EmbeddedRelated.com

Dan Harres (@danharres)

Dan Harres is the founder of Bitstream Technology, a company dedicated to developing health and education electronics. He is the author of the book, MSP430-Based Robot Applications, published in 2012 by Elsevier-Newnes. Prior to starting his own company, he was a Technical Fellow at Boeing Corporation, where he was responsible for the design of fiber optic networks on a number of aircraft as well as a designer of satellite electronics. He is a past chairman for the IEEE Avionics, Fiber Optics, and Photonics Conference and has written numerous technical articles.

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
So what I'm saying is that your infrared LED needs to be on all the time (just like your "test" LED was on all the time).

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
Perhaps this is it - as I understand it, you want to turn on a visible LED (on the Launchpad board) whenever your photodiode sees the output of an infrared LED (driven...

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
Did that fix it?

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
Do you have another Launchpad board you could use?  I've had port pins blown out, probably from static charge that I had when I was handling them.  If no other...

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
Isn't your MSP430 running off 3.3V?  If so, change VCC to 3.3V.  I don't think that will solve your problem but you risk destroying input and output ports by connecting...

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
Disregard my earlier comment.  I think SpiderKenny is correct.

Re: Using IR Photodiode as a sensor

Reply posted 6 years ago (01/05/2018)
I've used MSP430 uCs a lot although not the one you're using.  One question - what resistor are you using to limit the current going into the LED?

Re: Problem of Input voltage for LM4862 audio amplifier

Reply posted 7 years ago (11/21/2017)
With a 0-3V input signal, you should be able to hear an output.  The Rf resistor controls gain of this amplifier and can be increased if you want more output.The...

Re: MSP430G2553 clock speed

Reply posted 7 years ago (05/29/2017)
It sounds like you're using a calibrated DCO clock speed.  If so, the clock speed should be at the specified frequency of 8MHz.  However, this can be off by some...

Use this form to contact danharres

Before you can contact a member of the *Related Sites:

  • You must be logged in (register here)
  • You must confirm you email address