All Questions
12
questions
-1
votes
3
answers
665
views
Which MAX3232 IC's for simple UART to RS232 converter?
I am trying make a TTL to RS232 converter.
I have designed my PCB for 16 pin SMD sop16 and max3232 CSE+. But when I was buying from a store (store link), I saw other types of max3232. I've bought and ...
- 1,139
-1
votes
1
answer
178
views
Are TTL to USB converters bi-directional? [closed]
I'm trying to convert 5V TTL signals into USB signals that a PC can read. However, most converters that I'm able to find are defined as USB-TTL converters. Can I convert TTL signals to USB signals ...
- 19
0
votes
1
answer
818
views
Difference between MAX3430 and ADM483 for TTL-RS485 Converter
I want to use TTL-RS485 Circuit as in the attachment. The circuit is working when I use ADM483 Transceiver for U1. It can provide communication. However the circuit is not working when I use MAX3430 ...
- 99
7
votes
2
answers
15k
views
What is Namur, and how does it work?
I found a TTL converter box custom made many years ago. It says Namur_to_TTL converter on it. What is Namur? I googled but couldn't find a clear explanation.
- 1,779
0
votes
1
answer
2k
views
rs232-ttl converter problem
I bought this RS232-TTL converter
https://www.digikey.com/product-detail/en/seeed-technology-co-ltd/101990008/1597-1306-ND/5487765
and I'm using this along with an Arduino Mega 2560
I'm feeding the ...
- 11
1
vote
0
answers
371
views
CP2108 with level converter txb0108 - UART communication TTL and LVTTL
My project uses four different modems (one 3v3 LVTTL(?) and three 5v TTL) for AT communication.
Each modem has a UART interface (TTL compatible).
For my application, i chose the CP2108 to ...
- 11
2
votes
2
answers
3k
views
USB to TTL converter: why doesn't TX need a voltage selector?
I plan to flash new firmware for a Sonoff ESP8266-based switch.
So I need a 3.3v USB to TTL for the programming. I see an inexpensive converter from China which has pinouts for
3.3v
TX
RX
GND
5v
...
- 257
2
votes
0
answers
901
views
RS232 to TTL converter problem
I have a RS232 to TTL Converter which has 4 pins Vcc, Tx, Rx, GND . I am trying to make a serial communication with my PC. I have a AVR development board and I have tested my program by connecting ...
- 1,666
2
votes
2
answers
705
views
2.8V UART to 5V MCU - how?
I'm trying to connect ZTE MG2639 to 5V AVR (or USB<->RS232). This module is using 2.8V at IO. How can I do that? Normal voltage divider?
And how to check if communication is OK in Putty? Just type ...
- 177
1
vote
3
answers
17k
views
Converting serial signal (12V-5V) and reading it using Arduino
I'm trying to read some commands from a device that uses non-standard voltage levels for serial communication. It uses 0V for 0 and 12V for 1. For all I know, TTL levels are 0-5V, so if I want to ...
- 215
4
votes
1
answer
2k
views
Need help with a sub-standard RS232
I've built a UART-RS232 converter based on max232 and it works well... but not for what I need :)
According to Maxim's datasheet the RS232 side signal voltage should be theoretically +/-10v (5v * 2), ...
- 171
2
votes
3
answers
4k
views
Will a 3V3 rated UART be damaged by applying 5V signals?
If I have a device specified for 3.3V operation and I connect a 5V level TTL signal to it ? Will it's UART ports be damaged or not ?
I have a WiFi module and I want to know if its UART ports will ...
