Some time ago Reddevil gave me 6 led panels from a led sign. (Story [Dutch] can be read here: http://www.schematheek.net/index.php?p=forum/topic&t=337)
I made a frame from din rail to mount the panels on:
I also thought of how I’m going to make the power supply.
For every 2 panels there will be a transformer, rectifier, capacitor and voltage regulator. The voltage regulator will be a diy one that consists of a 2N3055 tor and a opamp)
Circuit power supply:
The LED sign is going to be controlled by a pc via usb. The usb gets “translated” to the signals for the led panels by this pcb:
All the pcb’s and transformers mounted on the frame:
2 test video’s:
The spreadsheet I used to draw the drawings: https://spreads…NWmdzcUE&hl=en
The next step will be getting the usb interface working. Then I’m going to make a pc program to drive the led sign. Maybe I even include pwm to dim pixels for video.