Questions tagged [level]
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81 questions
5 votes
3 answers
706 views
Discrete transistor-based 10-LED bar graph voltage level indicator
This circuit works excellently up to 3 transistors. Is it possible to bias the rest transistors so that the device would be able to measure in the range 0..Vcc? What is the math formula behind this ...
- 165
2 votes
3 answers
163 views
How much would the crystal drive level be in my circuit?
I sadly don't have an oscilloscope to check. I would like to ask someone here who knows better what the drive level of the crystal would be in my circuit. I am powering it with 6 volts right now but ...
- 51
0 votes
1 answer
153 views
What voltages do rack mount audio equipment use?
i am an electronics engineering student looking to work on analog audio equipment for studios. Can anyone please tell me what kinds of signaling voltage do these blocks use? PC -> patch bay -> ...
0 votes
0 answers
36 views
Using 1.8V digital signals with TPS281C100A and AP22653A
I plan to use the following two devices: AP22653A and TPS281C100A and drive the enable pin from 1.8V logic. They are specified for minimum 3V3 operation, but for both inputs the VIH is 1.5V. Would ...
- 25
3 votes
6 answers
1k views
Water level monitoring: simplest way
I like to develop a water level monitoring for my cistern tank: empty level, low level, mid level, high level. One of my booster pumps broke because it runs even when there is no water in the cistern ...
- 31
1 vote
2 answers
187 views
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 ...
- 11
0 votes
1 answer
302 views
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 ...
- 103
0 votes
1 answer
453 views
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 ...
- 13
1 vote
0 answers
121 views
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....
- 11
0 votes
0 answers
350 views
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 ...
- 168
0 votes
4 answers
1k views
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 ...
- 1,302
1 vote
2 answers
1k views
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.
1 vote
2 answers
102 views
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 ...
- 85
3 votes
1 answer
722 views
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\$ (...
- 85
0 votes
3 answers
306 views
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 ...
- 85