PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/ This PCB provides an I2C interface to control 555 timer frequency and the ability to switch multiple audio channels on and off to create simple or complex tones, melodies, or sound effects. Arduino Uno is used as the I2C controller in this project. This PCB can be ordered from PCBWay (I will receive a small commission): https://www.pcbway.com/project/shareproject/555_Sound_Generator_I2C_Controlled.html Sketch & Schematic https://github.com/GadgetReboot/GR_555_Controller Atari Punk Console / Stepped Tone Generator https://en.wikipedia.org/wiki/Atari_Punk_Console https://www.jameco.com/Jameco/workshop/diy/atari-punk-console.html Datasheets https://www.renesas.com/us/en/www/doc/datasheet/x9c102-103-104-503.pdf https://www.renesas.com/br/zh/www/doc/datasheet/icm7555-56.pdf http://www.ti.com/lit/ds/symlink/cd4066b.pdf?ts=1590842832904 http://www.ti.com/lit/ds/symlink/pcf8574.pdf?ts=1590843096845 Patreon: https://www.patreon.com/gadgetreboot Pinterest: https://www.pinterest.ca/GadgetReboot Twitter: @GadgetReboot https://twitter.com/gadgetreboot ... https://www.youtube.com/watch?v=oFtGOOA25tA

PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/ This is an ATTiny 14 pin 0-Series or 1-Series breakout pcb with on-board MCP23017 GPIO expander, I2C OLED display header, and a UPDI header for connecting to a programmer. This can be used as a basic controller with support for I2C, SPI, UART, or normal ATTiny GPIO plus 16 extra GPIO pins. Sketch/schematic: https://github.com/GadgetReboot/ATTiny_GPIO_Controller PCBs at PCBWay.com: https://www.pcbway.com/project/shareproject/ATTiny_GPIO_Expander_0_Series_1_Series_MCP23017_265babd7.html UPDI Programming with an Uno: https://www.youtube.com/watch?v=YOGeoW_QySs More on the MCP23017: https://www.youtube.com/watch?v=74DgM2nAeLo Arduino megaTinyCore board file for ATTiny support: https://github.com/SpenceKonde/megaTinyCore ATTiny OLED examples from Technoblogy: http://www.technoblogy.com/show?2CFT If you'd like to support the channel, you can: Support me on Patreon: https://www.patreon.com/gadgetreboot Become a channel member (click the Join button): https://www.youtube.com/c/GadgetReboot Shop through my affiliate links (I may earn a small commission, costs you nothing)! Banggood https://www.banggood.com/custlink/3vKYLANH8N Aliexpress https://s.click.aliexpress.com/e/_AFeHwB Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325 Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641 Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4 #ElectronicsCreators ... https://www.youtube.com/watch?v=AOHLdVXjqYk