All Questions
13
questions
0
votes
0
answers
109
views
Ethernet to UART (or RS232) conversion
For the PCB I'm designing, I need serial communication (1.8V UART, 3.3V UART, 5V UART or RS232, whichever is easiest) from an Ethernet connection (the devices connected to the Ethernet network will ...
- 7,697
-1
votes
3
answers
669
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
vote
2
answers
2k
views
Help with a RS232 (+-12 Volts) to USB converter [closed]
I have a device I want to communicate to with the following signals:
This is a programmable power supply, an IPS-405. I have determined from the image above, which is all that is available in the ...
- 13
5
votes
2
answers
763
views
Purpose of this oscillator (74HCT14-based) on RS-232 to RS-485 converter?
I am reverse engineering an RS-232 to RS-485 converter to understand how it works. I have attached the schematic that I reverse-engineered from the PCB (apologies for the hand-drawn schematic). I've ...
- 177
0
votes
2
answers
267
views
RS232 Bridge cable stopping after some time
Im trying to reverse engineer a very old DOS program that connects with a machine using RS232, for this i setup a typical in the middle connection like this:
From Computer A to PC A connection im ...
- 101
0
votes
1
answer
1k
views
Use RS232 - RS422 Converter with Encoder
Problem
I am trying to communicate an incremental encoder (TTL/422) with a PC, however, the PC is modern (correct me if I am wrong, It is a Sabertooth Z77) and doesn't have parallel ports...
I found a ...
- 105
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
0
votes
2
answers
2k
views
Has anyone built an rs232 to usb converter?
I want to implement serial communication into one of my projects, but I'm hesitant to use a serial cable due them them being exceedingly hard to find nowadays. I found an old converter and took it ...
- 1
2
votes
0
answers
903
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
1
vote
3
answers
1k
views
Simple RS232 to 8 bit Parallel circuit
I want to make a simple rs232 to parallel (8 bit) converter.
I would like the input to 1 wire and the output can just be 8 bit with no strobes etc. and run at high speeds (ideally up to 1Mbps, put ~...
- 115
2
votes
2
answers
3k
views
How can I know whether a random "known not TTL" RS232 device will work with any old random USB-RS232 converter?
I've been hunting around for RS232 converters for a little while now, trying to get my head around the way RS232 works (or at least how it's supposed to), and the way RS232-USB converters (more ...
- 227
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
6
votes
4
answers
4k
views
Recommendation of a USB-to-RS-232 chip for an industrial environment
I have bought a device which has an ATmega microcontroller and an FTDI chip which connects to a computer through USB. The FTDI is used only as an RS-232-to-USB adapter.
My problem is that this device ...
- 247