs is a reference oscillator (crystal) and some filter. See fig above: A crystal oscillator (50MHz in my case) is connected to the input (Clock
Direct Digital Synthesis (DDS) using PIC16F84 microcontroller Read More »
DDS (Direct Digital Synthesized) VFO seems to be very popular among amateurs in last few years, mainly thanks to cheap and easy available single-chip DDS synthesizers. There are plenty of different amateur designs, some of them also available in a KIT form. They mostly use Analog Devices AD9850 or AD7008 single-chip DDS system to generate
DDS/PLL based VFO synthesizer using PIC16F876 Read More »
Introduction The aim of this project was to produce a portable ECG monitor that displays the ECG signal of an Einthoven triangle configuration of electrodes (3 leads). The motivation of this project comes from the pervasiveness of cardiac problems in the world, which cause the highest number of death, as well as the relatively uncommon
Single-Supply Portable ECG Monitor Read More »
A simple rotating display. Just spin and enjoy. While the “Air display” is rotating, it writes the message on the air. Because the “persistence of the vision”, you will be able to read the message. Here is the circuit: Download the HEX file HEREProgram the PIC with this HEX file. (Use right-click and “Save as”)
