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Category : " Clock circuits "

Unusual clock with AT89C2051

Catagory : Clock circuits, MCS-51 Microcontroller
Strangeness of this clock is in its expression of numbers, which is realized using seven Leds. Leds are located inside a pipe, one above another and if we move Leds enough fast left or right, we have a space where we can write numbers, characters or anything else. [...]

Propeller Clock

Catagory : Clock circuits, PIC microcontroller
This is Propeller Clock.A motor spins the “propeller”, and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion, but it works nicely. [...]

Propeller Clock : A Mechanically scanned digital clock

Catagory : Clock circuits, PIC microcontroller
The PIC16F84 that is used is a very basic& cheap FLASH µController from MICROCHIP. It has 13 digital I/O’s of which just 5 are used here. The PIC16F84 has no analog inputs or outputs.The controller is ideal for experimenting because it can be erased and re-programmed 1000 times.For easy time calculation the circuit used a 10.24 MHz Xtal. [...]

DCF77 Clock based on Basic Stamp

Catagory : Basic Stamp, Clock circuits
This application interfaces a DCF77 receiver module to a BASIC Stamp® microcontroller. The DCF77 module receives time information from the standard time transmitter in Mainflingen, Germany. The BASIC Stamp module converts this information to RS-232. Each second it output’s a complete time string at 2400 bps. 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. [...]

Digital DCF77 clock with LCD and gong

Catagory : Clock circuits, PIC microcontroller
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. [...]