• Connecting ARM controller to TTL logic levels
    I have an LPC2119 controller. The GPIO pins operate on 0-3.3V levels. I wish to interface this to an LCD controller which operates on 0 to 5V (the minimum input value recognised as high is 3.5V), therefore...
  • Difference between Serial and TTL communication
    Hi, I am trying to send data from one controller to another directly ie without converting it into serial. Now when i send the data using 232 it is being received alright and the out put is also displayed...
  • 3.3V supply for ttl/rs232
    Hi, I find a problem when I wanted to run a ATMEGA32 with VCC supply of 3.3V, everything is okay except USART. I see that if supply voltage is 5V then USART works well. With the same ttl/rs232 module...
  • Chat Long Distance With STM32S, Use the UART port to connect to a walky talky
    Please tell me if that is a great idea or a really great idea. Anyway, the theory is that you can connect 2 STM32S to walky-talkies, and then transmit data readable only by a touchscreen, over a...
  • TTL TO RS 232
    HI, I am super confused why we need to use ttl to rs 232 conversion and rs232 to ttl conversion. please help...