Questions tagged [level]
The level tag has no usage guidance.
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Level shifter controlled by external voltage (VL,VH)
I used a MOSFET to design a level shifter, but it must be adjusted according to this value by receiving an external power source.
For example, if VL = 1V and VH = 4V, the output should be between 1V ...
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Parallel resistor in line-level output
I have a mono line-level output and I want to share it with two devices which will receive the line level output and use it.
In one of those devices I need to use a 10 kΩ potentiometer in order to ...
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What is a feasible way to measure water level in a pool skimmer?
I need to implement a wireless autofill system for a pool. The skimmer is the only place that I can install the sensor (nine inches in diameter, made of ABS). When the pool is full it is 2" from ...
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adding a low fuel light
im wanting to add a low fuel level light to my car. it has a fuel gauge, 33 ohms full 270 ohms empty.
the tank has two terminals, one to the body for ground and one directly into the back of the gauge....
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How to do a pulse generator whose pulse width is controlled by a voltage measured in proteus without using a microcontroller or an analog circuit?
how are you?.
I'm trying to emulate the behavior of the HC-SR04 distance sensor in proteus but using variables.
I succesfully could make a simulation of a water tank whose level is indicating by the ...
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Confusion about edge/level triggering interrupt
I have read this answer.
My understanding is, there are actually 2 lines logically:
clock/gating line
event/interrupt line
And the clock/gating line can make the circuit take event input at an ...
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Are those electric fields dangerous?
Is 8.6 amperes per meter, 70 microtesla, 0.70 gauss, 695 milligauss, safe on long time exposure?
I am just worried.
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Control R channel volume from L channel
I have a mono line level (signal and GND) and I want to create L and R channel from it (to output sound to 2 separate speaker) BUT I want to be able to control the volume of the R channel.
Creating ...
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Get resistor values for voltage divider/attenuator
I have a 10 V audio source that I want to bring to line level: 1 V. That's pretty easy: I just need to use a voltage attenuator, 10:1, like in the image below. I used resistor values of 1 k\$\Omega\$ (...
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Using the same power supply produces no sound [closed]
AS SOME OF YOU ASKED, here is the video showing the connection and the problem: https://photos.app.goo.gl/GRsxQ783Rec6jVxo6
One clue that I got today: the problem happens EVEN if I disconnect the ...
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Water level indicator LED lights up even though circuit is open
I have built a water level indicator with a 555 timer. The supply is a 12 V SMPS adapter, the output of 555 timer is a square wave with a 21 kHz frequency. I pass this signal into AC coupling to ...
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Humming sound when not touching wire
I explained this problem in a video so you can see with your own eyes the problem... touching the GND wire makes the problem go away, however touching the signal wire creates the problem. Even ...
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Convert speaker level to microphone level
I have a digital piano without line output (not even earphone output) but I would like to record what I am playing. So I decided to convert the speaker level to mic level so I can record the audio in ...
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Line level to microphone level to record
I have a digital piano with an earphone output where I can connect a simple earphone (like in the picture below.) It works fine.
I would like to connect this earphone output to my smartphone jack (...
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Voltage divider from speaker to line level generates noise/huming
I have a really old device and I can only access the speaker wires of it. I want to setup a line level from the speaker so I can connect it to another device.
I used a very simple voltage divider (2 ...
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Water level indicator using transistors
I'm trying to designing a water level indicator using npn transistor(BC548). I tried simulating the circuit on PSpice, but I don't know what to add for the sensor. I want a graph.
The circuit will ...
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How to score glass to shine straight horizontal laser line through [closed]
I’m trying to make a DIY laser level, I took apart a cheap one to see how to shape a laser spot into straight lines, it turns out that a simple laser beam passes through a small piece of glass (or ...
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The reason behind LEDS getting dim (Water level indicator using ULN 2003) [closed]
**
Whenever I switch on the circuit, the LEDs glow fully for a second and gets off. After 2-3 seconds they start glowing slowly.
What might be the reason for the above?
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Picking a FET for Logic Level
I've always been confused when picking a FET to be used for logic level signals. There are so many factors to look at for FETs, I get overwhelmed.
In this case my supply voltage will be a 3 alkaline ...
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What are the voltage levels in 100 Base-TX Ethernet?
I know what the differential voltage looks like. If you measure across Tx+ and Tx- it goes from -1V to 0V to 1V and so on, but how are these voltage levels actually transmitted?
Does Tx+ go from 0V - ...
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Simplest way to check if an audio level is line or micro?
I can check level audio on a VU Meter or dBFS meter. What's the simplest way to check if an input audio level is line or micro? Can I use a multimeter?
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lowering output level of a phono preamp
I built a RIAA phono preamp that works great from these schematics:
But the output level seems a bit too high. What would be the best way to lower it?
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Sound level meter using a microphone with ADC
I'm working with STM32F4, MAX4466 amplifier and a condenser microphone. In other words, Adafruit 1063. I want to get the sound level in dB unit. I know:
Microphone sensitivity: 0.0063096 V/Pa
...
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Level sensor Transmitter
I have a level sensor and transmitter(4-20mA standard) of Qidian Automation for sensing level of liquid in tank having capacity of 1000 litres. On transmitter it is displayed 0.516 when tank is half ...
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Strange levels on UART TX
I am trying to get the boot chatter from a UART on IOT device. When powered up TX line goes high as expected (3.3V), but when it starts "talking" - scope shows that hi/lo levels swings are ...
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How to control one motor with two float switches
I have 2 tanks , one is under another and hopes to pump from under tank to upper one using a 0.5 Hp single phase motor.By connecting float switches for both tank,can I control the motor to turn on ...
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Audio line level conversion from consumer to unbalanced (presumably) pro 1/4" jack of unknown sensitivity and impedance. 400W 1980s PA amp
I have a lovely pair of speakers that achieve their almost flat response by dampening spikes.
Consequently they eat amp power for breakfast.
I have been given a 400W RMS per channel 19" rack mount ...
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Need help in understanding the working of battery level indicator
I have got hold of a battery level indicator on net. I works but I am not able to understand how it is functioning.
I am new to electronics and I just dont want to build a circuit from a diagram. I ...
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Water level sensor. How to read it?
I have a water level sensor in which by varying the level of the water, an inductance change his value in a mobile coil. The sensor have the internal simple schematic like this (i don't know the value ...
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RS485 transceiver supplied with 3.3V. What voltages can I receive?
I'm designing a print for RS485 with the LTC2854 transceiver, but I don't know in what exact situation it will be placed in. So I don't know what voltage levels the other devices will communicate on. ...
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Colpitts / Clapp oscillator crystal drive level
simulate this circuit – Schematic created using CircuitLab
As I understand this circuit has some initial gain at startup, then as the oscillation builds up gain goes to unity at some moment. ...
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FT232R TTL Logic Levels
I have an FT232R chip hooked up to my oscilloscope with the TX and RX pins joined. I'm sending characters directly to it via Putty. The logic levels I am seeing are 5V low and 0V high. I thought the ...
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Why do we ground the common probe on a 3 probe liquid level sensor?
I have a liquid level sensor with 3 probes, one us common, the other is for low level and the third is for high level. On the liquid level control relay diagram, I've noticed that the common probe ...
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What is the common name for this seal-in relay?
I'm trying to build a hysteresis water pump system with 2 water level switches. Please see the diagram and explanation of this setup I've taken off the web:
The first switch (L) is set at the minimum ...
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How to make a battery level indicator for arduino (The battery is powering the arduino also) [duplicate]
Hi I am building a pocket altitude, temperature and humidity meter with 1.8" TFT display. I have a 1000mah 3.3v Li-ion battery to power the whole system. I also need to display the battery level in ...
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Sensor For Continuous Water Level Measurement
I am designing water level controller for water tank and want to show the water level in LED bar Graph
I know how to transmit data to MCU and show level to LED bar graph but my problem is to find ...
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4-Channel Level Converter outputs voltage when it shouldn't?
I am converting 5V to 3.3V (for a rudimentary Raspberry Pi project). The level converter scenario below behaves as I would expect:
Because HV1 is connected to 5V, the voltmeter connected to LV1 and ...
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PCM5102A: analog output level not what I expected?
I cannot achieve a 2.1 Vrms mentioned in their datasheet (pages 4 and 9). I can only output 1.04Vrms from the 1kHz source. Do I measure it wrong or this is what I should expect? Or maybe I get such ...
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Tank Water Level Indicator Wire
I am building a simple water level indicator (approx like the circuit below) for my tank.
However, I am wondering about the wiring, for I suppose copper cables corrode in water and produce toxic ...
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Point Water Level sensor
The company I work for uses conductive point-level water sensors to determine water level in a small tank. The manufacturer of these sensors has proven to have very unreliable quality control and ~30% ...
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sn74lvc1t45 pullup on the DIR line
The part sn74lvc1t45 we are sing as an SPI translator.
We usually use B -> A which means DIR goes to ground, however in a new design we are reversing this, and as a result, as per the DS it (being ...
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Can anybody help me modifying a reverb circuit on a guitar amp to an FX loop circuit?
I have a solid state guitar amplifier with a reverb tank. I have done a bit of research as to how these work. I now want to replace the reverb tank with an FX loop for normal pedals (instrument level)....
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Will this water level indicator circuit work for my project?
I have only rudimentary knowledge of electronics so I ask for your forbearance.
There are many water level indicator circuits, of the type shown below, listed online and demonstrated on YouTube.
The ...
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Selecting a logic level MOSFET compatible with 3.7V power source
Continuation of prior question: Logic level mosfet to switch on 3.7v battery
I am a 'mature' entrepeneur Arduino level electronics noob, apologies. Want to build a flashing alert using 3W LEDs in ...
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Need a simple buzzer/LED circuit for espresso machine [duplicate]
I have an espresso machine that I tore down, reassembled with fewer components then modified it to fit a specific setup -- kind of DIY project.
The machine has an autofill circuit. After I removed ...
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Water level indicator with PNP transistor
I wanted to create a circuit that Lit's up an LED when water level rises to a certain level.
I have created the following schematics following the https://www.electronicshub.org/water-level-alarm-...
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863
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Capacitor in RS232 level shifter. Data is strictly half-duplex
I have created a level shifter very similar to the schematic at: http://picprojects.org.uk/projects/simpleSIO/ssio.htm except for the capacitor I use 47nF because the page claims:
at high bit rates ...
user152879
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I2C Level Converter
I have an Intel Edison communicating with a Olimexino-85S by i2c. The Intel Edison works with 1.8V levels while Olimexino does it whit 5V levels. I am using a Level Converter with pull-up resistors in ...
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CP2108 with level converter txb0108 - UART communication TTL and LVTTL
My project uses four different modems (one 3v3 LVTTL(?) and three 5v TTL) for AT communication.
Each modem has a UART interface (TTL compatible).
For my application, i chose the CP2108 to ...
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Negative level shifter
I need to connect two circuits that use different PSU voltages.
The first is a microcontroller clock generator, it outputs a clock 0V to 3.3V at 150KHz as maximum freq.
I need to connect this clock ...
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