Zhuo Qing teacher Hello, this recently when I drive in debugging hardware part, found a similar "metaphysical" problem, for a long time do not know what the problem is, so that you wanted to ask. When tested individually, the entire board performance is completely normal, but as long as one plus duty cycle, the whole car is not normal, is the only way to square wave, you will find two wheels are transferred, sometimes do not turn me in Weld think it would not be a problem then, but if Weld Why, then directly to a DC signal, the entire board and completely normal yet.
Zhuo teacher Hello, yesterday I asked you to the students about hardware problems. After my debugging today, there are some problems to solve, and now there is only one problem.
Will it signal interference problem?
Operating voltage is 13V, it is satisfied. Therefore, the signal is also satisfied with the second point to a square wave signal generator is 3V3. If the square wave goes directly to the entire circuit IR2104 it is completely normal. After long isolation chip will be problems mentioned above.
Now I'm not in the lab, but I was tested, the first this year to buy the isolation chip 74LS244 default output is high, if a square wave input pin, then the corresponding waveform output pin is normal, but with o output pin will output a certain square wave goes low approximately 1V. We drive directly 74LS244 2104.
The question now is to directly drive a square wave signal given IR2014, two working properly. But by the time the LS244 will find the way in which the work will lead to another way of reversal.
By the time it needs to check the stall for another forward step by step all the way from the bridge circuit, 2014, LS244, etc. look to see that an abnormality has occurred to the signal.
