Need some help please...

studysession

Hi - I was hoping someone could correctly answer a few questions for me.

I understand that I need a resister for this and a capacitor for that. But what I am having trouble on how do I determine what resister or capacitro that I need? Is there a simple formula for this?

I am assembling a DC speed controller that will be controlled using the Basic Stamp. So far so good, but really need a clearer understanding on when to use what size of resister and capaciter.

Thanks in advance.

Chris Savage

Hello,
·
·· This thread is being moved from the BASIC Stamp Forum to the Sandbox Forum.· You might want to search for some general electronics tutorials on Google.· Choosing the correct resistor or capacitor and how you do it really depends on the application.· There is no one formula that fits all cases.· And sometimes it is pure guess work or experimentation.· There are some specific formulas that apply to particular components, such as Ohm’s Law.· There is also a formula for choosing the appropriate size resistor for an LED.· Some require you to know other specific information.· For example the formula for the LED resistor requires you to know the supply voltage, LED forward voltage and LED current draw.· These can be found through Google as well.· I hope this gives you some ideas.· Take care.


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Chris Savage
Parallax Tech Support