To program the Attiny85 microcontroller, you will need a hardware programmer such as USBasp or USBtinyISP. You can use software like Arduino IDE with the AttinyCore plugin to write and upload code to the Attiny85. Make sure to select the correct board and programmer in the Arduino IDE settings before uploading your code. Additionally, you may need to set the fuses on the Attiny85 to configure its clock source and other settings. **

The Attiny85 can be controlled via USB by using a USB to serial converter, such as the FTDI FT232, to establish a serial communication link between the Attiny85 and a computer. The Attiny85 can be programmed to listen for commands over the serial connection and respond accordingly. This allows for the computer to send data and instructions to the Attiny85, enabling control and interaction with the microcontroller. Additionally, software such as Arduino IDE can be used to write and upload code to the Attiny85, allowing for easy control and customization of its functionality. **

One can control the Attiny85 via USB by using a USB to serial converter module, such as the CP2102 or FTDI FT232. These modules allow the Attiny85 to communicate with a computer through a USB connection. By programming the Attiny85 to listen for commands over the serial connection, one can send instructions from a computer to control the Attiny85's functions and behavior. This enables remote control and monitoring of the Attiny85's operations without the need for physical interaction. **

To integrate the Attiny85 Digispark into the Digikeyboard, you will need to modify the firmware of the Digikeyboard to support the Attiny85 microcontroller. This may involve writing custom code to handle the communication protocol and input/output functions of the Attiny85. Additionally, you may need to physically modify the Digikeyboard to accommodate the Attiny85, such as adding the necessary connections and components. Once the firmware and hardware modifications are complete, you can then program the Attiny85 with the modified firmware and integrate it into the Digikeyboard. **

To program the ATtiny85 via I2C with an LCD display, you will need to use a programmer such as the Arduino Uno. First, upload the I2C communication code to the ATtiny85 using the Arduino Uno as a programmer. Then, connect the ATtiny85 to the LCD display using the I2C protocol. Finally, write your program to send data to the LCD display through the I2C communication. Make sure to set the correct I2C address for the LCD display in your code. **

While the Attiny85 and Arduino Uno are both microcontrollers, they have some differences in terms of programming. The Attiny85 can be programmed using the Arduino IDE, but it requires some additional steps and modifications to the IDE settings. The Attiny85 has fewer pins and less memory compared to the Arduino Uno, so some features and libraries may not be directly compatible. However, with the appropriate modifications and libraries, it is possible to program an Attiny85 in a similar way to an Arduino Uno. **

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