All Questions
72
questions
0
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0
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85
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Trying to power a 12 V LED underglow system using PWM signal from dome light
I've learned a lot from the brilliant minds on this forum so far, and I think I've narrowed my original question a bit.
I'm trying to create an entry light effect in my car using my LED underglow ...
- 51
3
votes
1
answer
340
views
12v LED lights powered by 2 different circuits
I am wiring some automotive LED lights (underglow), and currently have them wired from the 12v ACC power (on when ignition is on), with a 5-pin illuminated on/off rocker switch on the dash. It works ...
- 51
1
vote
4
answers
134
views
Controlling one relay with three LEDs - energize relay if any one of the three LEDs are lit
I have three 12V indicator LEDs which are the simplest way to see if one of the three circuits is 'ON'.
Only ONE of the LEDs can be ON at any given time. They all share GND and a controller sends POS ...
- 113
0
votes
0
answers
69
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Converting vehicle instrument cluster lights to LEDs: one light stays on
I have a 1998 K1500 (GMT-400) and I would like to convert the lighting in the instrument cluster to LEDs. There is a semi-known issue with this type of vehicle, where if an LED light is used for the ...
- 103
-2
votes
2
answers
4k
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Can I run a 6V lamp on 12V without damage? [closed]
I am modifying LED headlamps and the LED chips inside says 6V and 2W. However. It came with a pack of two 18650 batteries so it gets 8.4V max when they're full and 7.2 when those are going empty. So ...
- 31
3
votes
2
answers
2k
views
Making 12 V lights fade in using Raspberry Pi Pico PWM
I have 4 small LED lights (raptor lights for a RAV4 grille) for my vehicle and I thought it would be cool if when I start my car, the outer lights would fade in, and then the inner lights would fade ...
- 131
2
votes
2
answers
600
views
LED with built-in resistor and voltage drop
I accidentally bought 12 V LEDs, so an LED with a built-in resistor (you can see it as a black dot on the anode).
Now I measured the voltage and get after the LED still a voltage of 11.3 V, when the ...
- 129
1
vote
2
answers
237
views
MOSFET started to smoke when switching a 12V bulb - how can I troubleshoot the cause?
This is the case: 12V bench power supply (current limited to 3A) wired to a 30W LED bulb (H7 bulb for vehicles), controlled by an Arduino via the gate of the 2SK1363.
The signal from the Arduino was ...
- 53
0
votes
1
answer
259
views
Wiring two separate circuits with separate loads (one with mosfet and Arduino) with a single bench PSU
I have a cheapo bench PSU with one pair of terminals on it and I am trying to wire the pictured circuit correctly and in best possible practice. As my description on the schematic says, one LED device ...
- 53
1
vote
4
answers
387
views
12V LED radial wiring
How do I install the 12V equivalent of a radial/lighting circuit?
I am about to renovate a small 40m2 apartment.
I do not want to touch the existing 240VAC cabling at all.
I am looking to have ...
- 121
1
vote
2
answers
178
views
Problem controlling common cathode 12V RGB LED
I want to be able to control an RGB LED with common cathode and I've used the circuit below for each colour. For some reason there is 12V on the output all the time and I can't control the LED as it's ...
- 43
3
votes
1
answer
496
views
Automatic switches for a 12 V LED with two separate power sources
I am converting a Mercedes Benz Sprinter van into an RV. I have a 12 V LED dome light (actually several) that activate when a door is opened, powered by the vehicle's power system (battery/alternator) ...
- 31
1
vote
0
answers
168
views
How many Ah do I need for 12V battery to power 76 LED lights (0.84watt each) using a 500W inverter to power for 6 hours?
Looking to build a power pack with a 12V battery to inverter in order to power 4 string lights totaling 76 LED bulbs each with 0.84 wattage. Total time to keep lights on is 6 hours. How many Ah do I ...
0
votes
0
answers
50
views
Device, Circuit, Component to Manipulate a Relay and an LED Light - Open to Any Ideas
This is my first post, and I am electronically illiterate - have mercy on me....
THE PROBLEM:
Dealing with an automotive +12V system - and I have a new voltmeter that I'd like to install. In addition ...
- 1
1
vote
1
answer
984
views
Running 4.5v LED string from 12v leisure battery [closed]
I have a string of 20 LEDs designed to run from 3x AA batteries in series.
I plan to hook these up to a 12v leisure battery.
Until recently I had always concentrated on getting the voltage right (...
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