Is anyone familiar with the ARD-FTDI FTDI Serial Adapter 5V / 3.3V?
I bought it for programming arduino mini pro 3.3 and esp8266.
The trouble is that with the switch on 3.3, the Vcc still outputs 5V.
I guess I can use a converter to get it down to 3.3.
But the Rx and TX pins are showing 3.4-3.5V. Is that too high?