Introduction: FTDI Converter 3.3V Power Hack
Main issue for programming ESP8266 boards is good and reliable power of 3.3V. I decided to make compact device consist from FTDI convertor with CP2104 chip and DC-DC buck convertor
Step 1: Obtain Devices
There are lots of sources for those devices. I bought it on ebay , here is two example links
Step 2: Modification FTDI Convertor
One of output pin (second from bottom) is 3.3V voltage. But this power is very weak, and output current is small. So, you have to interrupt line (trace) from CP2014 chip to 3.3V output pin.
Step 3: Solder Wires to DC-DC Convertor
Use "standard" red and black wires and solder to DC-DC convertor. Use double side foam tape and glue convertor to back side od FTDI convertor
Step 4: Solder Wires From DC-DC Convertor to FTDI
Use soldering station to solder black and red wires. Input side of DC-DC convertor is powered from USB socket (left side on photo) and output from DC-DC convertor is soldered to GND and 3.3V pins (right side on photo)
Step 5: Final Step
Use any USB "power source" like USB port in computer, or mobile phone charger to power FTDI convertor. On DC-DC convertor using small Philips screwdriver to set output voltage to 3.3V. Then apply small drop of nail polish to potentiometer to avoid change of output voltage.
Participated in the
Power Supply Contest
5 years ago
Thanks for sharing :)