Breakout for TQFP-32 AVR chips: ATtiny88/48, ATtiny828 (28 ADC pins!)Designed by Azduino by Spence Konde in United States of America
Assembled Version for ATTiny88/828 here These are breakout boards compatible with the ATtiny88/48, and the ATtiny828. For the 828, which has a hardware serial port, an FTDI header is provided, and ...Read More…
These are breakout boards compatible with the ATtiny88/48, and the ATtiny828. For the 828, which has a hardware serial port, an FTDI header is provided, and pads are provided for the DTR-reset trick used to enter the bootloader automatically. The board is available in two versions, for the 828, and for the 48/88. Board size is 2" x 1.65"
The ATtiny 828 is notable for having hardware serial, 28 GPIO pins... and analog input on every pin (though with a conspicuously basic ADC - I'd wager money that it was planned to have a differential ADC, probably the same one the ATtiny841 got - but something went terribly wrong - likely management lost patience with a troubled design process and ordered revisions to stop). Still, it's useful for reading large numbers of analog voltages and outputting the results to serial. The ATTiny828 is supported by my ATTinyCore, complete with Optiboot bootloader: Github repo
The ATtiny 88, on the other hand, is notable mainly for it's incredibly low price coupled with 28 GPIO pins. The feature set, understandably, is rather sparse - no hardware serial, 2 timers, only one of which has PWM, and no support for external crystal. It is supported by my ATTinyCore: Github repo The 6-pin FTDI header connects the data lines to AIN0 and AIN1, which is used for by the ATTinyCore builtin software serial as well as the optiboot software serial.
1x 1206 1uf capacitor or as recommended by regulator mfg on input
Tiny x8, tiny 828, and mega x8PB requires 2 0.1uf caps (decoupling). The mega x8 requires three. If autoreset is used, another 0.1uf cap is needed for that.
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