Analog Style LED Clock
The Analog Style LED Clock uses 180 LEDs to display the time, much like the hands of a traditional analog clock. The clock also features an alarm. An additional LED indicates the alarm status and another LED indicates PM. Four pushbuttons allow you to set the clock and alarm. The clock uses the 50 or 60 Hz from the electric utility to keep accurate time.
The clock has a total of 182 LEDs and a buzzer … all driven by just an 18-pin microcontroller! Plus the controller monitors the 4 pushbuttons and the 50 or 60 Hz line. No other logic, I/O or driving circuits are used. How is this possible?
The kit includes all parts, including printed circuit board (PCB), programmed microcontroller, solder and frame. The frame has a built-in hanger so that it can be hung on a nail, screw or small hook. A printed full color assembly, operation and technical manual is included, complete with theory of operation, schematics and drawings. The manual can also be downloaded below.
Tools required to assemble the clock include a soldering iron, wire clippers, multi-meter, tweezers, and a #2 Philips screwdriver. Additional tools could come in handy as well — for example, eye loupe, solder sucker, or wire strippers. See the user’s manual (download below) for more details.
The frame will need to be painted and numbers applied. A set of Arabic and Roman Numerals are included. Paint is not included. You can use spray paint of your choice of color. See our Photo Gallery and users manual (download below) for other options and ideas.
The clock is designed to plug into a 110V outlet as is used in the United States. If you are outside the United states, you will need to obtain the appropriate adapter. As an alternative, you could use a wall transformer that is made for your country. It needs to have an output of between 9 and 12 volts AC (not DC) and should be capable of supplying at least 100mA (or 0.1A) of current. The clock will detect if it is connected to a 50Hz or 60Hz main and automatically adjusts accordingly.
Note: This kit is not RoHS compliant.