I have a 2 motors rc car 2.4ghz with mx1919
, it is design at 4.8volts. I put 6 volts batterie and it doesnt work. It work when i disconnect one of the motor. I think it too much amps. What can i do? Can i replace the chip for one with higher power?
The 2.4GHz radio probably need 4.8V, that's why it did not work.
So unless you rewire the whole thing so the radio and motor driver can run on different voltages, there is not much you can do
I looked at it and the radio works at 6 volts , i can rotate front wheels, i can drive one motor at a time.but when i connect the.2 motors nothing rotates but steering still works
Well the MAX1919 uses 2 different voltages, one has a limit of 7V and the other is 10V
I can't explain why only one motor works.
Does everything still work OK if you go back to 4.8V?
it is mx1919 or your project?
The mx1919 datasheet : "Maximum power supply voltage VDDx(MAX) 10V.
Yes it is working back to 4.8 volts
I think it maybe related that at 6voltd it draws more current and it trip on the amps safety?
It is mx1919 on the board
That is possible but the MAX1919 will turn-off all the motors not just one, so there is something else going on.
At 4.8.volt with the max amp chip at 2.5 amp it means
1.92 ohms, then if i report it to 6 volt it means 3.125 amp which is over the max current of 2.5. Maybe thats why it run at one motor and not 2 motors because the amp load is cumulative for both motors
According to the datasheet if one motor causes the IC to overheat, both motors will be shut off not just one. However, the datasheet I'm reading was obviously translated from Chinese and is a little confusing.
What kind of 6V battery are you using. Maybe your battery can't supply enough current.
Im.using lithium battery with much more power and mah capabilitie than the previous metal.halide ones
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