Category Archives: Uncategorized

Home Automation – Light Switches

Home Automation Disclaimer One of the first things you want to control are the lights. Soon you realize that besides controlling everything from you phone,  you need physical buttons. And if you already has a house with switching boxes, it’s … Continue reading

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Home Automation Disclaimer

In a series of posts I will share my learning in home automation. I did mostly guided by the standard “quick and dirty” (Well, at the end wasn’t so quick). Mostly because I have little time,  I’m very anxious and … Continue reading

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Defectives ESP8266/ESP12

I want to share my very recent experience with several Wemos D1 boards. I hope this will help someone to save time and frustration. This is my history: A customer ask me for 50 units of very simple WiFi data … Continue reading

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Improving fridge thermostat

Since some time my fridge’s thermostat started to work erratically, so I decided to replace it. But, you know, do it in a normal way: go to the spare store, buy a new one, and replace it (2 hours top) … Continue reading

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Religion is dangerous

“Religion is dangerous because it allows human beings who don’t have all the answers to think that they do” Bill Maher

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How to keep fresh basil, parsley and others vegetables

I use to grow some plants (wink, wink), sometimes from seeds, sometimes cloning. To make a clone basically you cut a branch, put in water and wait until it grow roots. Because during the process the plant doesn’t have roots … Continue reading

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High Altitude Balloon – First test

Great night!… I just finished the first integration test of my High Altitude Balloon project, and worked perfect! This afternoon a put all pieces together (well… if we can say that), and test almost everything but get a GPS lock. … Continue reading

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Dirty Power On

I think my high altitude balloon is consuming a lot of (my) resources. But well… another hack related to the same project. My primary communication channel is over UHF, modulating in FSK. But I cant rely in just one communication channel. So … Continue reading

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High Speed Photography

I like photography, and as geek a like to take “tech” photographs. High Speed Photography is one of those. A classic is water balloon exploding, but to freeze the moment when the balloon is exploding we need to understand the … Continue reading

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Pyrotechnic Release Device

My high altitude balloon needed a reliable and lightweight device to release the balloon in the case it remained neutrally buoyant. I saw some implementations with a nichrome wire (melting the rope), but I don’t like it: too much current, big MOSFET, another battery pack. … Continue reading

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