Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 33899

An electronic device that supplies electrical energy to a load. It can be AC or DC input. Typically DC output.

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 …
IceCold's user avatar
  • 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 …
IceCold's user avatar
  • 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 …
IceCold's user avatar
  • 834
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: …
IceCold's user avatar
  • 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 …
IceCold's user avatar
  • 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 …
IceCold's user avatar
  • 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 …
IceCold's user avatar
  • 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. …
IceCold's user avatar
  • 834