This is a very simple breadboard test circuit for th HPDL1414 Bubble 4 Digit 16 Segment Display.

Test Circuit

Diagram

HPDL1414 Pins

References:

• Bought a 10 pack on AliExpress: 10PCS/LOT HPDL-1414 HPDL1414 IC
• The Youtube Video: Test circuit with NanoV3 and HPDL1414 4 digit bubble led 16 segment display
• Another YouTube video: From Start To Finish: HPDL-1414
• Hackaday: Arduino Pro Mini - DL1414
• Arduino library for DL1414 (https://github.com/burakozhan/DL1414)
• HPDL1414 Datasheet (http://pdf.datasheetcatalog.com/datasheet/hp/HPDL-1414.pdf)