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Results tagged with led
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user 83541
An LED is a light-emitting diode. Lighting an LED is considered the "Hello world" of a circuit design, and it can be as simple as using a series resistor, or it can get more complicated, involving PWM and multiplexing.
3
votes
Accepted
control multiple leds using only 2 connection wires
You could send an analogue signal over the two wires to power and signal an LM3914 Dot/Bar Display Driver.
https://www.sparkfun.com/products/12694
- 4,050
5
votes
Accepted
Switch between 3 states?
No LED on output 0, LED 1 on output 1, LED 2 on output 2 and reset connected to output 3.
You could base it on the first circuit here - http://www.clarvis.co.uk/version2/4017.html …
- 4,050
26
votes
Accepted
What's causing my microcontroller LED program to stop working?
I would have thought that you would need a loop around your code -
while(1)
{
if (ip == 1){
op = 0;
wait (1.0);
op = 1;}
else {
op = 1;}
}
Before you have chan …
- 4,050
1
vote
After adding a power switch onto a LED string of lights, some still light up very slightly w...
While this doesn't answer why this is happening, you could wire your switch like this to stop the LEDs illuminating when switched off.
simulate this circuit – Schematic created using CircuitLab …
- 4,050
3
votes
Accepted
Is this PIC micro-controller powerful enough to drive PWM LEDs?
Looking at the datasheet for that device, you would need to use the output compare function to control the PWM. However it looks like you wont be able to set 16 individual PWM periods, therefor this …
- 4,050
1
vote
Using a 5A power supply for an LED Strip rated for 3A per color
If each colour needs 2A and you have 3 colours, then ideally you need a 6A power supply for full brightness at all times. A 10A power supply of the same voltage wont make them any brighter.
- 4,050
0
votes
Accepted
LED Cube - Drain Current Resistor for MOSFET Switch
You would need to put a resistor per LED on the cathode side. …
- 4,050
4
votes
Digitally detect blinking LED
You could replace the LED with an Opto-Isolator.
The appliance would still be driving an LED and your circuit would be electrically isolated from the appliance. …
- 4,050
2
votes
Accepted
CD4017 Decade Counter Based LED Flasher Question
You can't connect 2 outputs together. When 1 output is high, the other will be pulling it low. This will explain why you are getting a low voltage on the outputs. You could use 2 diodes to connect …
- 4,050
1
vote
Accepted
3 to 8 line Decoder not switching off LEDs
You haven't got any of your enable pins connected.
You should have pull downs on your inputs.
- 4,050
1
vote
Accepted
Use one 12V 30A timer for two separate 12V inputs?
If it really is capable of switching 30A DC, then you can connect both LED strips in parallel to the 'LOAD' connection. … Or you could use the timer to power one LED strip and also control a single pole relay which switched the second power supply to the second LED strip. …
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