Table of contents
1) Problem
2) Failed attempts
3) Final solution
4) Usage
5) Knowledge Sharing
1) Problem
In the previous article "Using PWM control of DC motor as an example to build a simple 51 project framework", we have introduced a packaged 8-bit 8-segment digital tube driver (as shown in the led8.c file in the FUNC folder in the figure below).
However, the driving circuit needs a certain hardware foundation (as shown below): such as 2 74HC573. I only have a few 4-bit 8-segment common cathode digital tubes and no 74HC573, so I have to find a solution to drive it directly with 51!
https://github.com/beautifulzzzz/stc89c51-or-stc89c52
Previous article：51 single chip microcomputer PWM DC motor speed regulation
Next article：Take PWM control of DC motor as an example to build a simple 51 project framework
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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