All Questions
39
questions
1
vote
2
answers
72
views
Designing a particular clock cycle series with glue logic/CMOS/TTL for serial data without a uP
I am looking to design an interface for serial data that runs for 31 cycles (not 32, I know), but with uneven cycles to transmit serial data. Each cycle is 8 clock pulses (at 7MHz). For the first 20 ...
0
votes
3
answers
44
views
Use digital sensor with USB to serial TTL converter?
I have a sensor (HC2A-S3A), which provides analog and digital output signals. The digital interface is UART (19200 baud, protocol RoASCII). Can I use a USB to Serial TTL Converter (chipset: FTDI ...
- 101
0
votes
1
answer
91
views
Prolific PL2303 knock-off USB-TTL adapter without timing crystal
I recently got this bare-bones USB-TTL adapter which unsurprisingly contains a knock-off Prolific chip but on top of that it is entirely without the crystal oscillator. It seems to be missing some ...
- 256
0
votes
2
answers
76
views
Tie an enable pin to ground when another pin is high
I am designing a simple circuit with two ICs. IC1 has an enable pin that is internally pulled up with a 10Kohm resistor. To disable IC1 you have to tie this pin to ground.
IC2 has an serial presence ...
- 103
1
vote
1
answer
109
views
How to double a single TTL to link to 2 independent TTL terminal
I am working on a project that needs multiple serial connection between mcu sensors .
In order to send data by ttl serial from 1 mcu to 2 other mcu and reverse...
What is the best way to achieve this ...
- 33
-3
votes
1
answer
131
views
Definitions of Serial TTL UART MCU acronyms
I was looking for a comprehensive list of terms and acronyms concerning serial peripheral communication including their descriptions and, crucially, how they relate to each other. Since this site ...
- 256
0
votes
1
answer
28
views
Serial conection HMT310
How to connect the HMT310 via serial port? When I connect it and open PuTTY and put "?" for it to show me the data, it pulls all "U"s. I already checked that the baudrate and other ...
- 21
0
votes
1
answer
328
views
Communicating with 6 TTL devices that support the Modbus protocol
I am working on project using Hukseflux SR05-D2A2 thermal sensors. These sensors support Modbus communication through a TTL interface. The objective is to read the value at a specific address in the ...
0
votes
0
answers
494
views
FT232RL Chip is not working (USB to TTL)
I used an FT232RL chip to make a USB to TTL converter using the schematic below.
Although I can send a message and the TX LED is lightining up, I cannot receive any messages.
Can anyone see a problem ...
- 19
0
votes
1
answer
320
views
How to connect RS232 level shifter?
I'm trying to use this:
https://www.sparkfun.com/products/449
to connect my RPi to my computer via a USB to serial device. (And eventually connect the RPi to other legacy serial devices)
My questions:
...
- 357
0
votes
1
answer
490
views
SN75176 with 3.3V
Can I connect the SN75176 RS485 transceiver with a 3.3V microcontroller? The datasheet says that it must be powered with 5V and all inputs / outputs are TTL, but I'm not sure since the minimum high ...
- 427
0
votes
1
answer
48
views
Is there an IC that works like the PL2303 for TTL TO USB? [closed]
Is there an IC that works like the PL2303 for TTL TO USB and can connect to android device with driver?
I have search a lot but I did not find such a thing.
2
votes
1
answer
1k
views
What kind of serial cable do I need? (TTL vs RS232)
So I have a headless NAS that I'm trying to connect to via a serial console so I can install a different OS. It has a 3.5mm jack on the back I/O labeled COM1.
I had ...
- 23
0
votes
0
answers
118
views
Chip shorting to ground when connecting the grounds
I have a pcb that converts USB to RS232, it is using a CH340G and a MAX2323. The output when not connected works as expected.
I try to connect it to a separate device that has its own power supply. ...
- 101
1
vote
2
answers
1k
views
Flashing program into microcontroller, usb-ttl, idea behind?
I have limited knowledge on this topic(MCUs, communication protocols, etc.). I back then worked with an STM32 MCU and did some UART(or USART, can't remember) communication between a PC and the MCU. ...
- 2,106