Uploaded February 2011 | Updated September 2026, 4 hours ago
This morning I quickly put together a little RC filter to turn the PWM output of the Arduino into smoothly varying analog voltage to control the VCO in my G0UPL low power beacon transmitter. I think the filter is actually a bit too aggressive, it takes a significant fraction of a second to settle on the new value. I'll get a different cap in there later to speed that up a bit. (Apologies for the soft focus, I'll remember to use the macro next time).
This morning I quickly put together a little RC filter to turn the PWM output of the Arduino into smoothly varying analog voltage to control the VCO in my G0UPL low power beacon transmitter. I think the filter is actually a bit too aggressive, it takes a significant fraction of a second to settle on the new value. I'll get a different cap in there later to speed that up a bit. (Apologies for the soft focus, I'll remember to use the macro next time).
