Electronic Clock DIY Kit, 7 Segment Display, AT89C2051, FREE SHIPPING
This electronic kit uses AT89C2051 microcontroller to control the features of the 7 segment electronic clock. It comes with three dual-7 segment displays to display the time of the day. Brightness of the display can be changed by reducing the resistance of R4-R10.
S1 button is used to set the time. Press and hold the button for more than 2 seconds to go into and exit by pressing it quickly after setting the correct time. The back-up battery(CR2032) is recommended to be used in case there is no power supply. When power supply is cuts off from the circuit, the battery will continue to power the clock but there will not be any display on the 7 segments. When power supply comes back, the display will be on with the correct time.
The electronic parts come in loose form and will have to be soldered to the printed circuit board that comes with this kit. The equivalent parts may be provided and different from shown in pictures.
Basic soldering and electronic knowledge are necessary to assemble this kit.
Parts & Specs
- Working Voltage: 5V - 12V DC
- Recommended Voltage: 9V DC
- PCB Dimension: 90mm X 70mm (3.54in X 2.76in)
- Recommended backup battery: CR2032 (3V DC)
- Electronic Clock DIY Kit
- Package Size: 10cm X 10cm X 2cm (3.94in X 3.94in X 0.79in)
- Package Weight: 0.07kg (0.15lb)
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