Hello All,
I recently purchased a few large 7-segment displays from Futurelec:
4": http://www.futurlec.com/LED/7SR40011ES.shtml
5": http://www.futurlec.com/LED/7SR50011AS.shtml
I believe this is the manufacturer: http://www.flyingled.com/pid10476843/NFD-50011ABx.htm, but they have even less information on the display than Futurelec.
I got the 4" to work, no problem except the pinouts don't match.
I cannot get the 5" to work at all. If the drawing is correct, it uses 4 times the number of LEDs (relative to the 4") to make up a segment, two columns of 10 in parallel.
The 4" seems to pull 7VDC at 25mA, not the stated 9.25VDC. So, while limiting the current to 20mA, I've tried applying 9, 11, and 14VDC to every pin in the hopes of lighting a segment to pin it out correctly and verify input voltage. Unfortunately, no dice.
I can try higher voltages, but I don't want to cook the display (by reverse-voltage), especially since I don't trust the pinout given in the diagram.
Any suggestions?
I recently purchased a few large 7-segment displays from Futurelec:
4": http://www.futurlec.com/LED/7SR40011ES.shtml
5": http://www.futurlec.com/LED/7SR50011AS.shtml
I believe this is the manufacturer: http://www.flyingled.com/pid10476843/NFD-50011ABx.htm, but they have even less information on the display than Futurelec.
I got the 4" to work, no problem except the pinouts don't match.
I cannot get the 5" to work at all. If the drawing is correct, it uses 4 times the number of LEDs (relative to the 4") to make up a segment, two columns of 10 in parallel.
The 4" seems to pull 7VDC at 25mA, not the stated 9.25VDC. So, while limiting the current to 20mA, I've tried applying 9, 11, and 14VDC to every pin in the hopes of lighting a segment to pin it out correctly and verify input voltage. Unfortunately, no dice.
I can try higher voltages, but I don't want to cook the display (by reverse-voltage), especially since I don't trust the pinout given in the diagram.
Any suggestions?