I received several requests to make a version of the
adapter board which converts the signal from the trainer port of Futaba radios to the Spektrum DSM2 module to work with the Futaba "Z" transmitters. These are the 12Z, 14MZ and 18MZ and 18SZ.
The issue with the "non-Z" adapter board and the Futaba 12Z, 14MZ, 18MZ or 18SZ is that the adapter board takes power from the trainer port and sends it to the module. The module has a built-in voltage regulator for 3.3V which in order to work properly needs at least 5.0-5.2V. The trainer port of the "Z" transmitters does not provide battery voltage so an external battery power source is needed.
The "Z" adapter board has a separate servo type connector (Futaba style) used to connect an external battery which powers the module. This battery can be a 2S LiPo or LiFe or even a 5- to 8-cell NiCd or NiMH. The adapter board provides protection from battery reverse polarity.
Testing with a 2S LiFe pack:
I also tested the adapter board and module with a 5-cell NiMH pack and it worked without an issue.
This adapter board works also with all other Futaba transmitters with the micro (square) trainer port like the 4YF, 4YBF, 6EX, 6J, 7C, 8FG, 8J, 9C, 10C, 12FG and 14SG but it still requires the use of the external battery as a power source because it is not connected to the power output of the trainer port - the red wire between the trainer port connector and the adapter board is not
...Continue Reading