Friday, March 25, 2016

Review of some Android scientific calculator apps

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Just a cursory review of scientific calculators apps that have caught my fancy thus far RealCalc (Been using this for a few years and ...
10 comments:
Sunday, April 14, 2013

Made by monkeys: female headers

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2-mm pitch female headers from--where else but--China. The gold-colored pins have been unwittingly engineered such that they wick up solder ...
1 comment:
Sunday, July 1, 2012

Melody door chime with "dead time"

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Here's a very similar circuit and firmware to the door open/closed detector . However, instead of a magnetic contact (magnetic proximity...

Door opened, closed, and left open too long detector with corresponding melodies for each condition

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The musical candle brought to mind a couple of circuits I designed and built back in 2008 that play a melody when the room door is opened, c...
Wednesday, June 27, 2012

Musical candle teardown

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While in an office supplies store I saw a display rack full of "Singing Candles" and thought it would be interesting to take one a...
Monday, June 25, 2012

Measuring liquified petroleum gas (LPG) levels

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Before anything else, I forgot to mention in in the LPG detection test that I took temperature measurements of the TGS2610 sensor of the LP...
1 comment:
Monday, June 18, 2012

June 6, 2012 Venus transit pics

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Another off topic entry. Should've uploaded these images on the day I took them. Transit began about an hour after sunrise and ended noo...
1 comment: