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Chris Chung’s entry to 2015 Hackaday Prize is a MSP430G2553 powered DIY calculator that executes microcodes for Hewlett-Packard old-time HP-21, HP-25C and HP-33C calculators.
DIY calculator that emulates HP-21, -25C, and -33C calculators
Rohit Gupta writes about his MSP430 powered IR remote control that he uses for room automation to control a mosquito repeller and a RGB mood light in his room using a Sony TV remote.
MSP430 based IR remote control
Buzz..Buzzzz..buzzzzzzzz .. That is how a lone mosquito irritates you in the middle of the night trying to convince you that his lullaby is helpful. Insignificant or not, But truly that is the underlying inspiration for this project. The Mosquito repellents have this obnoxious smell that I would not like to sleep in and these loner mosquitoes who just piss me off by buzzing in the ear, you have to choose a lesser evil. Obviously, I turned ON the repellent and in a while it goes off but the smell starts building up and I am too lazy to turn it back OFF, leaving the warmed blanket on a chilly Delhi December Night. The nocturnal dilemma .
So, why not just use a remote to turn it back off and maybe add some other things like Reading Light control, Mood Lighting?
Interesting !!
Having the above in mind I thought of building my own Room Automation and Mood Lighting controller and for this time make it look good and “no mess visible”. I had bought some nice overpriced project enclosures a while back and the bigger one of them would be perfect for the project.
Dimitri from Stuttgart, Germany has made this automatic fish feeder for his special fish who needs extra care for not being overfed. So he wanted a fish feeder with reliable portion control, which he found missing in most of the existing automatic feeding devices, leading him to make one by himself. He used MSP430 as the main controller in his automatic fish feeder. A stepper motor driven by L293NE is used to control the mechanics of automatic feeding and portion control. Three tact switches are used for user inputs, whereas for visual indication of the device functioning, three LEDs are also included. Although he has found his fish feeder working smoothly so far, he is planning on doing a real test during the upcoming Christmas holidays when he will be gone and his fish feeder will be the sole caretaker of his fish.
Automatic fish feeder with portion control
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