Simple 3D projection for your cellphone using clear plastic sheet

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A very simple 3D holographic projection technique using a clear plastic sheet is described in this instructable from mikroGanesh. You will be amazed at the simplicity of this mechanism and its practicality. Use your smartphone to project 3D holographic images and videos without any modification or 3D goggles. Be mystified by images and videos popping over your smartphone!! All this from a piece of clear plastic sheet

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Atmega328 driven DIY Nixie clock

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Pete Mills’ has shared his cool-looking DIY Nixie clock design on his personal blog. His design is based on Atmega328 and uses software driven RTC and voltage booster to achieve ~175V DC for Nixie tubes. Nixie tubes are cool.  They have great aesthetic appeal with their difficult-to-photograph, warm orange glow, and dem curvy numerals.  They add an organic je ne sais quoi to a hobby with ostensibly digital design cues.  Further, they pose technical challenges in the way of producing and switching the ~175 V DC needed to light each tube element.  And as far as I am aware, there are

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IoT enabled soldering iron

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Vegard’s hacked his soldering iron and made it IoT enabled using NodeMCU, which is a ESP8266-based development platform. Now Vegard’s soldering station reports its set temperature to the Thingspeak server over WIFI. It also sends me Prowl messages on my Iphone when I forget to turn it off. It all started when I needed to fix the display on the Soldering-iron itself after some guys at the soldering-iron factory forgot to mount the segment display properly. The road to IoT is anything but streamlined yet. The NodeMCU & Arduino IDE integration is in it early stages and the tutorials out

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Dual channel battery charger plus analyzer

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K.C. Lee‘s dual channel battery charger is a microcontroller-based efficient switching mode power supply design for not only the charging job but also for determining the charge/discharge characteristics of batteries. It is a battery charger/analyzer. It is not going to save the world from an alien invasion or cure cancer or something equally noble. It is a nice tool for recycling or buying cheap batteries of unknown capacity/performance as it’ll let you test the discharge characteristics. What set this charger design different are: Flexible power source – two independent buck/boost converters allow higher/lower than input voltage. So you could be charging

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DeskPomo to improve productivity at work

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DeskPomo is a time managing machine implementing the Pomodoro Technique  to break down your work duration into intervals of ~25 minutes length, separated by short breaks, to improve the productivity. The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. The technique uses a timer to break down work into intervals traditionally 25 minutes in length, separated by short breaks. These intervals are known as “pomodori”, the plural of the Italian word pomodoro for “tomato”. The method is based on the idea that frequent breaks can improve mental agility. —-copy from wikipedia. As a

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