By combining 49 of them he’s put together a soda bicarb diode steering circuit for a 7-segment display capable of showing the digits 0 to 9. He takes the idea for his diode from electrolytic ...

In today's video I want to show you 7 segment display with unique machenism that is our own invention. There are 7 circles ...

Besides, if you want to use them, you need to work with high voltage supplies and worry about not getting zapped while trying to debug a circuit ... a regular 7 segment LED display.