Hi Guys building a linear slider with limit switches 12 volt 20 rpm DC geared motor , so start up current is not great 2 amps give or take
I am unable to determin the requirements for the diods any advise would be greatly appreciated. Jerry.
Hi Ron
Its just a linear slider belt driven 12 DC motor start up current around two amps with a limit switch at each end trying to determin the requirements of the diods my electronics is a bit rusty
Hi Ron
Its just a linear slider belt driven 12 DC motor start up current around two amps with a limit switch at each end trying to determin the requirements of the diods my electronics is a bit rusty
OK, but as Jim mentions, several circuits like this use diodes in a few different ways. I can tell you this, if at anytime during operation the actual motor's current will be passed through a diode the diode needs to be able to handle the motor current. I had a few drawings of circuits like this. Here is an example of the limit switches in series with diodes across them. For a 2 Amp load I would likely use a 3 Amp diode like maybe a 1N5404.
The lower example in the drawing does not require diodes with the limit switches. Also keep in mind when using diodes as shown above the diodes will have a forward voltage drop of around 0.75 volts when conducting so in the above example with 12 volts for example applied the motor will see about 11.25 volts. Generally not a big deal and again this is just one example.