I'm trying to flash new firmware onto an ESP8266EX chip. The chip requires 3.3v and 80 mA (average).
My USB to TTL programmer (FTDI chipset) can supply 3.3v but only at 50 mA.
Here is what I'm thinking:
[USB-to-TTL] 3.3v -> not connected [USB-to-TTL] RX -> [ESP8266] TX [USB-to-TTL] TX -> [ESP8266] RX [Bench PSU] GND -> [USB-to-TTL] GND and [ESP8266] GND [Bench PSU] 3.3v -> [ESP8266] VCC
Therefore, the USB-to-TTL adapter is powered by USB, the ESP8266 is powered by the bench PSU, and all grounds are connected together. (NOTE: I know it's important to NOT use the earth ground on the PSU but instead use the floating ground/black terminal)
Does that sound correct?