All Questions
Tagged with level-shifting microcontroller
39
questions
1
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2
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58
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Level shifting 7.5-15V range to 0-3.3V range to read on a microcontroller
I have a microcontroller that is meant to read a voltage between 7.5-15 V range. The ADC for the microcontroller is 3.3 V max so I came up with the circuit shown below. It takes in 7.5-15 V input and ...
- 11
0
votes
1
answer
36
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Issue controlling MOSFET with PCF8575
I'm currently trying to control an array of MOSFETS so I can drive several solenoids. I'm using the Boron from particle.io as my main board, the PCF8575 as my I/O expander, the MAX3004 as a level ...
- 1
0
votes
3
answers
86
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Level-shifter IC connected to microcontroller
I am trying to do a power assessment of a microcontroller (TMS320F28379D, datasheet link: https://www.ti.com/lit/ds/sprs880o/sprs880o.pdf?ts=1702312460730).
The output pins of the microcontroller is ...
0
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2
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81
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Current into level shifter IC from microcontroller
I am trying to do a power assessment of a microcontroller (TMS320F28379D, datasheet link: https://www.ti.com/lit/ds/sprs880o/sprs880o.pdf?ts=1702312460730)
From the below datasheet, is \$ 4mA \$ the ...
5
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6
answers
2k
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Switching line between 5 V and ground using a 3.3 V signal
I am working with a PCB which looks like shown below. Switching the central line between 5 V and ground toggles the LEDs.
I had this PCB connected to a 5 V Arduino dev board where the switch line was ...
- 53
0
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2
answers
57
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Can I pull down with 5V logic a not-level shifted (which is at 2.8V logic pulled-up) input? How to pull it up to 2.8V again, with no level-shifters?
I have a Distance sensor which has an enable pin (XSHUT pin in the diagram) which is pulled high in its own PCB module at 2.8V, to enable it to work. My Attiny85 MCU, which controls the sensor, is at ...
- 567
1
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1
answer
209
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MAX134 and MAX3001E Troubleshooting
This is going to be a long question because I plan to include a lot of context that I feel is important to grasp the full scope of my issue.
I am currently a senior year university student hard at ...
3
votes
4
answers
768
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How can I shift the output voltage of an encoder to an MCU-acceptable voltage range?
I am using an encoder in my circuit operating on 5 V and the maximum output voltage of my optical encoder is 5 V. I am using the TI CC1350 Launchpad MCU to read the encoder signal, but the problem is ...
- 65
0
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2
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241
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Low-Voltage Unidirectional Ground-Level Shifter
I am trying to interface the status LEDs of a third-party device to the GPIO of my ESP32. I am using internal pull-ups on the ESP32 inputs and trying to trigger on the voltage drop that occurs when ...
1
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2
answers
169
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TXS0108E8 Specification in Mbps, what is the equivalent in MHz?
I am looking at a datasheet of a level converter (https://www.ti.com/lit/ds/symlink/txs0108e.pdf?ts=1634046719564&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTXS0108E - TXS0108E8) and ...
- 115
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0
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133
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PCA9306 Level Translator Output is coming without providing Enable Signal
I am using PCA9306 board for level Translation .The schematic is given below.The board is purchased from third party not made by me.(https://www.sparkfun.com/products/15439)
I need to control the ...
- 2,593
3
votes
1
answer
105
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Level Translator Impedance Matching Termination Resistor For High Speed?
I want to connect level translators like 74LVC1T45 to a microcontroller to translate high speed signals from 3.3v to 5v. I want to make sure it works for frequencies up to 40 MHz. The traces on the ...
- 31
0
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2
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421
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Communication between two microcontrollers with different operating voltages (5 V and 3.3 V)
I want to communicate between two microcontrollers - one is PIC18F2550 and the other is STM32F103VET. They operate at different voltages: 5 V (PIC) and 3.3 V (STM32). I would prefer to use SPI ...
- 103
1
vote
1
answer
48
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Normal current flow in LSF010x level translators
I am reviewing the datasheet and design documents for a level translator. TI has a great video explaining the operation of this device. I understand how the device works but my only concern is with ...
- 183
0
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1
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1k
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3.3V to 5V logic level shifter with 3.3V microcontroler board and 5V arduino sensor
I would like to use logic level shifter like the one above.
3.3V logic level would be connected on NodeMcu 3.3V microcontroller board pin, while 5V level would be used for Arduino sensor.
What ...
- 97