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This is a simple development board for the Atmel ATtiny861 or ATtiny167. It provides an ISP header for programming via ISP as well as decoupling capacitors, a voltage regulator, and a PTC fuse prot...Read More…
This is a simple development board for the Atmel ATtiny861 or ATtiny167. It provides an ISP header for programming via ISP as well as decoupling capacitors, a voltage regulator, and a PTC fuse protecting the external power supply from a short. The ATtiny167 is supplied with Optiboot preloaded, allowing it to be programmed over serial (like an Arduino Pro Mini). It can be used as a standalone board with female dupont jumpers or header, and the pins pointing up, or with breadboard, by mounting the pins pointing down. For ease of connection w/out breadboard, four Vcc and Gnd pins are provided, instead of just one. Because these chips are less popular, and have a similar pinout, they use the same PCB; a separate header is provided for programming the 167 or 861.
Boards for the ATtiny 861 are sold in two versions, 3.3v and 5v. These are pre-configured to use the internal 8mhz oscillator, and internal 16mhz PLL clock, respectively - though this can be changed normally. Optionally, a crystal can be installed prior to shipping, or one can be installed by the customer if a different speed, or higher accuracy, is required. Boards for the ATtiny 167 are sold in three versions, 3.3v (internal 8mhz), 3.3 (external 8mhz), and 5v (external 16mhz).
Using the ATTinyCore Universal core available from my Github at https://github.com/SpenceKonde/ATTinyCore the ATtiny861 and ATtiny167 can be used with the Arduino IDE. The ATtiny167 can be programmed over serial (like an Arduino Pro Mini), and both can be programmed with any ISP programmer (USBAsp recommended).
This board is sold ASSEMBLED, but without pins (as shown), with fuses set to use the selected clock source.
The ATtiny861 is essentially a more advanced version of the ATtiny85. Like it's smaller cousin, it can be clocked off an internal PLL clock generated from the internal oscillator, allowing a 16mhz operating frequency without an external crystal. The PLL clock can also be used as the clock source for Timer1, allowing it to run at up to 64MHz, with the same prescaler as used in the x5 series, allowing for PWM and squarewave output over a very wide range of frequencies. The big difference between the x61 and x5 series is the number of pins, and the special features of the x61 series for driving BLDC motors with 3 pairs of complementary PWM waveforms.
The ATtiny167 is the automotive entry in the ATtiny product line, with it's headline feature being it's hardware support for LIN 2.1/1.3, and the acompanying current source for LIN node identification. LIN is a broadcast serial network protocol designed for automotive applications, and in widespread use since the early 2000's. The same technology can also be used for general purpose communication between microcontrollers that support it.
A CH340G-based serial adapter is available as an option. This will be supplied with a 6-pin cable as shown. These are mass production adapters, however they are a cut above the most common units, and have a switch to select 3.3v or 5v operation. They break out the pins necessary for programming one of these breakout boards, or an Arduino Pro Mini or similar - Vcc, Gnd, TX, RX, DTR and CTS.
Note that the ATtiny861 does not have hardware serial support, and no bootloader for that is supplied - it must be programmed using an ISP programmer.
For a fancier CH340G adapter which breaks out all pins, check out my own CH340G-based design.
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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.