Leon Tromp

Leon Tromp

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Quadrifilar helicoidal antenna - Javascript on-line calculator

Description of the construction of a quadrifilar helicoidal antenna. This model is for meteorological satellites, but a calculator is provided to adapt measure to other frequencies.

the electronic dog repeller circuit produces a discomforting but not harmful

The electronic dog repeller circuit produces a discomforting but not harmful, high frequency sound, audible to dogs but not to humans. Help stop the approa

SignaLinkUSB Mods

SignaLinkUSB Mods

SignaLink USB Troubleshooting

SignaLink USB Troubleshooting

Source VoIP type Skype SIP video conference telephone on m.alibaba.com

Desktop stand android tablet video telephone set with port,android tablet telephone set with port,tablet phone with port,android tablet telephone set

[Hristo Borisov] shows us his clever home automation project, a nicely packaged WiFi switchable wall socket. The ESP8266 has continuously proven itself to be a home automation panacea. Since the ES…

[Hristo Borisov] shows us his clever home automation project, a nicely packaged WiFi switchable wall socket. The has continuously proven itself to be a home automation panacea. Since the ES…

Control Your World With Your Pi Without Programming

This Instructable shows you how to use a simple affordable extension board named PiFace on top of the Raspberry Pi to control the world around you, without any.