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Questions tagged [appliances]

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0
votes
2answers
25 views

In powering household devices, is the voltage preset and the amperage varies as needed?

When powering household devices, does a power adapter have a preset (or in some cases user-defined) voltage, while the device (while turned on) "selects"/draws whatever amount of amperage it needs at ...
0
votes
3answers
80 views

Do 240V AC switches only need to open the active wire?

I want to add a simple inline switch to a small, mains powered lamp (~240V AC, 10W Max). It's earthed; it has a typical 3-core cable with a 3-pin plug. I bought a bunch of switches, expecting ...
1
vote
1answer
51 views

Can i use an AC 15A 250V / 30A 125V rocker in place of a 15A 125V / 10A 250V one?

Amazon sent me the wrong replacement switch so i am wondering if i can use it? Original switch is AC 15A 125V / 10A 250V new one is AC 15A 250V / 30A 125V can i use it without damaging the ...
-1
votes
3answers
76 views

Oven power usage estimation [closed]

Does an oven draw less power when used at a lower setting? I'm trying to calculate the cost of running my oven on the lowest setting as a dehydrator. Wattage is 4800 kWh/cycle is .92 and my cost for ...
2
votes
0answers
116 views

In an induction cooktop, what happens to the coils resistance when there is no pot? Does it vary between pots? How does the appliance respond?

An induction cooktop (or an induction rice cooker) uses a copper coil with a high-frequency alternating current going though. The magnetic flux heats any iron-alloy pot placed above. But what ...
1
vote
1answer
65 views

Convert a blender into a dimmer lamp

I was sitting around and suddenly wanted to convert my old blender into a lamp. The control panel would act as a dimmer switch. (And maybe the pulse button would be a big hit at raves.) Can I just ...
11
votes
1answer
1k views

Symbols: Double-arrow circle enclosed “10” on electronic appliances

What does the symbol that says 10 inside the double arrowed circle mean? I have seen a similar symbol on another appliance that had the number 25
3
votes
1answer
76 views

Transient Current Effects from Independent Charging Circuit

I've been working to automate a household appliance. The device is normally controlled by a switch that must constantly be depressed in order for the device to operate. Instead, I replaced this ...
0
votes
0answers
59 views

Replacing a blender circuit breaker

I'm replacing a blender's circuit breaker. 750W -Blender Current breaker is rated at 2.8A ~230V So the maximum power output is 640W But the blender itself is rated at 750W. So the lower rated ...
0
votes
4answers
323 views

Will a 2000w Step Down Transformer be enough to safely power a Japanese Oven Toaster? [closed]

I recently acquired a Japanese oven toaster, with a maximum power consumption of 1000w at 100v, and I would like to use this appliance in USA. I was told that for safety reasons I should get a step-...
0
votes
1answer
59 views

Power reading in different places

Currently, I have a software which able to read voltage, current, active power, apparent power and reactive power from appliances which I assume the readings should be approximately same even though I ...
0
votes
3answers
153 views

Air Purifier Circuit Mod Help [closed]

I have an air purifier I would like to modify the PCB to an always on state at high setting when plugged in. This would allow me to control the device with and Amazon Echo compatible smart plug. ...
8
votes
4answers
2k views

Is it true that when extending a high watt appliance with a extension cord I should use a thicker (higher AMP) cable than the cable of the appliance?

I am an European, so I am not sure if that matters. All I know is that I need a cable with the right amp or wattage throughput capability. Our cables are named as 3x1.5, 3x2.5, 3x3.5 etc, I guess ...
0
votes
1answer
54 views

How to analyze time-varying current signal?

I want to understand the power consumption profile of my electric blanket in order to determine (a) if it's working properly and, if so, (b) how much power it's consuming. I took some readings with ...
0
votes
2answers
1k views

Can I use an extended power cord for washing machine? [closed]

I have heard that the usage of a power cable to a washing machine is not recommended, however I do not have other option for connecting as I have no bathroom power outlets. What is the general ...
16
votes
4answers
5k views

Why is the neutral pin hotter than the live pin?

I frequently use an Immersion Rod Water Heater (shown below) and I have noticed that the after unplugging the heater, the neutral pin of the 3 pin plug is quite hot (about 5 degrees more - but not ...
0
votes
2answers
47 views

Determening some home appliances. Based on their power consumption behavior

I placed a current sensor on the main power line going into my household and I m trying to use that data to determine if an appliance is pluged in such as a fridge or heater. It should be easy since ...
-1
votes
1answer
83 views

Why would my cooktop burner short across the bottom of a pot?

I had a stainless steel (?) saucepan cooking on my electric stove and there was a buzz and shower of sparks and the element went out. The bottom of the pan has a black mark, kind of like what happens ...
0
votes
0answers
67 views

Single-phase motor and speed control with used parts

Asking for a friend who is intending on setting up a one-off, custom-built appliance for a farm. He needs a motor and control scheme for "rotary impact cleaning". It should be: Low-cost (insofar as ...
0
votes
1answer
3k views

Reversing washing machine motor [closed]

I know how to reverse a single phase induction motor. I also try to understand it using this link. But, I can't understand how to reverse the motor of fallowing wiring diagram. In this diagram, RED ...
0
votes
0answers
60 views

LED upgrade for cooker hood (12 V AC to 240 V AC or 12 V DC)

I've got a cooker hood with some problematic 2x 12 V 20 W G4 bulb downlights. I want to replace them with LEDs. Unfortunately the units are physically too small to accommodate suitable LED G4s. ...
-1
votes
1answer
73 views

How to keep a 110V appliance ON for 1 minute every 5 minutes, without arduino? [closed]

I need to turn ON an appliance (110V, 0.5A) for 1 minute every 5 minutes. The immediate solution that comes to mind is arduino/raspberry-pi and with a relay. What kind of circuits would help me ...
0
votes
2answers
115 views

Does it make sense to only mention amp requirements and not voltage requirement, or vice versa?

When reading about the electrical needs of various electronic devices and/or appliances, I often see a requirement for only one of the various measures related to electricity. For example, it will say ...
3
votes
2answers
134 views

AC powered microcontroller issue

Context: I got this fancy freezer from Liebherr a while ago and it stopped working. The compressor would fail to run continuosly. I have narrowed down the issue to the control board (behind the front ...
-1
votes
1answer
2k views

Can 230 voltage device use 220 voltage? [closed]

I have 230 voltage appliances, those are gifts from Germany. I live in Vietnam where the voltage is 220 V. So can I use those appliances safely in my country?
0
votes
1answer
1k views

replacing home appliances' internal 120v to 220v [closed]

stackexchange, am new to electronics but am fairly resourceful. am asking this question out of curiosity. i have 2 home appliances which I bought in US. A Sunbeam hot shot (hot water) dispenser ...
1
vote
2answers
124 views

How to discern earth from neutral?

I have a three cable circuit in the kitchen1, I know that one is live, one neutral and one is ground. However, there is no colour2 matching between the standard and the real cables, so I can't use the ...
0
votes
1answer
94 views

How can a metal object bond to a live object when not touching anything else?

My electric stovetop developed a fault which caused a short circuit inside the unit (sparks flying and all). The fault occurred as one of the knobs came loose and the metal strut that was supporting ...
0
votes
1answer
1k views

Minimum resistance for a home circuit to not have short circuit

Say the circuit breaks at 10A, and we got 220V like in Europe. If I stick a wire directly from one hole in the outlet to the other, there will be a short circuit. But what is the "treshold resistance" ...
1
vote
2answers
330 views

Powering AC Appliance with DC

I have an AC speaker set and it is plugged into an outlet. Then the outlet is put into a transformer where the transformer output is 17V 2.5A AC. Then from the transformer is put through a bridge ...
2
votes
5answers
4k views

Appropriate relay for water heater rated for 220VAC/1500W

I've created a complete hardware platform using a Raspberry Pi as master/controller, an Arduino nano and two RF24l01 transceivers, which should control some household electrical appliances. The ...
0
votes
1answer
108 views

“Phantom” touches on appliance's capacitive buttons. A serious problem? [closed]

We have two electronic devices that operate well by themselves. Device 1 has touch (I assume capacitive) buttons. If device 1 and 2 are turned on they are fine. But if device 2's motor is engaged, ...
2
votes
3answers
110 views

Sensing state of an electrical appliance [closed]

I know nothing about electrical engineering however... Is there a way I can detect when an electrical appliance is on? For example when I turn on my tv, a small blue light turns on so I know, but say ...
1
vote
1answer
2k views

Spark in blender motor [closed]

I was trying to repair a blender whose speed buttons were not working. I thought of removing the speed regulating circuit altogether and directly connect power to the motor. Now, when I run the motor ...
2
votes
2answers
366 views

Can a household device limit consumption to avoid tripping circuit breaker?

A common problem for resistive loads, like household heating appliances, is that peak current is drawn on startup. I have come across ICLs (inrush current limiters), which are cheap components. Do ...
1
vote
1answer
764 views

Why we need waveguide in Microwave?

why we need waveguide to move microwave power from magnetron to microwave cavity ? can't we just push magnetron antenna inside the cavity ? why it has to go through waveguide ?
-1
votes
3answers
2k views

How to build a simple electric geyser for a project? [closed]

I want to build a simple electric geyser* as my college project. I would appreciate if someone helps me in this. I need a guidance about how I should make it, what principle I should use, what ...
-1
votes
2answers
7k views

Washing Machine Motor [closed]

How does a washing machine motor changes its direction after one cycle? I have the basic idea that a switch has to do something with it but want to know what exactly happens and how.
0
votes
1answer
108 views

Is it safe to swap a fused IEC cable to non-fused when in another country? [closed]

I have recently moved from Singapore to New Zealand and have brought a number of eletrical applicances with me e.g. computer, ricecooker, router, etc. Since the voltages are the same (currently ...
5
votes
1answer
4k views

Why does a mains appliance give a shock after it is completely unplugged

My wife has a food processor, bought a few weeks ago, powered directly from the A.C. mains, i.e. not via a "wall wart" power supply, and, after it has been switched off at the wall and fully unplugged,...
2
votes
2answers
2k views

Household appliances frequency conversion

I'm curious as to how household appliances are able to convert frequency, obviously they can change voltage through transformers. If anyone could just tell me what devices change frequency and I can ...
3
votes
1answer
5k views

Design of a nichrome heating element - achieving predetermined power dissipation

I want to make a nichrome heating element with 1500 watts of heat being produced while running on 120v AC. This will be part of a air heater as a fan drives air over a circular coil of nichrome wire. ...
2
votes
4answers
7k views

How does a domestic appliance “know” how much current to draw?

I have a small wall plug which takes 240V 50Hz AC from the mains, and can give me 500mA 5V DC. I suspect there is a transformer stepping the voltage down and a bridge rectifier converting the AC to DC....
3
votes
2answers
390 views

Inductance in Power cords

Why doesn't the Inductance/Capacitance of Laptop charging wires and other appliances effect the performance of the devices/ power supplies? An inductance would be introduced if the wires are lying in ...