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Monthly Archives - Nov 2013

Interfacing 7-Segment Display With PIC Microcontroller – XC8

The 7-segment display is the earliest type of an electronic display that uses 7 LEDs bars arranged in a way that can be used show the numbers 0 – 9. (actually 8 segments if you count the decimal point, but the generic name adopted is 7-segment display.) These devices are commonly used in digital clocks, electronic meters, counters, signalling, and other equipment for displaying numeric only data. It is not different from an LED in terms of interfacing, by turning [...]

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PIC Microcontroller Communication with RS232 Serial Bus – MikroC

RS232 serial communication is one of the oldest communication where data is sent or received one bit at a time. This protocol can easily be used to communicate between a PC and various devices supporting this type of protocol like PIC microcontrollers, GPS, GSM modem etc. While other interfaces like Ethernet, FireWire, and USB all send data as a serial stream, the term “serial port” usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with [...]

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Multiplexing of 7-Segment Displays with PIC Microcontroller – XC8

The 7-segment display is the earliest type of an electronic display that uses 7 LEDs bars arranged in a way that can be used show the numbers 0 – 9. (actually 8 segments if you count the decimal point, but the generic name adopted is 7-segment display.) These devices are commonly used in digital clocks, electronic meters, counters, signalling, and other equipment for displaying numeric only data. It is not different from an LED in terms of interfacing, by turning [...]

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Pulse Width Modulation (PWM) with PIC Microcontroller – XC8

Pulse width modulation (PWM) is a technique of controlling the amount of power delivered to an electronic load by switching ON and OFF a digital signal. This is the simplest technique that can be used to produce analog voltages from a digital one. The fraction of the period for which the signal is ON to the total period is known as the duty cycle. The average DC value of the signal can be varied by varying the duty cycle. The [...]

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PIC Microcontroller Communication with SPI Bus – MikroC

The SPI or Serial Peripheral Interface is a synchronous serial communication and allows multiple devices to communicate with a micocontroller(s). There are many devices that support the SPI protocol and can easily communicate with a microcontroller via SPI: A/D converters, D/A converters, SD Cards, DS1306 Real Time Clocks, MAX7219 serial display drivers, 25LC256 Serial EEPROM, etc. The devices dont have to be identical as long as they support SPI protocol. MikroC Pro for PIC

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PIC Microcontroller Communication with I2C Bus – MikroC

The I2C or Inter-Integrated Circuit is a serial communication and allows multiple devices to communicate with a micocontroller(s) over only two wires. The devices don’t have to be identical as long as they support I²C protocol. Communication takes place from the master (PIC) to the individual selected slave only as shown in this illustration, the master sends data to the slave address 2 only. I²C with MikroC Pro for PIC

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Interfacing Matrix Keypad with PIC Microcontroller – MikroC

Keypads are small keyboards that are used to enter numeric, alphanumeric or select configuration data to microcontroller systems. Keypads are available in a variety of sizes. The common sizes are 3×3, 4×3 and 4×4 keypads. A matrix keypad is basically a combination of push-buttons in a way to form rows and columns. In this way the number of input/output pins necessary for their connection to a microcontroller is reduced. A 4×3 keypad requires 7 input/output pins instead of 12 and [...]

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