All Questions
Tagged with ttl microcontroller
25
questions
-3
votes
1
answer
131
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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
2
answers
564
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How do I know if it's RS232 levels or TTL levels
I have a random device: GT MEDIA V8 Finder Pro. I would like to communicate over its console port.
Here are some pictures of its mainboard. Here is the area around the console connector:
I have no ...
0
votes
0
answers
282
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ESP32-C3-WROOM: error flashing chip
I am developing an ESP32-C3-WROOM custom board, but when I tried to flash the chip using UART (FT232D USB-TTL) and Arduino IDE, I got the message "A fatal error occurred: Failed to connect to ...
1
vote
1
answer
2k
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What are the output logic levels of this STM32?
I am struggling getting my head around the input and output logic levels, mostly the output levels of this STM32 (STM32F446xC/E).
This table shows the output logic levels as dependent on if it is a ...
- 161
0
votes
1
answer
255
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Is powering the Nuvoton N76E003 with just the UART0 pins legitimate?
I bought an 8 channel USB/UART controlled relay board from banggood.com:
https://www.banggood.com/2-in-1-DC-5V-8Channel-USB-Serial-Port-Relay-Module-UART-RS232-TTL-Switch-Board-CH340-for-Windows-Linux-...
user97497
1
vote
2
answers
1k
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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
2
votes
2
answers
1k
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Mux UART with 74xx Multiplexer
I have a legacy LPC MCU with 2 UARTs only. One of these UARTs is reserved for different functions such as IAP and RS232. So basically, I have one UART available only.
For an experimental project I ...
0
votes
1
answer
168
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Driving a ThorLabs piezo controller with TTL external input
I am trying to drive a ThorLabs piezo controller (https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2421&pn=KPZ101) with an external +3.3V TTL signal provided by a microcontroller (using ...
- 31
10
votes
4
answers
6k
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Buffering a Digital Microcontroller Signal for Connecting to an Optocoupler
I frequently work on projects in which I use optocouplers for isolating digital +5VDC control signals (for example, from a microcontroller) from the rest of the circuit. However, since these work by ...
- 747
3
votes
2
answers
11k
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Should I connect unused STM32 pins to ground?
I'm designing some circuit using STM32L152RBT6 microcontroller. I'm using STM32L-DISCOVERY scheme as a reference of good STM32 practices. I've noticed that free pins of programmer's MCU aren't ...
- 133
0
votes
1
answer
205
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Rs232 connection to gyro, uC and PC
I have a question regarding RS232 communication between a VectorNav VN-100 Gyro, Mbed LPC1968 uC and PC. I am using gyro to measure the number of rotation and processing it in the uC and displaying ...
0
votes
3
answers
2k
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220VAC to TTL converter
I'm building a circuit that sends TTL level signal to uP whether AC signal exists or not. The schematic is as follows:
Actually, the circuit almost works as I expect; however, there occurs some ...
- 105
0
votes
2
answers
1k
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High voltage to TTL conversion
I'm designing a circuit that is going to sense the existence of high voltage DC(400V+) via microcontroller. I've already designed it for AC voltage using an optocoupler; however, I will not able to ...
- 105
0
votes
2
answers
285
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Integrated TTL in SPDT-switch
Found a switch for a project, and want to make sure I understand it correctly.
This is the switch:
(Mini-Circuits SWMA-2-50DR+).
Now, it has a TTL driver circuit with the inputs +5V, -5V, and TTL IN....
- 167
2
votes
3
answers
591
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Logic design to circuit -- how is it generally done?
So I've designed this CPU with purely logical components (basic logic gates), now how would I go about converting it into a circuit? I know that logical gates can be implemented using transistors, but ...
- 123