Questions tagged [low-voltage]
Low voltage refers to voltages in a range from 1) 50–1000 Volts AC (root mean square) and 2) 120–1500 Volts DC according to standard IEC 60038 of the International Electrotechnical Commission.
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ICs for Low Voltage Analog to Digital Conversion [closed]
I'm looking for an ADC IC that works in very low voltage ranges (0 - 50mV), and with a resolution of at least 1024 steps. I was wondering if anyone knew if this sort of device even existed, or what a ...
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Ring Video Doorbell / ghost rings with 16 VAC solenoid chimes [closed]
I have:
Ring Video Doorbell
(x4) solenoid chime operating on 16 VAC
The chime is a pre-2000's analog device. Presumably it uses an analog circuit to ring the solenoids in a pattern to make a ...
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Solar emergency LED Night light control design: Solar panel, 5 V : 3.7 V 18650 Li-ion or similar as Vref. No negative voltage. Only GND. Which Op-Amp?
Solar charging daytime with 0 V battery output to micro LED chain.
At nightfall, solar voltage drops to 0, activating Vout: 3.7 V or alternative Lithium chemistry to power 30 ft (100×) white LED rope ...
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Effect of high voltage electric field on the motion of charged particles in an isolated tube
Please refer to the image for a visualization of the schematic.
I feel I am trapped at this stage. I am trying to understand the following:
In a closed container, charged particles are moving from the ...
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Voltage regulator with polarity depending on input
I'm pretty new to electronics, I have some very basic notions, and I need help with a little project I'm working on, basically I have an input that can vary between 4 and 13 volts and I need to keep a ...
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Troubleshooting a Low Voltage Cutoff (LVC) Circuit for Overdraining Prevention
I am attempting to design a Low Voltage Cutoff (LVC) circuit to safeguard against overdraining my 12V rechargeable battery. The objective is to halt circuit power once the battery voltage drops below ...
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Millivolt logger with high sampling rate [closed]
I'm trying to find modern components for a design that would be able to record millivolt range samples at a high sampling rate (~30 kHz) for ~1 hr interval. Key components I can think of thus far are ...
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Low power consumption/leakage tips and tricks (input NC magnetic reed switches)
I have an ATtiny412 that has 2 pins (PA1, PA2) set as internal input pullups.
These 2 pins (PA1, PA2) sense magnetic reed switches with the NC setting. GND is active when closed on these switches.
The ...
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Need help connecting 10 LED USB powered lights to one power source [closed]
I need help to connect 10 LED string lights into single plug. I wanted to make sure I have enough power, but not burn out the lights.
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Symmetric PCh and NCh MOSFETs for variable resistors
I'm wanting to build a variable voltage-controlled resistor. The resistor would be in series with a 200 uA AC current source and need to be controllable between 1-20 ohm. My current plan is to take ...
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Voltage stabilizer or voltage protection device for irrigation setup [closed]
I have an irrigation setup in a rural area with voltage fluctuations.
The irrigation setup consists of a Hunter X2 Controller powering a pump start relay which in turn runs a 1.5 HP submersible motor ...
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A stable very low-voltage reference generator (a very low-voltage LDO design idea) [closed]
Essentially, I have a voltage which varies between 0.15 VDC to 0.25 VDC, and this feeds into a system whose output is varying because of this variation at the input side. This is summarized in the ...
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LED Fails to illuminate, what am I not seeing in my configuration(s)?
I'm working on a super simple circuit, I want to light the LED.
Power Source 1: 5.5v from 9v battery through breadboard power supply module
Power Source 2: 5.5v from lab bench PSU
LED Info: Vf - 3v to ...
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Philosophy of safety by Double Insulation
In a Class I appliance, when a fault occurs that brings dangerous voltage in contact with accessible conductive parts, the installation wiring fuse or GFCI will not only shut down the dangerous ...
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Op-amp not increasing amplitude of signal
I was doing some LTSpice simulation with an op-amp to amplify a 1 millivolt 40 kHz sine wave. However, in the output signal, it had just raised the voltage of the whole waveform, it decreased the ...
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