Hi, my friend recently asked me to make a clock like LED display. Essentially, it will consist of 4 LED DIGITS like:
[00:00]
and you can set it to say
[12:23] (Note that this is NOT A CLOCK, merely a display)
I am a budding electrical engineer, and haven't really done anything like this (Year 1 College), but decided to try to figure out a way to do so.
My idea is to use a 74HC191 counter with a button to manage the numbers for the digits. The output of the 74HC191 counter will be connected to a BCD to 7 Segment decoder, 74HC48. Then I can just connect the output from the 74HC48 chip to the LED display, and all will be solved.
However, based on my research, the display set that he is planning to get, seems to work on higher voltages than 5V.
[00:00]
and you can set it to say
[12:23] (Note that this is NOT A CLOCK, merely a display)
I am a budding electrical engineer, and haven't really done anything like this (Year 1 College), but decided to try to figure out a way to do so.
My idea is to use a 74HC191 counter with a button to manage the numbers for the digits. The output of the 74HC191 counter will be connected to a BCD to 7 Segment decoder, 74HC48. Then I can just connect the output from the 74HC48 chip to the LED display, and all will be solved.
However, based on my research, the display set that he is planning to get, seems to work on higher voltages than 5V.
- Large (58mm) 7-segment LED display
Digits color can be either red or green.
Type: 12101BEG
If max: 30mA
If peak 1/10 dutycycle, 0.1ms: 100mA
Vf red: 7.2-8.8V
Vf green: 8.8-10.0V
Each segment consists of four LEDs connected in series.