![]() ![]() ![]() Next time I am going to order special stencil together with the board for easy application. It worked quite well for me although I’ve put too much of soldering paste and had to remove excess with the iron. The flux and solder will melt and put everything in place. Technology is simply - put some mechanical solder paste on the board, place components and heat them with the hot air. With this project for the first time, I have tried a hot air gun. The minimal batch of 5 boards is more than enough for this project. The PCBs were ordered at JLCPCB and arrived in about two weeks after ordering. And since I already have a bunch of regular 12MHz quartz oscillators I used one of them instead of buying SMD one. I did not need to make it as small as possible, so the components are distributed very sparsely. The only addition to standard schematics from the datasheet is two BC847 transistors for automatic programming.Ĭomponents are soldered on a dual-layer PCB. The device is built around cheap and popular CH340G chip. And, of course, I wanted to have some fun. Most of the USB to Serial converters simply do not have this circuitry on board. My only reason to make it is to have cool addition allowing ESP8266s to be programmed automatically without “flash”/”reset” buttons but simple circuit with two transistors. Is there any reason to make it when there are a lot of cheap USB-Serial converters in the market? I don’t think so. Slightly tired of big and long-running projects both at work and at home I decided to make a small spin-off project to help me working with ESP8266/ESP32 devices. ![]() You can read about it following the link Updated version of CH340G based ESP programmer. I have updated the device with the USB Type C connector and more popular pinout for the header. Buy the CH340G programmer for ESP8266/ESP32 online ![]()
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