Ian KD8CEC has been busy again in conjuring up new features in his CEC firmware. He is tempting us with descriptions of two new features:
- Nextion display update that makes it easy to adjust keying speed and to select the keyer type (Iambic A, Iambic B or Straight Key) even while in TX
- Adding an additional arduino, connected to the Raduino via i2c, to provide an S-meter function.
The first feature is well explained by the photo above. The second feature is a bit more difficult to describe. By adding a US$3 additional arduino the µBITx now has double the number of analogue and digital ports and another 32K of program space. This could be a fun ride! The first function is a basic one, but an important one. A much more sensitive S-meter. But wait there’s more, as yet to be fully described. If you already have a Nextion screen, it looks like you may be in line for a half decent signal analyser function.
Connecting up the arduino
The circuit is pretty straight forward, and involves just a couple of resistors and a capacitor, along with wiring to +5v and ground, and the two i2c lines.