UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Arduino based DDS with 898 Eddystone dial

FRANK.C · 2nd May 2019, 9:56 am

I think a stepper motor to drive the dial is the way to go.

I am not familiar with Arduino but using a PIC microcontroller, it is possible to automatically save multiple values to the EEPROM when the power is removed(switch off or power cut etc.)
I found that a reservoir capacitor of around 2200 uF gives enough time after power is removed to do this..
This could be used to store the last position of the dial so its position is known the next time the radio is switched on.

Frank

2nd May 2019, 9:56 am	#5
FRANK.C Heptode Join Date: Feb 2006 Location: Roscommon, Ireland Posts: 732	Re: Arduino based DDS with 898 Eddystone dial I think a stepper motor to drive the dial is the way to go. I am not familiar with Arduino but using a PIC microcontroller, it is possible to automatically save multiple values to the EEPROM when the power is removed(switch off or power cut etc.) I found that a reservoir capacitor of around 2200 uF gives enough time after power is removed to do this.. This could be used to store the last position of the dial so its position is known the next time the radio is switched on. Frank __________________ www.electronics.frankcuffe.ovh