Fun With A PIC, LEDs, And A Motor

This is a couple of years old, but I never posted it. So, for posterity, here is my attempt at a 'persistence-of-vision' display. Only 5 LEDs on a spinning arm, and definitely a junkyard build, but effective. I used a micro-switch that was bumped every revolution as my '0 degree' indication, which made a lot of noise and reduced the revolutions a bit. It would have been better if I had used a 'hall-effect' sensor (but I didn't have one) or even an infrared emitter/detector. Next revision?

 

Typhoon Yolanda Relief

If you are considering donating monies for Typhoon Yolanda relief, I would ask you to consider donating to this charity in Davao City.

From a friend of mine who lives in Davao City and works with the Family Circus outreach:
 
It's been an honor to work with Darrell & Sandy Blatchley as well as their son Darrell every week at the Family Circus outreach to the poor of Davao City. I need to ask those of you who pray to remember Sandy & Darrell, Jr. They are on their way to the areas struck by the typhoon. One of their tasks will be to handle bodies of the deceased. This is a potentially dangerous mission, because there's the possibility of violence as rescuers meet desperately hungry survivors. Again, I'm honored to know them, & again, please pray for "DD" & his mom.

Homepage: http://familycircus.org/
Donations: http://familycircus.org/html/donations.html

Baby Crib Toy

My wife and I are enjoying the company of our new son - Ethan Christopher - who is almost 3 weeks old. We bought a crib for him the other day with one of those wind up crib toys that he can watch and listen to and (hopefully) be entertained.

The problems are:
1) It needs to be wound up. Constantly. If it stops, Ethan cries.
2) It only has one song.
3) There is no control of the song volume.

So, I am going to take the 'Cat Ball' design and make a crib toy out of it. Hopefully I can find all of the bits and pieces I need to do this project.

Plus, my lab is a mess. Actually, my lab is now a big messy pile of junk in one corner of the old flat. We turned the new MadLab office space into our bedroom, because we were able to easily seal off the room and add air conditioning. Which means before I put the project together, I have to put the MadLab back together first. Somewhere. I haven't figured out where, yet.

Apologies For The Lite Blogging Lately

I've been under the weather and we have also be doing some more construction around the MadLab, so not much opportunity to hack or post. But - the MadLab patio/kitchen is looking _much_ better

FM Radio (PIC12F1840) Using A TEA5767 or RDA5807P Module

UPDATE 13.0209:Here's some links for information about the RDA5807P and module:
RDA5807P Datasheet
Quick Info Sheet on a RDA5807P module. It does NOT look like the one I am using.
RDA5807 Programming Manual - unfortunately, it's in Chinese

And here's some links for the TEA5767:
TEA5767 Application Note
TEA5767 Datasheet

The RDA5807 can operate in native (RDA5807) mode or emulate the TEA5767. So the datasheet for the TEA5767 is a good source for registers and bits.


ORIGINAL POST:
Here's a quickie project using a PIC12F1840, an RDA5807P module (although a TEA5767 module could be used), a 2x16 I2C LCD module and an IR receiver. FM Radio! I haven't played around with all of the module settings yet - but I have power on, power off, scan up, scan down, mute, and toggling HLSI mode.