All Questions
17
questions
0
votes
2
answers
76
views
What AC/DC adapter do I need to power 10 high-power (3W) LEDs?
I'm attempting to build a near-infrared (850 nm) lamp using high-power LEDs and am struggling to design a suitable way to power them directly from the AC power plug (220V).
I have 10 high-power LEDs ...
- 1
4
votes
1
answer
420
views
Help me make sense of this guitar amp relay circuit
Here is a channel-switching relay from a guitar amplifier. It is supplied with 6.3 V AC. Closing the switch (near center) operates the relay. It's on a schematic that's taped to my wall, and I started ...
- 443
1
vote
1
answer
434
views
Join two battery operated LED light strings
I have two 2 meter LED lights strings (lights are in plastic flower) that I would like to power using AC to DC universal adapter.
Currently the LED lights are powered by 2 AA Batteries with a switch ...
- 113
0
votes
1
answer
98
views
How to choose AC/DC adapter - high voltage low current vs low voltage high current
I got an LED light kit, 2 lights, each takes 60W, at 12-30V.
I'm planning to use these lights separately, and need to choose between:
12V, 5A adapter
24V, 2.5A adapter
Both will give me 60W, but ...
- 1
-1
votes
1
answer
89
views
What products can be used power LEDs from an wall outlet? [closed]
I am currently working on a project that will be a type of night light that plugs straight into a wall. What parts can I use to convert the wall outlet voltage into that which can be used by a couple ...
1
vote
3
answers
6k
views
Connecting led fairy lights together powered by ac mains
Iv a set of fairy lights, Rated Voltage 3v, 15mA, I would like to connect four sets together in series (12v 60ma).I can get uk ac/dc 12V 1A Power.
Question1 : Do i need to connect a resistor if so ...
- 11
0
votes
1
answer
96
views
Projects that require 2 power supply voltages (Raspberry Pi)
I'm looking for some help building a circuit to supply a Raspberry Pi Zero, as well as a 1W RGB LED driven through a Picobuck driver. The Picobuck needs 12V and the Pi Zero just needs 5V (from a USB ...
- 105
0
votes
3
answers
5k
views
LED Strip Light - Power supply issues
I'm making this right now - https://www.youtube.com/watch?v=qlMtakaa7u8
Each 5m roll of LED takes 60W power (http://www.ebay.com/itm/182028302443?rmvSB=true). He's using two of these rolls, so a ...
- 11
1
vote
2
answers
2k
views
Can I use a Triac dimmer circuit to control the brightness of an AC powered LED light strip? [closed]
I am using this Triac circuit to control the brightness of several incandescent lights. The circuit monitors the phase of the 120 volt wall current, then signals an Arduino when the phase crossed ...
- 565
0
votes
1
answer
265
views
Use 5w/3w 12vdc LED on 60w 12vac cdi ignition
I'm building a vintage two stroke race bike out of a 78' puch maxi. The original points setup is junk and I'm switching to a CDI.
I have an LED headlight that I'd love to use for aesthetic purposes.
...
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. ...
0
votes
1
answer
12k
views
5 pin push button switch with LED AC wiring question
Thank you in advance for any help you can give. This is really my first project like this. I built a shelf in my house based on this picture.
and I'm integrating an Eddison bulb lamp into the ...
0
votes
1
answer
316
views
AC DC adapter voltage regulation
I would like to make a dimmer for several ikea desktop LED lights. This one is plugged on a LED driver (adapter) with specifications:
Primary:220-240VAC 50/60Mhz, 0.06A
Secondary: constant current: DC ...
- 45
1
vote
2
answers
2k
views
LED blinking array using LC-circuit
Basically I want to create a blinking unit to drive my LED's. The LED's are used to be driven at a frequency of ~1.5Hz (that made me choose the values of L and C).
So here is my schematic. (I am ...
- 113
2
votes
3
answers
4k
views
Powering 28 LEDs in series by 220VAC - simple stabilizer
I have a home-made thingy that I would like to use as a lightning in my living room. It contains 7*4=28 LEDs (red, 1.86V, ...
- 338