Questions tagged [dual]
The dual tag has no summary.
82 questions
0 votes
1 answer
66 views
Can I tie circuits together and replace a dual-ganged volume control with a 3-legged pot?
I'm trying to repair a cheapo radio that has 2 speakers and a little pot for balance. I knocked the radio over onto its face a couple of times and that was the end of the tiny dual 10k volume pot. The ...
- 41
1 vote
0 answers
100 views
Double pulse circuit for MOT spot welder [closed]
I have a MOT spot welder and I'd like to add a double pulse option with adjustable pulse durations, and delay. I have two 555 chips on hand that I'd like to use. I know there are other chips and ...
- 97
0 votes
0 answers
27 views
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 ...
1 vote
0 answers
101 views
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, ...
1 vote
0 answers
68 views
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 ...
- 11
0 votes
2 answers
142 views
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 ...
- 11
1 vote
2 answers
446 views
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 ...
- 197
0 votes
3 answers
448 views
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 ...
- 53
0 votes
1 answer
74 views
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 ...
- 5
-1 votes
2 answers
193 views
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) ...
- 11
1 vote
0 answers
50 views
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?
0 votes
1 answer
440 views
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 ...
- 481
1 vote
2 answers
106 views
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?
- 115
-1 votes
1 answer
84 views
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
- 1,158
0 votes
1 answer
199 views
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 ...
