I am trying to make a novilty number to be displayed on our post box. I have a dual seven segment display KingbrightDA56-11EWA. Common Anode right hand decimal.
As I wanted to be able to display severalnumbers I am trying to drive the 7 segmentdisplay with a SN74LS47N Which is A BCD 7 Segment display driver Yje Datasheet shows a maximum 15 Volts. Is that the maximum supply voltage for the IC.
I Have Pins 4 & 5 B1/RB0, RB1 ( both on data sheet have lines shownabove them and I have no idea what that means or how to show it here. ) connected to the positive.
Pin 3 LT (Again with a line able it ) can be switched to goto the positive
Pins 1,2 6,7 B,C,D,A Can be switched on to the positive or off .
The pins to the 7 segment display are connected through a 150R resistor. The common on the Display is connected to the +ve.
I have connected a 5 Volt supply andnothing happens.
I have removed the IC and Taken a jumper from the Negative through each resistor and each segment lights up. But Icant get it to work from the IC and nervous to increase the voltage from 5 volts,I cant seemto findthe correct supply voltage.
Assistance willbe appreciated.
Thanks
Rodney
As I wanted to be able to display severalnumbers I am trying to drive the 7 segmentdisplay with a SN74LS47N Which is A BCD 7 Segment display driver Yje Datasheet shows a maximum 15 Volts. Is that the maximum supply voltage for the IC.
I Have Pins 4 & 5 B1/RB0, RB1 ( both on data sheet have lines shownabove them and I have no idea what that means or how to show it here. ) connected to the positive.
Pin 3 LT (Again with a line able it ) can be switched to goto the positive
Pins 1,2 6,7 B,C,D,A Can be switched on to the positive or off .
The pins to the 7 segment display are connected through a 150R resistor. The common on the Display is connected to the +ve.
I have connected a 5 Volt supply andnothing happens.
I have removed the IC and Taken a jumper from the Negative through each resistor and each segment lights up. But Icant get it to work from the IC and nervous to increase the voltage from 5 volts,I cant seemto findthe correct supply voltage.
Assistance willbe appreciated.
Thanks
Rodney