Krish Posted April 7, 2018 Share Posted April 7, 2018 5v dc motor is not rotating when I connect to pmod ja0 and it is working fine when I connected to vcc and gnd in the pmod ja. anyone can help me .. ??? Link to comment Share on other sites More sharing options...
hamster Posted April 7, 2018 Share Posted April 7, 2018 The PMOD connector pins are not able to provide much power - at best a few mA. You will need to add something to increase the power - either a transistor or MOSFET switch, or maybe a full H-bridge driver. Also, the voltage regulators on the FPGA is only engineered to power the FPGA and a few low power add-ons. So you will need an additional external power source to drive the motor. Link to comment Share on other sites More sharing options...
Krish Posted April 7, 2018 Author Share Posted April 7, 2018 I connected vbe to input ja and. Vdd to vcc in ja and 10k resistance still it is not moving... Link to comment Share on other sites More sharing options...
hamster Posted April 7, 2018 Share Posted April 7, 2018 With a 10k resistance only 0.26mA will be flowing from the emiiter to the base of the transistor. Depending on the current gain of the transistor (maybe 100x) that still only gives 26mA to drive the motor. Use a 330 ohm resistor and see if that helps. That should allow allow around 10mA to pass through the base, allowing the transistor to switch around 1A. Also it is good practice to have a snubber diode over the motor, to prevent it damaging your FPGA board. You may also want to use a NPN transistor, allowing the emitter to be connected to ground, rather than the positive (regulated) power rail. This would be especially helpful if the motor is to be powered by a different supply. Link to comment Share on other sites More sharing options...
Krish Posted April 7, 2018 Author Share Posted April 7, 2018 I will try it ....thanks hamster ... Link to comment Share on other sites More sharing options...
Krish Posted April 13, 2018 Author Share Posted April 13, 2018 Can anyone tell me that It is compulsory to use motor driver to rotate the 5v dc motor....??? Link to comment Share on other sites More sharing options...
Krish Posted April 13, 2018 Author Share Posted April 13, 2018 When I am using 330 ohm it is working thanxs @hamster Link to comment Share on other sites More sharing options...
Krish Posted April 24, 2018 Author Share Posted April 24, 2018 Can I use clk and reset to the motor program ....?? It effects anything on the motor...?? Link to comment Share on other sites More sharing options...
JColvin Posted April 24, 2018 Share Posted April 24, 2018 HI @Krish, I'm not certain what you are referring to; could you attach the code you are using for your motor program? Thanks, JColvin Link to comment Share on other sites More sharing options...
Krish Posted April 24, 2018 Author Share Posted April 24, 2018 It is 5v dc motor it can move by giving one to it..if you want program means I will send it ... Link to comment Share on other sites More sharing options...
Krish Posted April 24, 2018 Author Share Posted April 24, 2018 New Text Document (3).txt Link to comment Share on other sites More sharing options...
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Krish
5v dc motor is not rotating when I connect to pmod ja0 and it is working fine when I connected to vcc and gnd in the pmod ja. anyone can help me ..
???
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