When the PIR is turned On or Off "PIR ON" or "PIR OFF" is displayed for a few seconds on the word clock display. The worded temperature has been removed from the clock display and a linear seconds display added to the bottom row of the Word, Digital & Analogue clocks.
AMAZON WORD CLOCK SOFTWARE
Credits display modified from the "Catalan" Pijuana" version to show the current software version number, my name and also the year of build. The software is mainly based on the "Catalan" Pijuana version of the word clock so this has been translated into English for the display. Synchronisation pulses are displayed on the main display. If no synchronisation pulse is available the clock will free run using the RTC. Synchronisation to my master clock system every minute on 30 seconds. These boards come complete with all components.Īn Arduino Nano is used to drive the clock due to its small size.Ī PIR sensor module is used to shutdown the display when no one is in the room (this can be disabled to keep the display always on).Ī trimmer resistor is added to the circuit, accessible from the bottom of the clock with a small flat bladed screwdriver to calibrate the automatic display brightness.
AMAZON WORD CLOCK DRIVER
The display driver boards for the MAX7219 I/C use modified LED matrix boards. The main display is built direct to the display LEDs with no PCB so any size display is possible.TTP223 Touch Sensor Modules are used instead of Azoteq IQS127D mounted on the main boards. It also means I can use prebuilt maintenance friendly modules without surface mount ICs on the MAX7219 boards.
This extra depth has allowed me to use a hand built LED matrix and wiring looms rather than 4 large PCBs. Due to the setback of the rear 14mm panel and the 1.5mm setback of the glass panel from most angles the clock only looks 14mm deep. The Wouter Devinck clock is just 20mm deep including the 2mm glass whereas my clock is actually 34mm deep including the 4mm glass and 2mm dust seal on the rear. The rear sheet is 10mm smaller than the front sheet on all sides except the top so the clock appears to be only 14mm thick. Very large wall filling clocks can be built using hand built LED matrixes. Hand building the LED matrix as in my clock needs space and 500mm x 500mm is a good starting point as this can just about accommodate the large wiring looms needed to interconnect the LEDs and display modules. Building the LED matrix on PCBs with surface mount components allows for very slim clock bodies and makes the display construction simpler but above 500mm x 500mm the PCBs start to get expensive. These clocks are quite complex to build due to the number of connections in the matrix display. With the 256 LEDs to play with there are huge amounts of different display modes available. They often tell the rough temperature in words like warm, very warm, cold very cold etc.
AMAZON WORD CLOCK FULL
The word clocks with the highest level of complexity use a 16x16 LED matrix giving a full 256 LEDs to control.These clocks have a one minute worded resolution of time as well as morning, evening, night etc. Step 27: Setting Automatic Brightness Levels.Step 26: PIR/Doppler Radar On Off Control.
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