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--- projects:paneldrive:start [2021/05/25 19:53]
admin
+++ projects:paneldrive:start [2021/05/27 17:43] (current)
dwheele
@@ Line 3: / Line 3: @@
 Called "panelDrive," a Python app. Approx 2/16/2018.
+  * [[https://github.com/tinue/apa102-pi|Good information]]
-x20 matrix of LEDs, 35 mm centers.
+x20 matrix of LEDs, 35 mm centers. This requires 10 meters worth. https://www.adafruit.com/product/2237?length=1  and also other sources are likely.
 Raspberry Pi Buster on 192.168.0.7 has an additional driver circuit board, with a 4-conductor wire to connect to the matrix.
-  * SN74AHCT125N (QUADRUPLE BUS BUFFER GATES WITH 3-STATE OUTPUTS)
+  * Level Shifter - SN74AHCT125N (QUADRUPLE BUS BUFFER GATES WITH 3-STATE OUTPUTS). This allows the 5V LEDs data lines to be driven by the Raspberry Pi 3.3V outputs.
 {{ :projects:ledmatrix:scn74ahct125nsummary.png |}}

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