If in Fig. 3.12 a segment current of approximately 4 mA was required, what value of resistor
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If in Fig. 3.12 a segment current of approximately 4 mA was required, what value of resistor would need to be introduced in series with each segment?
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to 7-segment display pins 3,8 pin 7, seg. a pin 6, seg. b pin 4, seg. c pin 2, seg. d < pin 1, seg. e pin 9, seg. f < pin 10, seg. g pin 5, seg. dp Gnd Vin Vb nR 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Figure 3.12 mbed Microcontroller Vout Vu IF- IF+ RD- RD+ TD- TD+ D- D+ 30 29 28 27 26 25 2222 24 23 21
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Fast And Effective Embedded Systems Design Applying The ARM Mbed
ISBN: 978-0081008805
2nd Edition
Authors: Tim Wilmshurst, Rob Toulson
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