[]

https://www.sparkfun.com/products/11801 (Tiny AVR Programmer, $16)

https://github.com/SpenceKonde/ATTinyCore

[]

my previous project on ATtiny45 (Mu Puzzle & BF interpreter)

http://wiki.yak.net/1039/mu004.ino.14.right-bananas

NOTES from the web

https://blog.podkalicki.com/how-to-compile-and-burn-the-code-to-avr-chip-on-linuxmacosxwindows/ (Łukasz Podkalicki also answers questions there )

https://www.fischl.de/usbasp/ (Thomas Fischl -- USBasp - USB programmer for Atmel AVR controllers )

http://download.savannah.gnu.org/releases/avrdude/

http://www.nongnu.org/avr-libc/ ( AVR Libc Home Page -- AVR Libc is a Free Software project whose goal is to provide a high quality C library for use with GCC on Atmel AVR microcontrollers.)

avr-libc-user-manual-2.0.0.pdf

http://www.nongnu.org/avr-libc/user-manual/FAQ.html

https://blog.podkalicki.com/attiny13-tone-generator/

https://blog.podkalicki.com/twiddle-factor-based-fft-for-microcontrollers/

https://drive.google.com/file/d/1MTGdW4_ZHMaIDW7nqQ_V67ZJxyJTDc1U/view ( https://blog.podkalicki.com/attiny13-assembler-avra-tutorial/ )

https://blog.podkalicki.com/100-projects-on-attiny13/

http://www.technoblogy.com/show?11TQ ( Digital Music Box [Updated] )

https://blog.adafruit.com/2017/03/15/attiny85-real-time-audio-pitch-shifter/ -- http://www.technoblogy.com/show?1L02 (Audio Pitch Shifter)

https://hackaday.com/2016/11/24/tiny-tunes-on-an-attiny13/

https://github.com/search?q=attiny+audio

https://github.com/mplewis/arduino_simpleSeq

https://github.com/mplewis/attiny_slaveSynth

https://github.com/viking/attiny85-player

https://github.com/electronut/attiny84-led-chaser/blob/master/main.c

https://github.com/petmar0/ATTinyRecorder/blob/master/apc_18_arduino_DigitalAudioRecorder-2/libraries/SdFat/

https://github.com/ntsakonas/avr-wspr-beacon

[]

https://github.com/thegaragelab/tinytemplate ( https://github.com/thegaragelab/tinytemplate/tree/master/firmware/shared )

https://marcelmg.github.io/software_uart/ ( https://github.com/MarcelMG/AVR8_BitBang_UART_TX )

https://www.instructables.com/id/Easy-ATTiny-Serial-Communication-with-Tiny-AVR-Pro/ ( "We'll find out that analog input 2 is a bit tricky on the ATTiny" -- https://github.com/quitmeyer/ATtinyBareDemos/blob/master/ATTinyAnalogInputTOSerial/ATTinyAnalogInputTOSerial.ino )

https://www.arduino.cc/reference/en/#functions

[]

Tiny_Programmer_v13.pdf

gabotronics-oscilloscope-xscopes-manual.pdf