Scalene triangle altitude formula
Re: Change 7 seg disp. common cathode with common anode Instead of 7404 inverters use Open-Collector inverters - 7406, for example .. If you don't have them use first NPN transistor as inverter and then PNP to drine 7-segment of 12V rail .. see picture below .. Table: Display numbers on a seven segment display in common cathode configuration. A sample interfacing of the 7 segment display to Arduino uno is provided for reference. You can find some sample projects to work on involving 7 segment display here.