Linked Questions
15 questions linked to/from Bidirectional 5 V to 3.3 V level shifter
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How to shift-up logic signal from 3V3 to 5V for NeoPixel [duplicate]
I'm working with NeoPixel led strip and a microcrontroller which run at 3.3V.
As you can read in the NeoPixel documentation using a micro with 3.3V out on pin require the ...
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votes
1
answer
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Voltage Amplifier circuit for PWM amplification [duplicate]
I am using the raspberry pi to generate a PWM signal to feed the servo motor. The output voltage (Max) from a Rpi GPIO is 3.3V whereas I need it to be 5V for my specific application.
So I am thinking ...
- 179
0
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2
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824
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I2C Voltage levels with difference [duplicate]
I have an I2C slave device in which the maximum input voltage to SCL & SDA is 3.6V.
And the I2C Master device is PIC16F877A operating at 20MHz which provides a 5V output on SCL & SDA.
Pls ...
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-2
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1
answer
391
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convert TTL/CMOS output signals to 0V and 5V [duplicate]
Is there an easy way to convert TTL/CMOS output signals to 0 and 5V?
For example, if an ic outputs 0.1V as "0", I'd like to convert it to 0V and if it outputs something like 3.9V as "1", I'd like to ...
- 3
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1
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87
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What's the purpose of the MOSFETS in this circuit [duplicate]
I am trying to make sense of these schematics. UI is an LDO which provides 3V output.
Is it to isolate the BMI160 if there's not enough voltage?
- 225
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1
answer
100
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si7021 with 5V MCU [duplicate]
i need to connect Si7021 wich is an 3.3v I2C humidity sensor with Arduino,
this sensor has open drain SCL and SDA drivers.
is it possible to connect this sensor directly to Arduino 5V?.
- 41
27
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2
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Single transistor level up shifter
I need a simple, single directionnal level shifter for 3.3V -> 5V conversion.
There are many options on the internet, some using a logic ic and some using 2 NPN transistors (converter and inverter), ...
- 1,034
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4
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Using as little pins as possible for multiple buttons
I'm using an Arduino Nano to make some sort of "console" and I'm currently designing the controller. However, I would like at least two of them with 6 buttons each. I have reserved 4 pins for the VGA ...
- 13
3
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3
answers
4k
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how to increase the voltage of a digital signal?
I'd like my Raspberry Pi GPIO port to communicate with a digital circuit that works at 2x the GPIO voltage. The communication will be at a relatively high frequency (up to 500kHz).
The main question ...
- 53
9
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2
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Fast bidirectional 3.3 to 5V level shifter
For a hobby project of mine, I'm thinking about connecting some old 5V SRAM chips like this one to a 3.3V - capable FPGA. The target frequency is 50MHz. After some simulator experiments I found out ...
- 26k
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3
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Problems with a two-diode 3.3V -> 5V level shifting circuit
I'm trying to drive a strip of 57 APA102 LEDs from an ESP8266.
Driving just one LED directly (without level shifting) with a very short (about 10 cm) bus seemed to work, even though the APA102 ...
- 633
1
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3
answers
3k
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5V encoder output to 3.3V microcontroller
I'm trying to design a circuit to connect this quadrature encoder AMT11 output signal to my microcontroller STM32L4R5ZIT6P that's running on 3.3V. Since the output from the encoder is 5V, if I ...
- 201
3
votes
2
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Where is the ground/earth used in the Sparkfun Logic Level Converter
I am studying the Sparkfun Logic Level converter and the basic aim of this is to understand how these BSS138 transistors are used in logic level conversion. I have used transistors before in driving ...
- 205
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1
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pulse voltage drops trying to connect 2 devices
Hi I try to connect 2 devices. The first one sends a pulse to the second. The second has a 3.3 V input. And the output pin from the first device has a voltage of around 7.3V. VCC of the first is 12 V.
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4
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240
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High Speed Op-Amp recommendation [closed]
I am tasked with the issue of driving an IC that wants 5V input signals from an FPGA (3.3V outputs). Now, the most daunting part of it is the slew-rate requirements, with rise time \$t_r = 1.5 \text{...
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