Circuits & Schematics: pic - 3

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  1. Recently I’ve working with the little but smart PIC18F14K50 (or your low voltage version, PIC18LF14K50 ). These chips are cheap (about $2,5 at Mouser) and have low pin count, but very impressive specs: USB V2.0 (low and high speed); NanoWatt ...
    23-10-2010
  1. Rajendra Bhatt HD44780 based character LCDs require at least 6 I/O lines from microcontroller to display data. Therefore, they are not suitable for low-pin microcontrollers like PIC12F series microchips. In this project, I am going to show how to ...
    16-10-2010
  1. .. 1 Schematic Diagram Click to enlarge It started on a bread board , show in image, while i was just playing aroun with a PIC 18F and usb. RS232 was utilized to decode the remote controller protocol,old source code with this function its on ...
    19-10-2010
  2. .. of ADC is set to 1V with potentiometer connected to Vref+ pin of PIC32. Voltage of the audio signal could be negative but PIC’s ADC accepts only positive voltages. That’s why another pot is used to add 0.5V DC to audio signal. ...
    26-10-2010
  3. The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to ...
    17-11-2010
  4. Introduction In this project we design low cost high performance programmable home security system using few LDR's as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF ...
    04-01-2011
  5. Part 1. Schematic Calibration and Testing Once everything is assembled take following steps to calibrate the system, Remove IC1, IC2, IC3 and IC4 from the IC bases. Apply 18V ( to 22V Max.) DC source to the power connector (J3). Check the voltage ...
    08-01-2011
  6. .. board): The picture shows a full-volume 5000Hz sine wave generated by a PC. If we were to feed this signal directly to the PIC we would only have a very small range of input voltage (0-0.5V) and also we would only be able to sample the ...
    18-01-2011
  7. Introduction Heart rate measurement indicates the soundness of the human cardiovascular system. This project demonstrates a technique to measure the heart rate by sensing the change in blood volume in a finger artery while the heart is pumping the ...
    11-02-2011
  8. Part 1. Schematic and construction The firmware is completely written in C and can be downloaded from the downloads section below. The firmware is split into 4 parts: ADC Sampling The ADC sampling routine samples the voltage level on RA0 every 50 ...
    02-02-2011

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