MUFF01 the first Satellite Prototype, costs less than 5€, weights less than 19.9 grams..
MUFF01 is going to fly piggybacked on Airbox Solar One.
Technically is complicated to be a real satellite because transmits at 25mW at 433.85 Mhz.
To receive a transmission using this low power added the 200 or 300 km to the nearest station in a very busy frequency it would be an utopia.
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An ATtiny of Atmel running at 1 Mhz is our controller. Using a square wave of 800 Hz and a 100 ms dot sending a CW message.
The sound sended is a 800Hz robotic CW due to the square wave instead of a sinus wave but Attiny can not use the tone() function of Arduino and we use a DIY simple function: maintaining 625 Microseconds High and 625 Microseconds Low a digital pin.
The coolest 433 mhz TX for beginers in arduino World. This is an old version now upgraded by other cheaper and lighter IC. We use this classic to send the message written below.
The signal is easily readable in AM
Recycling old twisted pair we have preapared a dipole antenna.
"CQ CQ DE MUFF01 TEST, SI RX SND QRG Y LOC A INFO@AIRBOX.SPACE, TNX 73, AR"
That means "General call, General Call Testing MUFF01, if received send UTC hour and Antenna location at info@airbox.space, thank you and best regards, message end"
Just a UHF Yagi antenna with SDR or UHF receiver and FLdigi or similar Software to read CW.
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