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Results tagged with power-supply
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user 33899
An electronic device that supplies electrical energy to a load. It can be AC or DC input. Typically DC output.
1
vote
Accepted
Removing noise induced by IC (Ground loop?)
Placing a 3300uF capacitor on the batterry: no noise eliminated.
Placing a 3300uF capacitor on the power connector: 50% of noise eliminated.
Placing a 1000uF capacitor directly on MP3's circuit board: …
- 834
0
votes
3
answers
2k
views
Removing noise induced by IC (Ground loop?)
I want to build a simple, portable, MP3 decoder + amplifier. I use a PAM8610 amplifier and a generic MP3/Bluetooth decoder.
When I power each of them from separate batteries (7.4V) it works nicely. Wh …
- 834
1
vote
2
answers
9k
views
Running COB LED without driver (undervolted)
!Hobby project!
I have a power supply form a printer (actually I have 3 :) ). The PSU is 24V, 1.25A.
I want to connect some COB LEDs to this PSU without additional electronics. The idea is that the L …
- 834
2
votes
2
answers
1k
views
How to estimate the maximum current provided by a transformer?
I have a transformer that outputs 14.3V (AC of course) and the current in short-circuit is about 13A (made a beautiful spark when I measured it :) ). Can I guesstimate from here what is the 'normal' c …
- 834
2
votes
5
answers
443
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
-1
votes
1
answer
266
views
Reduce power consumption for AN7316 amplifier
I have a pre-amplifier with AN7316 from a tape recorder. Currently it draws 24mA from a very small 12V battery (I think it is an A23).
The IC has two parts: a "play" amplifier and a "rec" amplifier. …
- 834
0
votes
3
answers
455
views
Help understanding schematic (voltage regulator)
I got this voltage regulator that I wanted to use with a DC source (30V switching power supply from a printer).
(full schematic here )
However, I see that input of the voltage regulator MUST be p …
- 834
0
votes
2
answers
407
views
Efficiency of classic voltage regulator vs. "switching" regulator [closed]
I have this cheap voltage regulator (DIY kit). After purchase I have seen that it requires a huge heat-sink AND a cooler.
The input is 24V AC and the output will be around 12V DC and I will be used …
- 834