All Questions
22
questions
0
votes
3
answers
872
views
Confused in readings of oscilloscope
I have this reading of a oscilloscope for a half wave rectifier:
Pk-Pk voltage is 17.6V.
The channel is set to 5V division. I asked my dad who is a electric engineer and he told me that Vp = 17.6/2 = ...
- 491
0
votes
1
answer
86
views
Higher voltages between protective earth ground (mains) and function generator than expected
I uploaded a video to YouTube specifically to help me explain my question. Please watch it if you can.
Otherwise, here is my text-based description:
I have an oscilloscope, function generator and ...
- 109
0
votes
2
answers
78
views
Why would a 32VDC fuse only work with 22VAC?
I am trying to find a 6-port version of this: https://czh-labs.com/products/czh-labs-din-rail-mount-ac-dc-532v-10-position-power-distribution-fuse-module-board-p0445
I found something close (https://...
- 105
0
votes
3
answers
647
views
Want to make a Chia farm of 156 external hard drives [closed]
I have two questions:
How do I not burn down my house
Is there any way I can use less electrical outlets by getting AC/DC splitters?
Question 1:
So basically I got 156 external hard drives. The AC ...
- 101
2
votes
2
answers
2k
views
Identify the tip polarity on this AC adapter without plugging it in
I have a 230V AC-DC adapter/transformer from Europe that I am trying to replace with a 120V version. I am trying to determine the tip polarity of the DC output. I cannot simply plug it in and use a ...
- 123
0
votes
0
answers
436
views
AC-DC converter to drive a dc motor (treadmill)
I would like to fix my treadmill.
I have connected a SCR voltage dimmer (WINGONEER AC 220V 4000W) in series with a full-bridge-rectifier (GBPC5006), to the dc motor.
When I move the potentiometer, ...
- 141
0
votes
1
answer
349
views
withstand voltage of AC DC power module
i read the datasheet of irm=20-5 which is a AC DC power module it takes a input of voltage of 85-305VAC
and converts into 5V DC at output ,in the datasheet it is written that the withstand voltage is ...
- 307
1
vote
1
answer
40
views
Power for 1 Device, 1 MCU, and 2 modules
I have four things I need to get power to. The first is a device that needs 48V and 30W. The other three include an MCU and two modules. Each have various pins that need either 3.3V or 1.2V. I’ve ...
- 11
-1
votes
1
answer
913
views
What does it mean for a power supply to have an output range?
I had a power supply blow and I replaced it with one from the same company with the same model number. The new supply has lightly different specification than the old supply. Oddly (to me) it gives ...
- 111
0
votes
2
answers
2k
views
Is It Posible To Have Step Up Power Supply Without a Transformer?
I am trying to design a high voltage low current power supply. My purpose is to design it without a transformer. For example circuit like this :
My input is 220V AC after this circuit I am going to ...
- 5
3
votes
2
answers
4k
views
Can I use a 20V or 24V to power up a piano that needs 21V? [duplicate]
The power adapter of the piano should be AC/DC 21V, 1.5A.
But I can't find in a short time to buy something exactly like that, but I found this options:
20V, 3A or
24V, 3A
Can I use one of this to ...
- 133
0
votes
3
answers
524
views
How to get rid of voltage drop of this timer circuit?
I'm getting ~ 12VAC pretty stable without load with this circuit
However when I try to convert this signal into 6VDC up to 500mA or 1A with AC to DC conversion and a regulator;
I get huge voltage ...
- 117
3
votes
2
answers
13k
views
AC Adapter gives much more voltage than it's supposed to [duplicate]
Hello!
I have this one older AC-DC adapter from Korg (wallwart?)...
...that I have been using for my (guitar) effect pedals for a few years, and I recently found out (when I was doing some ...
- 167
0
votes
3
answers
1k
views
link voltage and link capacitor basics [closed]
I am currently getting into the topic of electric vehicles and I often come across the terms link voltage and link capacitor.
simulate this circuit – Schematic created using CircuitLab
As far ...
- 241
1
vote
2
answers
929
views
How to plan my LED circuit, voltage, and resistor
The LED emitters in my outdoor lamps blew out and I need to replace them but I have to rebuild the emitter from scratch because replacement parts are not available. The whole lamp was made in China. ...
