Yes, this one is fake and non-functional too.
If you wire an LM317 exactly like this, it will not regulate voltage, and you won't get any usable power at the output. Here are the fatal flaws:
1. The Output is Tapped from the Wrong Place
The regulated voltage from an LM317 is supposed to come directly out of the OUT pin (the middle pin).
In this diagram, the green wire from the OUT pin completely bypasses the output terminals and just loops through a resistor straight into the negative/ground line.
Meanwhile, the actual "Output" positive wire (red) is connected to Pin 1 of the potentiometer. A potentiometer cannot deliver load current like this; you are essentially trying to power your device through the adjustment pin.
2. The Feedback Resistor is Grounded
For an LM317 to work, it needs a precise feedback loop. A fixed resistor (usually around 240Ω, close to the 200Ω shown here) must be placed directly between the OUT pin and the ADJ pin.
In this graphic, the resistor is instead connected between OUT and Ground. This completely breaks the internal reference voltage mechanism of the IC.
3. The "1V to 12V" Claim is Physically Impossible
The diagram states that with a 12V DC input, you can get a 1V to 12V output.
The LM317 is a linear regulator and suffers from dropout voltage. It requires the input voltage to be at least 1.5V to 2V higher than the desired output voltage.
If you feed it 12V , the absolute maximum voltage you could ever get out of a correctly wired LM317 is around 10V to 10.5V . It can never reach 12V .
How the Real Circuit Should Look
To make a real LM317 adjustable regulator:
1. The IN pin takes the positive input.
2. The 200Ω resistor goes directly between OUT and ADJ.
3. The ADJ pin connects to the middle pin (wiper) of the potentiometer.
4. One of the outer pins of the potentiometer goes to Ground.
5. Your Output Positive is taken straight from the OUT pin, and your Output Output Negative connects to Ground.
2026-07-13 13:26:09
0
To see more videos from user @electronik650, please go to the Tikwm
homepage.