Raspberry and SSTV project Introduction: In this project the Raspberry Pi with the PiCam is used as a wireless camera which can transmit images over long distances, usually tenths of kilometers. Images will be transmitted by amateur radio (ham-radio) using slow scan television (SSTV) on the 2 meter band (144.5 MHz). Since the Pi can…
DetailsEA3GCY ILER 40 / 4-5W QRP SSB Monoband Transceiver KIT. SPECIFICATIONS GENERAL: Frequency Coverage: VXO tuning 20 a 100KHz segment in 40M band (60-70KHz for better stability). Bandwidth range is selected according L6 value in the VXO circuit. Frequency Control: high stability VXO oscillator. Option A: two 12.031MHz. crystals (upper limit aprox. 7.105MHz) Opción B:…
DetailsThe Microcode kit assembles into a versatile Morse Code reader capable of decoding and displaying audio Morse code signals from speeds of 10 words per minute (wpm) to over 40wpm. A sensitive integral microphone combined with a tunable bandpass active filter allow the Microcode to operate effectively by being placed near to a receiver’s loudspeaker.…
DetailsTT2A works at 7.030 and 14.060. However, crystal sockets are used in the kit, offering a more flexible frequency switching. Crystals ranging from 60m – 20m can be plugged in to work without altering the tank coil. Photo by Youkits Photo by Youkits WORKING ON OTHER HF BANDS The frequency range for BAND 1 is…
DetailsThe original idea (as seen above) was to implement a complete SSB modulator and demodulator with software in a ATTINY45 micro-controller chip and a AD9834 as DDS. The software samples microphone signal with ADC and then derives the amplitude and phase of the audio signal. The amplitude and phase extraction is derived from the in-phase…
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