No one has asked what the little modules are so I thought I'd post the PDF describing them.
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Right to Repair
- Thread starter jcdammeyer
- Start date
I always thought they'd be great for paint ball courses. You wear a receiver on your vest with a loud beeper. If you step on a land mine it trips and sends out the message that it went BOOM! Your vest receives this and starts making a noise like something screaming. At this point your mates have to give up fighting and help you back to a specific station where the screaming is cancelled (field hospital) by a special transmitter.
Remember the whole point of anti-personal land mines is to injure, not kill so it takes 3 out of the battle. One injured and two for helping the injured back out of the front lines.
Unlike the Yagi antennas that were used to receive, the vest antenna would have a range of about 5' so people near you wouldn't have their screamer tripped.
I also built 10 that had a large coil inside that could detect an ultra low frequency signal like the type used on the exit of stores to thwart shoplifters. You passed the transmitting coil over the ground and the WORM would trip as if you pressed the button without actually stepping on it. Designed for long term burial to see if they still worked months or even a year later after plants grew back over top.
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Ah yes. General Dynamics. Me too... General Dynamics UK
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One of my antenna designs is on a 1-1/2" dia pc board for 450 & 900mhz range tested to a 1000ft mounted flush to the ground on ultra low power. Sorry can't tell you the application.
Other builds include security systems, wild life tracking, video/audio distribution at major sporting events.
This is just the commercial side of the business.
Other builds include security systems, wild life tracking, video/audio distribution at major sporting events.
This is just the commercial side of the business.
Never did check the range on the WORMs above ground. They were normally buried up to 24" deep and apparently even in wet soil along the Cambodia Thailand border were detected when the demining equipment thrashed over them. Mine are also about 1.5" diameter and in the two lower ISM bands.