12V Battery Level Indicator Circuit

Look! Awesome 12V battery discharging device!

Battery has to overcome LED threshold voltage to turn it on; for red it's about 1.8V to 2V, for green its about 3V the other colours are in between, so battery has to overcome all 4 threshold voltages added up in series (about 10V or so) to turn them all on, which shows battery is almost 100%.

I really don’t like lazy engagement farming AI. The value of the resistors would be ~1k for 12vdc but don’t expect this circuit to work well.

LOL

That's not a level indicator. If there's a potential difference drop, all LEDs will have an equal loss of brightness.

Suitable value for 12V DCPower -> 1.0〜1.5K ohm I think.

Wrong!

Technically the long leads on the green, yellow, and orange are not connected, there is no dot indicating the junctions. So only the red has a complete circuit.

Calibration would be tricky, but in principle the orange LED lights when the voltage drop across the red LED’s resistor exceeds its forward-voltage threshold, same for the yellow vs. orange resistor, etc. So there is a real stepping function; just don’t expect it to work cleanly or reliably.

Simple and cool 12V battery indicator Easy way to check battery level. Great video

Just what I needed. Thaanks

16 solder joints, voltmeter 2.

Check the connections bro. It’s completely wrong 😑. Delete this 💩

Res. Value?

All of them will lit at once wont work as battery level indicator, At least increase the resistor values after the red one.

@Riddhi1450 Informative

This is way better

pretty simple

なんか変 ＋ーがとどいていない？

Eso parece que no funciona

Of course a meter works too

Very nice kind of video.

using a simple voltage divider circuit to measure a battery. We humans are so clever.

Nice

I vaguely get it, I haven't designed a circuit in years so I don't remember too much and I definitely don't remember the color codes for resistors but I kinda get it. With each LED you step down the power via a resistor on the negative electrode.

Als de spanning van zo'n loodaccu onder de 11V komt dan is de accu schoonleeg. Dom schema dus.

🙂

Podría decirme si la conexión es meramente ilustrativa ó quiere desencadenar un debate ??

It's inexpensive, but it's cheap.

What the hell is this crap!!!

Yeahhhhhh....nooooooo......