Posted on 01 Aug 2008
Here is an extremely simple and low cost Sine/Square wave generator based on the Analog Devices AD9835 Direct Digital Synthesis (DDS) Generator chip. The frequency can be set for any frequency from 1Hz to 10MHz in 1Hz resolution steps! All this with three push buttons and a novel “sliding window” LED display. The controller chip is a Microchip PIC16F628. [more]
Posted on 13 Jul 2008
With this digital DCF77 clock with LCD and gong,you always get the right time and date.This project make use of a PIC16F628(A) and a DCF77 receiver.The DCF77 is a longwave time signal and standard-frequency radio station. Its primary and backup transmitter are located in Mainflingen, about 25 km south-east of Frankfurt, Germany. It is operated by T-Systems Media Broadcast, a subsidiary of Deutsche Telekom AG, on behalf of the Physikalisch-Technische Bundesanstalt, Germany’s national physics laboratory. DCF77 has been in service as a standard-frequency station since 1959; date and time information was added in 1973.[more]
Posted on 03 Jul 2008
This project is a 3-digit digital thermometer easy to build for beginner or hobbyits.PIC16F628 used to read digital value of temperature from a DS1820 sensor.All 7-segments drived by power logic 8-bit shift register TPIC6B595 with open collector output. For the 7-segment need 12V volt to drive because it have 3 LED per one segment.All segment no need to scan display. Source code programming with CCS C Compiler availible. [more]
Posted on 03 Jul 2008
This is LCD Clock/Calendar based on PIC16F628.Time and date are displayed on LCD 1×16 in format HH:MM:SSx mmm dd, where: HH = Hours MM = Minutes SS = Seconds x = AM/PM mmm = Month (Jan, Feb, Mar) dd = Day.[more]
Posted on 12 Jun 2008
This is a test project built hastily on a solderless breadboard. It uses a LM75 to read the current temperature via I2C and displays the result on three 7 segment displays. It uses a PIC16F628 with an internal 4 Mhz clock.The program was created using JAL.[more]
