Hi All
I am new to this forum and the reason behind joining is a problem I have been having with a seven segment display circuit.
I have attached am image file titled Untitled.png. This is the circuit diagram showing a common anode seven segment display attached to 12V power supply with GNDs attached ULN2003.
ULN2003 is attached to a shift register 74HC595. Apologies for not labelling these ICs on the schematic.
74HC595 is receiveing Serial, Clock and Latch data from an Arduino.
I am not posting the Arduino code here because I have tested the circuit on 12V with single LEDs and a 1/2 watt resistors and the code is working fine.
All I am esstentially trying to do is make the seven segment count from 0 to 9. The second file attached is the led array.png. This is the schematic for each of the seven segments in the seven segment display. The problem I am having is that the display while while cycling through the numbers 0 to 9 goes blank instead of displaying 8. All other digits display properly.
I am using a 12V power supply at 2A.
Any help will be really appreciated.
Regards
Taimoor
I am new to this forum and the reason behind joining is a problem I have been having with a seven segment display circuit.
I have attached am image file titled Untitled.png. This is the circuit diagram showing a common anode seven segment display attached to 12V power supply with GNDs attached ULN2003.
ULN2003 is attached to a shift register 74HC595. Apologies for not labelling these ICs on the schematic.
74HC595 is receiveing Serial, Clock and Latch data from an Arduino.
I am not posting the Arduino code here because I have tested the circuit on 12V with single LEDs and a 1/2 watt resistors and the code is working fine.
All I am esstentially trying to do is make the seven segment count from 0 to 9. The second file attached is the led array.png. This is the schematic for each of the seven segments in the seven segment display. The problem I am having is that the display while while cycling through the numbers 0 to 9 goes blank instead of displaying 8. All other digits display properly.
I am using a 12V power supply at 2A.
Any help will be really appreciated.
Regards
Taimoor
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