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INEXPENSIVE DIGITALAZIMUTH READOUT
ChallengePaul Wade W1GHZ
Digital Electronic Protractor0 to 360°
$16.95igaging.com
Adaptable for Portable Microwavebut
What about Remote Readout?• Inexpensive digital levels have been hacked for
remote readout• Inexpensive digital calipers have RS-232
output– Connect to Arduino for Bluetooth connection to
smartphone– www.yuriystoys.com– Other digital indicators as well – (DRO)
Digital Caliper from Harbor Fright
Let’s take apart a Protractor
Held together by two small roll pins -gently pry apart
Unscrew electronic module
Top of PC board
Bottom of PC board
Bottom closeup
Summary
• No obvious external connection points• Chip is under black glop• Indicator is pair of PC rotating patterns• No contacts – capacitive coupling?• Binary pattern easily discerned from patterns• Can it be hacked?– Steal digital from LCD?– Connect directly to rotating patterns?
Challenge
• Inexpensive digital remote readout for azimuth would be really useful for EME and microwaves
• Some of you have more expertise with microprocessors (PIC, Arduino, RaspberryPi, etc)
• Make one work and make plans available, and I will reimburse parts expense
• And you will be famous
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