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thestone.zone | ||
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tbspace.de
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| | | | | QO-100, also known as Es'hail-2 is a geostationary amateur radio satellite. It can be used by large parts of the world, including Europe, Africa, (parts of) South America and Asia. The satellite works as a linear transponder. It receives a specific range in the 2.4 GHz (13cm) band and sends it back to earth on 10 GHz (3cm). In order to generate such a 2.4 GHz signal and transmit it to the satellite conventional radio technology with transverters could be used. I chose a different route and planned a fully software-defined setup. This has many advantages: - Cost (PlutoSDRs can be bought for ~120?) - Low power consumption (laptop, SDR, amplifiers), ideal for portable usage - No SSB transceiver needed - Software DSP processing for very clean signals - I/Q samples can be transmitted over Ethernet instead of running long, lossy runs of coaxial cable. | |
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www.pa3hcm.nl
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amaldev.blog
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| | | | | I was recently doing some background reading for a project and came across a cool concept called Gyrators. Sometimes also called synthetic inductors, they are circuit elements that emulate the behaviour of inductors using active components like opamps or transistors along with capacitors and resistors. The concept behind a gyrator is that it converts impedance, [...] | |
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limitedresults.com
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| | | TrustZone is the last hardware security mechanism integrated to ARMv8-M. This article presents some Fault Injection results achieved on Nuvoton M2351 | ||
