All Questions
12 questions
5
votes
3
answers
10k
views
Safety when using ATX power supply as benchtop supply
I found many pages where people convert an ATX power supply to a benchtop power supply to give 12, 5, 3.3V.
However the current output can be very high (several amps).
When using this and you NEED ...
- 253
3
votes
2
answers
4k
views
Can you power a smartphone (no battery at all) by a power supply alone?
I have a project in mind, where I need alot of parts that quickly would make this project really expensive.
Then I thought that, all the parts I need is already in a smartphone, but I don't need a ...
- 31
2
votes
5
answers
444
views
How to power up 50 LEDs? (DIY 'fireflies' project)
I want to install lots of tiny LEDs lights in my garden (at least 50).
I DON'T want high voltage cables in my garden so I am thinking in getting a high power, low voltage transformer to power up these ...
- 834
2
votes
2
answers
3k
views
Is there a simple way to DIY a coaxial male connector?
I have a 12V power supply that has a female coaxial plug like the one on the right in this image:
I rigged something up with tinfoil just to see if it would work, but it's not ideal at all. Basically,...
- 301
2
votes
1
answer
169
views
Device power requirements
I am designing a device and I'm confused on calculating my total amperage required.
I have designed this device to have 3 main circuits in parallel that all take 5 V from the same power source:
...
- 21
1
vote
1
answer
245
views
SMD transistor die vs DIP transistor die [closed]
Is the die of SMD transistors different from die of DIP transistors with a unique part number?
Is the power transmission of a transistor dependent on its package type or chip type ?
- 63
1
vote
2
answers
991
views
RF power limiter
I am interested in constructing my own version of an RF power limiter. There exist models such as the 11930A Power Limiter, but are very expensive. The intended use for the device is to limit input ...
1
vote
0
answers
4k
views
How to produce electricity with mechanical power/spring coil
As a home project I want to make a electricity generator which uses a spring coil, which when turned/wound(just like the mechanism in wrist watches) enough times will start unwinding and generate ...
- 119
0
votes
2
answers
147
views
How do I properly calculate the requirements for an on/off switch?
I'm building an arc lighter to learn more about electronics and I'm not certain how to calculate what I need given the components I have. Do I go off the rating for the battery or the combination of ...
0
votes
2
answers
90
views
Mod Projector to Power On when Plugged In [closed]
I have a projector (it's a VOPLLS M10) that’s hooked up to a HomeKit enabled smart outlet, but the projector doesn’t power on when “plugged in” / smart outlet is turned on.
The projector only turns on ...
0
votes
0
answers
148
views
BDCM for small DIY overhead stirrer, how to choose based on Kv?
I want to make a DIY overhead stirrer, to stir a glass of 5 Litres of pure water to bewtween 100-2000 rpm using a common impeller. I want to use a brushless DC motor (BLDC) to drive the impeller. ...
- 153
0
votes
1
answer
162
views
Using european telephone cables for own DC power delivery
I have european telephone cables running through my walls to each room, without any connection/socket. Well... we really do not need any hard line telephone connection and I am into DIY projects, so I ...
- 275