29 Mar '13, 12am

Hammond Organ sends messages which can be decoded by a Spectrogram

Hammond Organ sends messages which can be decoded by a Spectrogram

An Arduino was connected to the organ via a UNL2003 darlington array chip. This chip is driving some reed relays which make the organ connections to create the sine wave tones. With that hardware in place it’s a matter of formatting data to generate the target audio. [Forrest] wrote his own Arduino sketch which takes characters from the serial port (pushed over USB by the laptop), maps then to a stored 5×7 character font set, then drives the pins to produce the tones. As you can see in the clip after the break the resulting audio can be turned into quite readable text.

Full article: http://hackaday.com/2013/03/28/hammond-organ-sends-messag...

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Can You be Plastic-Free?

Can You be Plastic-Free?

care2.com 30 Mar '13, 9pm

Mr. Kamp helped to shape my current view of plastic as a resource that requires mindful use and re-use. I am convinced tha...