AC.gadget-15Segment: Difference between revisions
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Showing a scrolling text on 15 segment displays (5 digits) I got from a friend IN THE 80s (gasp!). IO multiplexing with three 8 bit shift registers, using PNP transistors to drive the LEDs. Wiring with display took most of the time, followed by the array of transistors and associated resistors for limiting base and LED current. | Showing a scrolling text on 15 segment displays (5 digits) I got from a friend IN THE 80s (gasp!). IO multiplexing with three 8 bit shift registers, using PNP transistors to drive the LEDs. Wiring with display took most of the time, followed by the array of transistors and associated resistors for limiting base and LED current. | ||
[[File:20180615T140339_enhanced,_scaled.jpg|left|thumb|800px|The displays (disclaimer: increased contrast)]] | |||
[[File:20170613T224056.jpg|left|thumb|800px|Wiring on the back of the display board]] | [[File:20170613T224056.jpg|left|thumb|800px|Wiring on the back of the display board]] | ||
[[File:20170802T115858.jpg|left|thumb|800px|The main board with Arduino and ESP8266 removed]] | [[File:20170802T115858.jpg|left|thumb|800px|The main board with Arduino and ESP8266 removed]] | ||
Latest revision as of 12:33, 15 June 2018
AC.gadget-15Segment
Showing a scrolling text on 15 segment displays (5 digits) I got from a friend IN THE 80s (gasp!). IO multiplexing with three 8 bit shift registers, using PNP transistors to drive the LEDs. Wiring with display took most of the time, followed by the array of transistors and associated resistors for limiting base and LED current.
