All Questions
15
questions
0
votes
0
answers
50
views
Surge protector + mains power adapter safe?
I was looking for a surge protected power strip/extension lead that could be mounted, have 6 or more outlets and came with a 5 meter mains cable with Type G (British plug) inlets and outlets. Having ...
0
votes
2
answers
1k
views
5.5x2.1mm Female Connector on 5.5x2.5mm Male Tip
Recently I lost my LG-27GP850 monitor power adapter which was 65w (19v, 3.42a). I could not find same tip size & watts power adapter. That's why decided to use other companies original adapter but ...
0
votes
1
answer
177
views
Converting dry contact to momentary switch with feedback [closed]
I need to adapt a fan that is turned on/off with an SPST momentary switch to also work with a dry contact. Additionally, I need to ensure that the desired fan state is reached when the dry contact ...
- 1
0
votes
2
answers
203
views
I accidentally bought an HDMI (male) to VGA (male) cable that isn't an adapter or converter of any sort. Does this product have any value? [closed]
I have a laptop with an HDMI port. I have a monitor with a VGA port. I wanted to connect the two. The website I bought this cable from labeled it as an 'adapter' so I assumed it would do the ...
- 1
0
votes
2
answers
5k
views
How can I build a composite video to scart converter?
I'm interested in building a composite to scart adapter.
How can I?
- 101
1
vote
2
answers
1k
views
How can 10V AC change to 12V DC?
This is a circuit that takes 220V DC as an input. I understand how the 220V AC changed to 10V AC and changed to DC by whole-wave rectifier. But why is it 12V??
- 11
0
votes
2
answers
107
views
AC to DC converter device (AC adapter) with adjustable output voltage and adjustable output current [closed]
Is there a device available in the market that can take an input AC from mains and convert it into DC and output it, the output current and voltage must be adjustable.
I know there are AC adapters ...
- 335
0
votes
3
answers
4k
views
Can I use a power strip with max 250v to a 120v power outlet without a converter? [closed]
I'm going to move to Canada from EU. From my research, most people said that if someone from US moves to EU, they'll need a power converter otherwise it might fry the thing.
My question is, if I use ...
0
votes
1
answer
68
views
What converter to use?
I am going to build a stage box, and I need 5V for that (to add some logic, maybe even later an STM32).
I also need mains (220V) for a 12W RGBW LED PAR light.
At first I thought to put in the box a '...
- 14k
4
votes
1
answer
13k
views
Polarity symbols on universal AC-DC adaptor
I have a universal AC-DC adaptor that has the following symbol by the polarity switch:
Is it safe to assume that the top part of the diagram indicates the polarity of the inner surface of the ...
- 41
-1
votes
2
answers
9k
views
Converting a 9v Battery powered Device to a 9v dc power supply [duplicate]
I have an old Vivanco MX300 mixer which runs of a 9v battery. I have it in the same place and it's an inconvenience having it run by batteries. Could I use an old AC/DC adapter that would supply 9v ...
0
votes
1
answer
355
views
Is there a prebuilt PCB that does the equivalent of a wall wart for a similar price?
I am working on a project, and I need to convert 240V AC power to 5V DC to power a microprocessor. I can't use a wall wart, and I am looking for a PCB that will do the same as one - for near the same ...
- 111
3
votes
1
answer
10k
views
Convert Iphone 3.5mm pin to standartd Samsung Android 3.5mm pin
This is a simple question.
I want the new Iphone EarPod to work with Samsung/Nokia phones.
I tried to use the headphone to Samsung phones. Here is the result
Here is the Universal 4-pole Cell ...
- 131
4
votes
1
answer
128
views
Is it possible to make a multi-display adapter as an independent project?
I've been looking at the Matrox DualHead2Go, which is essentially the best/easiest way to go about using dual monitors for a MacBook Pro. Some people suggest using a USB to VGA or HDMI - but obviously ...
- 197
6
votes
1
answer
285
views
AC / DC adaptor, unexpected voltmeter reading
I'm planning on using an AC/DC power adaptor to power an Arduino and various devices.
Before actually powering up the Arduino with the adaptor I wanted to play with the AC/DC adaptor, as it has ...
- 163