Category: Source Code

“Gimme Five” reloaded – A compact 5 band QRP SSB transceiver in SMD technology: VFO, LO, MCU etc.

As mentioned in the introductory article to this radio the digital components in this transceiver are pre-manufactured modules that have only been put together in a more or less sensible way. ;-). These modules are: AD9850 as variable frequency oscillator (VFO), China made no-name board, Si5351 as local oscillator (LO) produced by “Adafruit”, Arduino Pro…

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Programming the AD9834 DDS chip

This is a software project for building a VFO with the 75MHz clocked AD9834 synthesizer chip by Analog Devices. Due to the Nyquyst theoreme with a maximum clock rate of 75 MHz a frequency of 37.5 MHz can be achieved. When overclocking the chip to 100 MHz (which has been succesfully tested in many cases)…

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