A crude frequency generator with Arduino, AD9851 dac and tm1638 display.
Cable connections details are in schetch.
Require libraries
https://github.com/k3ng/k3ng_analog_devices_dds
https://github.com/rjbatista/tm1638-library
Push buttons to increment digit frequency.
Start frequency generation quickly pressing button 1 and 8 simultaneously.
When the output is enabled you cannot change frequency!
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