All Questions
16
questions
0
votes
1
answer
199
views
Diode in parallel with AC solenoid valve
I have a circuit I'm trying to design to fire both 120VAC and 24VDC solenoid valves. We have relays that work on 12vdc for the coil, and can switch AC or DC. the valves are normally around 30W. I ...
- 137
0
votes
1
answer
163
views
Is this (working) 2-doorbell system dangerous?
In a previous setup, I had two doorbells, each one with its own 10V AC transformer, as detailed in Why is it impossible to connect these two doorbells in series or parallel?.
I now know it was ...
- 1,946
3
votes
3
answers
428
views
Door bell solenoid under alternating current [duplicate]
In my house, I have a set of door bells, fed by a transformer without a bridge rectifier.
Each of them basically consists of a solenoid with a spring loaded core, so when the circuit is closed, the ...
- 33
0
votes
2
answers
171
views
Why doesn't an AC solenoid valve open and close as the AC current alternates? [duplicate]
I'm asking about a true AC solenoid here, not a rectified AC solenoid.
Why doesn't an AC solenoid valve open and close with the AC current?
I've found descriptions of shading rings, but it appears ...
- 1
7
votes
1
answer
1k
views
Why doesn't an AC solenoid coil change magnetic polarity on each cycle?
I am trying to figure out how an AC solenoid coil maintains its N and S magnetic polarity.
Since in a sinusoidal AC, current alternates in both directions. How does the solenoid not change polarity (N ...
- 89
1
vote
1
answer
228
views
Designing AC kick solenoid lock
I am making a kick solenoid lock with AC.
I designed the circuit to run on 220 V, 50 Hz (household plug.)
The inductor (coil) is air core
500 turns, 150 meter (500 ft) in length with inductive ...
- 69
1
vote
1
answer
409
views
Circuit giving values on both AC and DC
I have a generator stopper which works on 220 volt AC (in India 220 volt AC is normal supply) and has an electromagnet which pulls up a lever and the generator is stopped.
It works perfectly when the ...
- 39
1
vote
1
answer
334
views
Running AC solenoid vibration pump with DC voltage
Ulka e series solenoid vibration pump works with Ac voltage directly connected to main power.
They are rated at 220, 110, 24 voltage 50-60 Hz.
These pumps use an internal diode for removing half cycle ...
- 19
-1
votes
1
answer
2k
views
Circuit to control 24VAC OR 24VDC solenoids
Is there a circuit out there that could control both 24VDC or 24VAC solenoids from a 24VDC power supply? I am working on a sprinkler control board that I would like to be able to use both on. The ...
- 149
1
vote
1
answer
141
views
LEDs and high currents
In smartening up my doorbell I've been playing with my illuminated pushbutton and have fallen into a bit of a rabbit hole. The doorbell normally:
simulate this circuit – Schematic created using ...
- 97
1
vote
4
answers
4k
views
24 VAC sprinkler valve using DC power
I am creating a circuit that includes a 24vac sprinkler solenoid. I need it to be portable so I'm planning on using DC current rather than AC. What is the best way to do this? If I just use straight ...
1
vote
1
answer
885
views
Water Solenoid Valve 12 DC vs 220 AC
I want to buy some solenoid valves for watering system and attach it to Raspberry. I have choice of Solenoid valve with 12DC and 220AC. Is there any difference between them? I mean, maybe 220AC valve ...
- 167
1
vote
1
answer
713
views
Best way to power a 110VAC solenoid
I recently purchased a 110VAC solenoid and wanted confirm the best way to power it (see link below):
https://www.amazon.com/gp/product/B00DQ1MEVS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
The ...
- 11
5
votes
1
answer
3k
views
How an AC electric magnet works?
I want to know how an AC electric magnet works since the polarity of an AC current changing 100 times in each second (for 50Hz mains supply) so its magnet polarity(N & S) also will changed 100 ...
- 1,898
0
votes
1
answer
933
views
I have a 110 VAC solenoid and want to know what kind of circuit i should build to control it from my microcontroller?
My solenoid is part of an old espresso machine, the circuit that detected low water level died and i can't replace it. I am adding a micro-controller to remotely turn it on and off and to control this ...
