Questions tagged [dual]
The dual tag has no usage guidance.
82
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Preventing current between batteries
I charge 2 lithium Ion boat batteries from a single solar regulator. I have the positive leads from both batteries in common to the regulator and charging is fine. But if charge current is low I want ...
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Ceiling fan dual color lighting switching
Some ceiling fans now have two different sets of LEDs, of different color temperatures, which are selected by switching the power on/off. I would like to know how this switching circuit works, it has ...
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Delta-Y transformation and dual circuits
I have been thinking about the relationship between delta-Y transforms and the dual of a given circuit and I am confused about a sort of overlap I see.
Take a delta circuit with resistances as shown, ...
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Addition of a voltage selector switch for a dual-voltage motor
I have a 3hp, single-phase 120V / 220 V, 1750rpm, 184t frame size, compressor-duty motor.
I would like to include a voltage selector switch in the junction box, to select 30A 120 V or 30 A 220 V ...
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I need to find a part for my PCB
I have a PCB that I only have one component left to fit on the board, but I do not know what it is or how to get that. It say 3/8 on the part but haven't found anything like that.
The plan is from ...
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Dual Slope integrator voltmeter improvement in Design
So, I'm attempting to design a dual-slope integrator voltmeter. I have the following block diagram so far.
Now an AVR microcontroller will have an ADC pin in the range of 0-5 Volts . So negative ...
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3
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I need a potentiometer to swing -/+ 5V
I need to have one "KNOB" that swings a dual power supply (+/- 5V) from balanced (+5 and -5) to 0v +5 or 0V and -5V and of course anywhere in-between.
My first thought is just the +5V ...
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Measure dual voltage with single power
I have to build an MCU system that has to measure a dual voltage, V+ and V-.
The problem is that my system needs to be powered with a single power supply.
To measure the V+ input, no problem, I simply ...
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62
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Duality Principle, but confused by the example
The dual of a Boolean expression can be obtained by interchanging sums and products; also interchanging 0 and 1.
But the dual of xy̅ + 1 is (x' + y) · 0 ( I think)
Or the dual is (x + y) · 0.
Q: do ...
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2
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Need power supply with +24v, 0v, -24v that provides min 10A [closed]
For my project, I need a power supply with +24v, 0v, -24v that provides minimum of 10A...
Need to have two loads (one positive 24v & 0 and one negative -24v & 0) need to have common point(0v)
...
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Dual fixture ( Stencil, SMT carrier...)
I have an output upgrade project on SMT, part of which is dual fixture (2 sides BOT & TOP on the same side).
So is there anyone here with experience with this? Can u give me some advice on this?
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Dual band Wi-Fi antenna simultaneous 2.4+5GHz transmission
There are APs that have dual band antennas and seem to offer simultaneous 2.4+5 GHz operation. I wonder how this simultaneous dual band operation technically works (2 radios using one antenna.) A ...
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How is the voltage split?
Can anyone please explain how from +VO which is 5V and -Vo which is -5V, at the output VDDL is +6V and VEEL is -4V?
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Thermal rise for a dual diode package (common cathode)
How would I calculate it when both diodes in a D2PAK are used in continuous current of 2.5 A with an ~40 C/W on the graph below ?
https://eu.mouser.com/datasheet/2/389/stth2003-956882.pdf
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Dual LED Configuration [closed]
I'm looking for a dual color red/green LED that is not common-anode, not common-cathode, but common anode-cathode (anode of one LED shares a pin with the cathode of the other LED). Can anyone list a ...
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Complicated battery boot jump
2x 300watt solar with 2x 12volt battery’s …
I want to have a 3 phase switch.
Left switch is battery 1
Middle switch is both battery’s off.
Right switch is battery 2.
What switch that can carry 1000 ...
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What does dual DAC mode mean for this microcontroller board?
I have a STM32 development board with this manual, and regarding its two DACs somewhere in stm32f4xx_hal_dac.c file, the following is written:
...
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Dual power supply switch-over LED circuit
I need a simple circuit that work with two LEDs to do the following:
When a 12VDC power supply is on, LED1 must be on and the LED for the battery LED2 must be off.
When the power supply is of LED1 is ...
user293999
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433
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Combine multiple power supplies with shared negative
I have a computer power supply that supplies 24V, 12V and 5V. The 24V rail is dead but all other outputs work. (I need to figure out what's busted).
Can I add a 24V power supply alongside the existing ...
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What do these dual DC rating numbers on my Casio PB-2000C mean?
All devices I own except one have only one rating that matches what the PSU says, for example "12V ⎓ 2.5A" and that means if I have to get a replacement PSU it has to be 12V and at least 2....
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Can I operate 2 electromagnetic locks using the same power supply?
I'm using this power supply:
Specs:
Input Voltage: AC90V-AC260V 50-60HZ
Output Voltage: DC12V
Momentary Current: 3A/5A
Persistent Current: 3.5A
To operate my ...
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3
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Connecting two op amp circuits each of which use dual supplies, but where the two supply voltages differ
One of the op amps uses +- 12 volts and the other +- 5 volts. With only one circuit, I understand that the common ground for the entire circuit is midway between the two supply voltages, but when the ...
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Common ground with 2 transformers
Beginner question so please go easy on me. My question is around what is the correct way to have a common ground reference on a circuit at that 2 different voltage sources. the below schematic is a ...
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480
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Non-inverting unity gain buffer appears to be inverting
I have constructed a circuit which uses two non-inverting unity gain buffers on one chip as stage seperation. I'm using a TL072CP chip with dual op amps on it and have followed the datasheet design ...
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1
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Power supply with three pins on the output, why? [closed]
I opened up the power supply to a HP printer and I see that the output has three pins. I measured voltage on one pin to ground and it shows 8.3V.
The adapter says: Output 24V @ 1A. Is this a dual rail ...
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273
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Residual AC voltage after diode bridge in dual power supply
I'm building a +/-24V supply for my first hifi project but I'm having an issue. I use a dual output 28V toroid, doubled P600M diodes for rectifying (to distibute the load and lower heating), with two ...
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Identification of a sot363 dual transistor
Could you please help me in the identification of the 6 pins dual PNP transistors below.
Thank you in advance.
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What affects the current ratings on constant torque pole changing motors?
Two different motors, one is rated 1.49A on slow speed configuration and 1.43A on high speed. The other motor is rated 6.09A on slow speed and 6.99A on high speed.
These are constant torque pole ...
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Why does the Dual Speed Dahlander motor need a bridge in the fast speed configuration?
On the nameplate of the motor is a Delta/Wye-Wye configuration, meaning you supply the ones (U1, V1, W1) and leave the twos open to achieve the slow speed. And for fast speed you supply the twos and ...
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Circuit with dual power supply
Doing some reverse engineering to a PCB, I drew this part of the circuit. Looking into the datasheets, I found out the comparator (LMC6772) is able to drive the SCR (S6S2) by itself. But the designer ...
user115094
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566
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What are limitations of Millers theorem for amplifier?
I mean to say that are the two circuits one original and other its miller/ drawn exactly equal in all respects or their are some difference in some respect if so please mention.
I am not able to ...
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Dual Comparators connection that affect the design
If we use a dual in package comparator Example LM2903 and do use only one comparator, what should be done with the other one. It is sure that paralleling the two comparator will cause instability and ...
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Supply current of negative rail
I'm using an LTC1983ES6-5 to provide a negative rail for both a MAX4311 and a MAX4395. LTC1983 provides up to 100 mA, but I cannot find in the other datasheets how much current is required for the ...
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Dual supply PCB layer stackup
My PCB is powered from USB port and includes Recom RKZ0505D for powering dual-supply OPAMPs. Recom gives +5V and -5V outputs. So I have:
Top signal & components
Bottom signal & components
GND
...
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Altering schematic for adaptor
I am trying to make a PCB for the attached schematic (mixer.jpg). Rather than run on 2 9V batteries, I would like to plug it into the wall using a +9 / -9V DC power supply.
Do I need both diodes and ...
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2
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Coupled DC/DC-modules - correct input filtering
According to the support from TracoPower I use two THN-30WI modules (±15V) in conjunction as shown below (without each C1 and C2) to produce ±30V.
This works but I get a lot of noise.
The ...
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438
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Dual power supply with BJT. How to do tracking without opamp?
I'm making a 0-±12V 20mA supply for breadboard. Circuit simulates fine with ltspice. How to implement tracking (or tracking ratio) WITHOUT opamp?
I found a schematic here https://groenholdt.net/...
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i want to duplicate a signal generator output
I want to duplicate signal generator output to dual. since i want to use same signal to two different place. Is this possible without amplifying and inverting the signals. Let me share some circuit.
...
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Dual power supply with two boost converters
I currently have a dual power supply, that supplies +/-15V. One -output of the PS is connected to the other channel's +output (GND). Now, the problem is that I need +/-50V. I bought two step-up boost ...
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Replace lamp in old amplifier
I am trying to replace a fried lamp in my very old amplifier (a Dual CV 1280 Integrated). As I essentially only use the mode that is indicated by the fried lamp, I thought I could just switch it with ...
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Why does this buck boost with dual MOSFETs fails output at certain input voltages at light load?
Buck boost design
A buck boost converter for 11A 45V output and 33.0-55.0V input has been designed using the Webench Power Designer. The LM5176 based PCB design was adapted for dual MOSFETs (4 times 2 ...
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Virtual ground before or after low noise LDO?
I have two boards (microphone amplifier and speaker driver) that require +/-15 VDC. The max current required for the boards is 500 mA. Since low-noise dual power supply devices are hard to come by, I'...
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Dual Power Supply (Two 9V)
I am Not Good At This, and I am trying to breadboard this circuit here:
http://www.instructables.com/id/DIY-EEG-and-ECG-Circuit/
But I am stuck on the power supply. The instructions state:
...
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509
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Dual power supply circuit dropping voltage on applying load
I'm not an Electonics professional, and hope someone can explain why the circuit below, I've used to build a dual rail +15v,0v, -15v Power Supply drops voltage down to about -7.7 volts when connecting ...
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Complementary Transistor Pair
I am wondering, why is there no complementary transistor pairs to buy, since their use as individual devices is pretty common in audio amplifier applications.
So for complementary transistor pair it ...
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How to turn off a higher supply from a lower one? [closed]
I have a circuit powered by two 12V batteries in series (total of 24V). When switch A is ON, my circuit powers a regulator that outputs 5V to a board I'm using. I'd like to add a second switch (switch ...
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How can I use a dual 4-channel analog multiplexer independently?
I have a CD4529BCN Dual 4-Channel Analog Data Selector (datasheet).
Here is the truth table:
Here is the problem:
I have two sensors which are resistive. I want to read their voltage via a resistive-...
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Dual Supply from single 24v dc source and 12v regulator
I was thinking about different ways a dual supply could be created, and I was wondering if something along the lines of what I made in this schematic would work. I don't have any kind of formal ...
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Back feeding when connecting one side of circuit to differential op-amp
simulate this circuit – Schematic created using CircuitLab
I am building four 30v voltage sensing circuits to measure battery+/battery-, load+/load-, battery+/load- and battery-/load+ voltages ...
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Principle for converting dual power supply to single
I was recently attempting to build a voltage controlled oscillator from this website: http://www.schmitzbits.de/vco4069.html.
I struggled with it, for various reasons, and eventually found this ...
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