Category Archives: project

Mp3DI Continued

I have sample sketches working separately with the mp3 module and the rotary encoder.  The next step is to get them working with some sort of visual indicator.  I think I have enough analog IO to push a 7 segment display.

Where do you find a panel mount xlr connector, a 1:1 audio transformer and a project box for $8?  In a pyle di from amazon.com!

I was going to leave the transformer on the pcb but I need to relocate it to accommodate all the  other bits…..

http://www.amazingtips247.co.uk/2015/11/how-to-play-sound-tracks-with-catalex.html

http://bildr.org/2012/08/rotary-encoder-arduino/

20 Meter QRP inverted V diopile

A BNC to banana plug adapter made a great connector for a dipole.  LMR 100A makes a great light weight feedline with a little creative soldering.  The cord winders were crafted from leftover parts box dividers.  I plan on adding clips to the BNC adapter to change out the dipole leads.  Currently the leads are cut for 14.285 MHz (20 meter qrp calling frequency)  If deployed in a tree the antenna weighs next to nothing.  Today I had it at about 28′ with a jackite fiberglass pole mounted on a speaker stand.

I made QSOs with Nebraska and Texas with rough band conditions.  I’m looking forward to more portable work with homebrew antennas.

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http://www.nonstopsystems.com/radio/frank_radio_antenna_magloop-small.htm

Emergency Power

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I started working on organizing back up power in my shack.  It’s a very basic setup with a trickle charger with timer and a 150 watt inverter. This setup charges a 12 volt marine battery.

It’s not much, but it will keep radios running and cell phones charged in case of emergency.