![]() Your base current for a PNP is is Vdd - Vbe - Vol/220 (5-.6-.4)/220 (first order) 18ma. Most small signal transistors clock in at a min beta of 80-100 so 80ma collector current / 80beta 1ma base current. The driver transistors will see 8 10ma 80ma. Applications of Seven Segment Displays are these displays are commonly used in timers, clock radios, digital. At 10ma/segment, you get 3.1/.01 310ohms per individual segment resistor, call it 300. It means it takes a number in binary form as an input, then displays this number on a 7-segment display using its. Code Example: dirsb = %01111111 make B.0 to B. Interfacing 7-Segment Display Circuit Diagram. The CD4511 is a BCD to 7-segment decoder. This program will read an analogue input on pin C.0 and directly control a 7-segment display connected to the B.0 through B.6 output pins to show a value which represents that analogue level. ![]()
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