Circuits & Schematics Microcontrollers Usage: pic - 9

81. Programmable Home Security Alarm System. Part 2. Calibration and Testing
    Circuits Security Microcontrollers Usage
    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

82. Programmable Home Security Alarm System. Part 1. Schematic
    Circuits Security Microcontrollers Usage
    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

83. Button Code - Single Button Code Entry System
    Circuits Security Microcontrollers Usage
    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
84. High Power LED mood Lamp
    Circuits Microcontrollers Usage Light
    .. components i used for making the led mood lamp. 3 x NPN transistors capable of driving 500 mA, for example the BC337 one PIC 16F628(A) and a programmer a small perforated circuit board 7 x 10K resistors (1/4W) 1/2 watt resistors (2x 22 Ohm, ...
    08-11-2010
85. Digital & Binary clock with thermometer & hygrometer
    Circuits Measurement Microcontrollers Usage
    .. 30, with no effect to minutes, hours etc. The routine is in lines 1878-1887 sec30 . You set the time when you program the PIC. You have to program two times. The first time without line 91 (goto rdtime). The routines setDS and settime is ...
    04-11-2010
86. A Cheap Ultrasonic Range Finder
    Circuits Measurement Microcontrollers Usage Beginners
    .. you need to add a distance sensor to your embedded project ? Build this simple ultrasonic range finder ! This quick dirty PIC ultrasonic range finder will find a place in numerous projects : presence detector, robotics, car parking, distance ...
    02-11-2010
87. Audio spectrum analyzer on PIC32
    Circuits Audio Measurement Microcontrollers Usage
    .. 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
88. USB Small Peripheral Board (aka PIC18F14K50 Board)
    Circuits Interfaces Computers and Peripherals Microcontrollers Usage
    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
89. IR USB on PIC18F2550
    Circuits Computers and Peripherals Microcontrollers Usage
    .. 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
90. 3-Wire Serial LCD using a Shift Register
    Circuits Interfaces Microcontrollers Usage
    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

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