![I wanted to make my own USB to ttl converter for a nextion display for simhub but I don't understand the difference between the 2 schematics, they use the same chips but I wanted to make my own USB to ttl converter for a nextion display for simhub but I don't understand the difference between the 2 schematics, they use the same chips but](https://preview.redd.it/5vrirmwgumi71.png?width=640&crop=smart&auto=webp&s=be6dca795070391387b1b1f79ee140511bc7114f)
I wanted to make my own USB to ttl converter for a nextion display for simhub but I don't understand the difference between the 2 schematics, they use the same chips but
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microcontroller - Is it possible to program a AT89S51 chip with a USB to TTL (UART) converter cable or Arduino? - Electrical Engineering Stack Exchange
![arduino - Problems with homemade RS232-to-TTL converter board based on TI's MAX232 - Electrical Engineering Stack Exchange arduino - Problems with homemade RS232-to-TTL converter board based on TI's MAX232 - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/5JRqK.png)
arduino - Problems with homemade RS232-to-TTL converter board based on TI's MAX232 - Electrical Engineering Stack Exchange
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