*Summary* Here is a summary of the video transcript "Custom ATmega32u4 microcontroller board - 2024 version" with timestamps: *Board Revisions:* * *[**0:46**]* The board is now narrower and fits in a standard breadboard. * *[**1:20**]* It uses a USB-C connector instead of micro-USB. * *[**1:10**]* The traces are thinner and curved for a cleaner look. * *[**1:40**]* Pin labels are printed directly on the PCB. * *[**1:56**]* A smaller, more aesthetically pleasing push button is used. * *[**2:01**]* The power supply section is revised with a different capacitor and fuse. * *[**2:17**]* The creator's signature is moved and the copper is revealed for a silver plating effect. * *[**2:38**]* Pin names are included on both sides of the board. *Assembly and Programming:* * *[**5:36**]* The board is assembled using a reflow process. * *[**6:22**]* The USB connectivity is tested before programming. * *[**7:16**]* An Arduino Nano is used as an ISP programmer to burn the bootloader onto the ATmega32u4 chip. * *[**8:50**]* Once the bootloader is installed, the board can be programmed directly via USB using the Arduino IDE. * *[**9:00**]* A basic program is uploaded to test the microcontroller and USB communication. *Other:* * *[**0:08**]* The video is sponsored by PCBWay, a PCB manufacturing service. * *[**9:57**]* The creator plans to sell the board as a product in the future. * *[**10:10**]* Support is available on Patreon. I used Google Gemini 1.5 Pro to summarize the transcript.
If you already own an Atmel ISP programmer such as the AVR-ISP2, Atmel-ICE, or a PicKit4, (all of which are supported by Arduino), then you can use those instead of another Arduino to program the boot loader. Other possible programmers include the older AVR Dragon, and Adafruits ISP mini.
