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 ...

Of course, there’s nothing unusual about using 7-segment displays, especially in a clock ... a 3D-printed case and an Arduino Nano coupled with a DS1307 make the clock part work.

Save guides, add subjects and pick up where you left off with your BBC account. Output devices such as motors, solenoids, bulbs, buzzers, relays, LEDs, and 7-segment displays are used in many ...