This chip can easily — and cheaply — control eight common cathode seven segment displays. There’s a problem with this plan, though: the LEDs received from eBay are common anode.

This chip can easily — and cheaply — control eight common cathode seven segment displays. There’s a problem with this plan, though: the LEDs received from eBay are common anode.

For testing purpose only one 330 Ohm resistor (R2) is added between ground rail (0V) and the common cathode pins (3 & 8). It is better to directly connect pins 3 & 8 of the display to ground rail.

The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric displays. Each segment in the display module is multiplexed, meaning it shares the same ...

Avago's HDSM-443L is a font size dual digit surface mount seven segment display. The HDSM-443L is a 0.39inch (10mm) font size dual digit surface mount seven segment display, this device with right ...