Posted: Feb 25, 2016
Keyword tags: shortwavetransmitterqrpschematicAM transmitterelectronics500mW
Posted: Jul 29, 2015
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Posted: May 20, 2015
Keyword tags: dayton hamventionham radio
Posted: Feb 13, 2014
Keyword tags: raspberry piarcademakeelectronics
Posted: Dec 24, 2013
Keyword tags: arduinoelectronicsclockRTCshift registers
Posted: Jun 17, 2013
Keyword tags: amateur radioelectronicsmakeDIYmakeRF
If you read my last post, you saw my schematic on how to build a musical Arduino doorbell.
After the doorbell was installed, I noticed that it rang by itself sometimes. Not often enough to be too annoying, but enough to think about correcting the issue at some point. I noticed it rang sometimes when a large appliance clicked on, like the dishwasher or central air, and even sometimes when getting a static shock on a light switch.
My annoyance level went through the roof when a large thunderstorm rolled though one afternoon. During the fifteen minutes of thunder crashing, the doorbell rang by itself six times!
So, what was happening, and how did I fix it?
Posted: May 22, 2013
Keyword tags: arduinocircuitselectronicsdoorbellschematicfilter
Earlier this year my family and I had the good fortune to move to our first home. The home had everything we wanted, except a working doorbell.
The original doorbell button was there, complete with decades of corrosion and wires that were cut between the button and what looked to be some sort of buzzer. Initially, I planned to buy a new chime and button at Home Depot, hook up the wires, and be done with it. The chime selection, however, was sub-par.
Apparently the doorbell market is dominated by ding-dong and Westminster. Growing up, my father built a doorbell that played the first two measures of Pictures at an Exhibition. Maybe I was spoiled listening to this during my formative years, but if I wanted a doorbell that played music, I needed to build it myself.
Posted: Mar 27, 2013
Keyword tags: arduinocircuitselectronicsdoorbellschematiclm386
Posted: Jun 13, 2012
Keyword tags: google voiceland linenumber porting