All Questions
8 questions
0
votes
1
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393
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The reason behind LEDS getting dim (Water level indicator using ULN 2003) [closed]
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Whenever I switch on the circuit, the LEDs glow fully for a second and gets off. After 2-3 seconds they start glowing slowly.
What might be the reason for the above?
- 1
0
votes
2
answers
151
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Turn off LED when submerged in water
I want to do a simple project where an LED turns off when it is submerged in water.
I thought this would be simple because when you short the two leads of an LED with wire, it just shorts the power ...
-1
votes
6
answers
459
views
Water level indicator LEDs one by one
I want to make a water level indicator but, instead of all LEDs lighting at 100% (for example) I want the top one only to light and the rest turn off
at 0% all LEDs off
at 25% the first LED on
at 50% ...
- 55
2
votes
0
answers
26
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Ho can I light number of LEDs based on current flowing through circuit [closed]
I am trying to create a water tank level indicator which will have 2 wires going into tank one with resistors attached at increment levels and one simple wire. Is it possible to light up number of ...
- 21
0
votes
1
answer
92
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Doubts in providing power to an LED
I am making a project on water level indicator. I've completed the circuit like this:
The circuit is closed through the water.
The problem is even before switching on the circuit, and with terminals ...
2
votes
0
answers
72
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Need a simple buzzer/LED circuit for espresso machine [duplicate]
I have an espresso machine that I tore down, reassembled with fewer components then modified it to fit a specific setup -- kind of DIY project.
The machine has an autofill circuit. After I removed ...
- 21
0
votes
1
answer
3k
views
Buzzer is not working
I am extremely new to electronics and stuff, I was trying to design a water level indicator.
In Proteus, all the LED indications are working perfectly, but for some reason my buzzer won't work.
- 129
3
votes
3
answers
1k
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Turn on LED when an electrode or contact is submerged in saltwater
this is my first post here, thanks in advance for any help you can render. I am working on a project that turns on one 5mm white LED running on a 3.7v lipo battery when it comes in contact with ...
- 31