This is yet another digital clock DIY kit for electronics beginners. I have previously published several posts related to the digital clock. This kit is no different from those kits, it also displays time and the additional functions and temperature display and alarm. It also has a photoresistor which makes it sensitive to ambient light, the clock will automatically be brighter during the day than at night. The display is 0.8 inches big. With a transparent case, components can be well protected and the clock looks stylish. It is a perfect kit for electronic DIY enthusiasts, school training lessons, etc.
The kit has a small battery holder to keep the time alive set by the chip DS1302. The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.
The kit works with a 5V power supply. Use a simple 5V phone charger to power up the kit. The kit comes in different colors. The one I bought was in a green color. The kit comes with the schematic and description of the circuit. The best part of this kit is that it comes with an acrylic enclosure also which eventually gives a professional product look to the kit.
Display: 4-digit LED
Power Supply: 3V CR1220 Button Battery (not included)
Working Voltage: DC 5V
Working Current: 40mA
Clock Size: 7 * 2.5 * 1.2cm / 2.76 * 0.98 * 0.47in
IC Board Size: 7.2 * 2.7cm / 2.84 * 1.06in
Kit Weight: 82g / 2.9oz
Package Size: 12 * 8.5 * 3.5cm / 4.72 * 3.35 * 1.38in
Package Weight: 85.5g / 3.01oz
Check out the following images for assembly. You can see all the images on Flickr also.
Check out the following images for assembling the enclosure.
Check out the other images