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Energy Harvesting Design Challenge

90 posts
doctorcdf

We Have A Winner!

Posted by doctorcdf Aug 20, 2013
Good morning - First and foremost, a big thank you to all of the Energy Harvesting Challenge participants: we have been impressed with the way their ingenuity and efforts have pushed the frontiers of this technology. As ever, it's been difficult to select a winner. Monte Chan has been a dynamic presence throughout this event, and his batteryless wireless remote control points the way to the future. We're glad he continues to experiment with the technology although the competition has formally en ...
Current News The next IDIOTic item is the parasitically powered Inverted MIDI Slave Unit. This unit can be used for lots of different purposes ranging from just a simple status monitor or a device to control lights and the light's brightness, pan and tilt or to drive more complex items such as musical synthesizers and large public displays. The picture above shows it displaying received MIDI messages. Great for testing and diagnostics.   MIDI (Music Instrument Digital Interface) is a ...
Piezo de resistance! Here is a demonstration of a very basic piezo speaker powering the Energy Harvesting Solution To Go Kit.     By bending its diaphragm backwards and forwards by with just my fingers yields over 10 volts peak-peak and enough current to be harvested.   ...
Batteries not included Here's a demonstration of the first IDIOT product. The IDIOT Energy Harvesting TV Remote Control. No batteries required. ...
Today while traversing the corridors of the University, I came across this sign:   It's a promotional sign for the nanotechnology lab of the University of Twente, apparently they're diving into the energy harvesting material science. Although probably not relevant to what they're actually doing, the demo is funny; you can light up each LED corresponding to the peltier tile:   No fancy processing needed here: behind each peltier, a small converter modul harvests the energy and pow ...
A Key Point This is a circuit can be used to support a 4x4 key matrix and be made energy efficient by not requiring perpetual polling. This is done by the use of interrupt inputs. When a key is pressed, the KBINT ISR (Interrupt Service Routine) is launched with then commences keyboard polling to determine which key was pressed, performs the desired action and then goes back to sleep. In the sleep state;      The key rows are configured as outputs where all outputs are pull ...
Sorry for the Interruption to the current Service. The remote buttons are interrupt driven and its supporting code is so simple.     The interrupts are configured using;   /* Setup interrupts */   GPIO_IntConfig (gpioPortB, 9, false, true, true);   GPIO_IntConfig (gpioPortB, 10, false, true, true);   NVIC_EnableIRQ(GPIO_ODD_IRQn);   NVIC_EnableIRQ(GPIO_EVEN_IRQn);   I didn't even have to specify the ISR (Interrupt Service Routine) function names. ...
It's all in the timing! Configuring the EFM32 to produce the correct timing for the InfraRed signals is easy. All the fiddly work has been done and hidden from the developer. All the developer needs to do is include and call upon the Clock Management Unit (CMU) API from the EFM library. For a 1MHz inbuilt Oscillator Frequency we use,      CMU_HFRCOBandSet(cmuHFRCOBand_1MHz);           To derive the carrier frequency we can a ...
Ancilliary Energy Storage Unit As mentioned at the end of Part 001 the EHSTG kit comes with a bank of capacitors can be configured as VSTORE for the LTC3108 TEG energy harvester or as an energy storage bank for the outputs of then energy harvesters (including the LTC3108). http://www.element14.com/community/groups/energy-harvesting-solutions/blog/2013/04/09/a-very-compact-guide-to-energy-harvesting--part-001   This capacitive bank is used to accumulate the energy as electric charge. Wh ...
IDIOT - Intelligently Designed Internet Of Things. Rather than just a single product I am submitting a family of products for the Energy Harvesting Solution To Go Challenge. I've aptly named it the family the IDIOT to mean "Intelligently Designed Internet Of Things".   Why a family of products and not just one? The reason why is because the Energy Solution To Go kit (EHSTG) and its parts are so versatile that the development and commercialisation of a single product would not have done ...
I would like to sum up all the work I have done in one post for those who did not follow this RoadTest and do not want to go through all the posts one by one.   Project descriptionThe other night I was making diner in the kitchen and I saw a blinking red LED on my carbon monoxide detector, indicating that I need to replace batteries. That is when I realized that some energy harvesting technique should do the trick for me next time with a help of some hack. These types of alarms are usually ...
Like Victor, I have finished my movie showing off the project. At the end of the week I will try to sum up what I did and learned during this RoadTest. But right now with no further ado, I present to you the carbon monoxide detector project supplied by energy harvesting.   ...
  Energy Harvesting Solutions: egg timer from Tinkerer on Vimeo.   Hello All! This is my 'grande finale' post in the Energy Harvesting Solutions Roadtest Challenge! It's been a nice challenge, with a lot of technical, well, ehm... challenges!   Thanks! First, I'd like to element14 for organizing this challenge. After that, I'd like to thank Wuerth both for the Energy Harvesting Solutions To Go kit, and for helping me to get a PCB in time, and of course Linear Technology (how do ...
Becoming Deranged In addition to the Expansion connector on its right hand side the STK3700 has perimeter peripheral and signal pins that can be used for connection. To use these easily I soldered on some gold connector pins.   To enable the connection of both e-paper and Energy Harvesting modules the following actions were undertaken; Solder header pins to perimeter connection pads of the STK3700 Relocate e-paper connections from Expansion header to the new header pins.   This ...
After the last time, I've added the following features / bugfixes to my project   Added button handling; one button to reset egg temperature (if inserting new eggs), the other to switch between showing water temperature and egg yolk temperature The button functionality already existed, but I had tho remap it to other pins, and add some wrapper functions Added buzzer output (controlling the VOUT2 of the LTC3108). When the egg yolk is above (calculated) 85degrees celsius, three beeps are ge ...