CH340G Serial adapter - 0.5A PTC fuse, all pins broken out, and the "FTDI pinout" used on the Pro Mini and my ATtiny breakout boardsDesigned by Azzy's Electronics, Ships from United States of America
The CH340G is an inexpensive USB serial adapter chip - similar to the better known FTDI FT232 chip. Programming an Arduino Pro Mini, a breadboard Arduino, or one of my ATtiny boards requires a USB ...Read More…
The CH340G is an inexpensive USB serial adapter chip - similar to the better known FTDI FT232 chip. Programming an Arduino Pro Mini, a breadboard Arduino, or one of my ATtiny boards requires a USB serial adapter with a 6-pin header with GND, Vcc, Tx, Rx, and DTR. This has traditionally taken the form of an "FTDI" adapter using the FT232 chip, however, not only are these parts more expensive, but they are frequently counterfeited, and the counterfeit chips do not work with the new drivers (Google "ftdigate" for the full story). The CH340G serial adapters are reliable and are not known to have a counterfeiting problem.
This CH340G-based adapter not only has the usual "FTDI" 6-pin pinout, it also breaks out the five other "modem control" pins - RTS, CTS, DCD, RI, and DSR. RTS is an output, the other four are inputs (gently pulled up, active low). Full featured terminal software, such as hTerm (free) allows the state of these pins to be viewed on the screen, and the RTS and DTR pins to be asserted and deasserted by clicking the corresponding buttons. When connected to a typical Arduino board, twiddling DTR will reset the board - RTS is unused. This functionality can be a great help in debugging.
In the 6-pin "FTDI"-style pinout, the second pin, normally CTS, is left open, as most Arduino boards that use that header simply tie that pin to ground, which would render CTS useless.
This board is sold ASSEMBLED as shown, WITHOUT pin header.
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I build projects with Arduino (ATtinies almost exclusively, never anything bigger than a '328p) and Espruino (often both working together), and I make a lot of circuit boards for these projects. Particularly after using my ATtiny-prototyping board for my own projects, I realized that these would be useful to other people, and decided to start selling them here on Tindie.
Strip Board, Protoboard, prototyping board, solderable breadboard - whatever you want to call it - it has been a mainstay in electronics prototyping for decades, and hasn't changed much in the interim (not even in production quality, as they're still often single-sided and/or manufactured from low-grade phenolic resin instead of FR4). My prototyping board creations bring these into the modern era, offering a combination of 0.1" through-hole prototyping areas (consisting of groups of 2, 3 or 4 pins connected together, like solderable breadboard) and pads for common surface mount packages connected to through-holes for easy soldering. To handle projects of all sizes, I offer prototyping board as large as 4" x 4", down to less than an inch square in my Mini Protoboard line. Unlike most commercial prototyping board, these boards are made to the same quality standards as real PCBs. Through-holes are plated, and the boards are double sided. These are offered in both generic versions, and ones tailored to specific microcontrollers, like the Tiny84/85, or microcontroller boards, like the Espruino Pico, Arduino Pro Mini, and the wildly popular ESP8266.
ATtiny breakout boards:
I love the ATtiny lineup, particularly some of the less popular ones, like the incredibly full-featured ATtiny841, ATtiny1634, and ATtiny828. Breakout boards for these that had the features I wanted were not readily available - so I made my own. I've since expanded my product line to include breakout boards for the ATtiny861, ATtiny167, and ATtiny88 - and all of these are available both as bare boards and assembled. In addition to designing the hardware I also maintain [ATtinyCore Universal](https://github.com/SpenceKonde/ATTinyCore), which enables Arduino support for all these ATtiny's and more.
I also sell a number of other boards to fill what I felt were gaps in the market, including a breakout board for the popular LoRa/LoRaWAN modules from Microchip (the RN2483 and 2903), which has become one of my top selling items. I also sell MOSFET drivers and breakout boards for logic level MOSFETs operating at logic levels of 2.5v and lower - while a great number of MOSFETs are available that operate with very low gate voltages, these are almost invariably SMD parts which are difficult to use without a properly designed breakout board.