Sorry about the flash reflection. The other Corona receivers of the same vintage probably also have the same chip and programming port - but that's the only Corona receiver I still own (or at least the only one I can find
![Laughing :lol:](./images/smilies/icon_lol.gif)
Interesting that the receiver has an AtMega88V chip - so twice the RAM that the transmitter has. I don't think it needs more - it may just be that 88 chips were cheaper or more available than 48s at the time my receiver was built.
These Corona modules and receivers are pretty much perfect for experimenting with FrSky protocols, also Futaba SFHSS, plus our own home-grown protocols if anyone wants to invent one! If we designed PCBs for CC2500-based transmitter modules and receivers, I can't think of any improvements, short of upgrading the AtMega48 / 88 to a 328.
![Smile :)](./images/smilies/icon_e_smile.gif)
... and I think the 328 chip has the same pinout as the 48 - so if I had a few more modules / receivers to play with, I could risk doing some chip transplants.
If anyone has any old Corona gear they don't use any more, they can send it to me! Right now I've only done the V8 transmitter modification so if you flash your transmitter module with that, your Corona receivers will be (at least for the time being) useless.
For the moment, I could provide a free upgrade of Corona transmitter modules to FrSky V8 for anyone interested but who doesn't have the tools and/or inclination to tackle flashing their own module. And I could accept donations in the form of old Corona receivers!
The transmitter modules I know work are the CT8F and CT8J - but if anyone has any different modules they could take a look inside, or send them to me - they may also have AtMega and CC2500 chips.