Have you ever experienced a malfunctioning device without the slightest idea as to what the issue might be? Typically, this issue is due to a blown fuse. This basic circuit published at https://www.facebook.com/share/p/1Gi4UZHpVh/ claims to be able to serve as an instantaneous way for you to detect whether it is in fact due to a →
I saw this viral circuit in Facebook https://www.facebook.com/share/p/1EEBkqkNr3/ It is a working concept but bad viral implementation: That 100 ohm resistor will heat up and consume the battery quite quickly. The 100 ohms resistor is so low value that it can potentially damage the transistor because maximum allowed transistor base current is exceeded when alarm →
I saw this circuit in facebook at https://www.facebook.com/share/p/1FF5z48oYV/. The screen capture is included here under fair use (commentary and critique). The good thing is that this is a simple circuit, but the disadvantage is that there is NO sound out with this design. – there is a battery drawn without clear indication of the operating →
In what country this is the recommended practice? Picture source: Facebook https://www.facebook.com/share/p/1DrRjhJH2r/ I have been reached that If you should not use a knot for cable strain relief. ⚠️ Important: If this is a 230 V / mains-powered device, proper mechanical strain relief is mandatory for safety and compliance. A knot is not a safe →
I saw this circuit seen on Facebook at https://www.facebook.com/share/r/1GAqZQWc7y/ In this circuit design the soil acts as a simple moisture sensor by changing electrical resistance with water content, forming a basic circuit with two probes (wires) connected to transistor and indicator LED. Water conducts electricity better than dry soil. When water fills the gaps between →
To scientifically analyze the difference between audio interconnects (such as copper vs. silver, or different types of insulation or shielding), you need to approach it from both a measurements standpoint and a listening tests perspective. Here’s a structured approach you can take: 1 1. Objective Measurements: The first step is to use measurement equipment to →
I saw this circuit at Facebook at https://www.facebook.com/share/p/1AC9zDA8gR/ I hv been seeing circuits like this i will be wondering what a hell are they publishing like this without shame ! Dangerous, do not use ! This is what I call an “automatic house ingnitor circuit” Lithium battery exploder circuit That looks like a one way →
Another bad and potentially dangerous circuit from Facebook. This is supposed to charge LiIon battery from USB power. Identified problems: – no current limiting – can overcharge the battery – red charging LED will be always on when there is USB power coming in – green charged LED will not turn on when battery is →
https://www.facebook.com/share/r/1MqEUa6oyN/ A bad design that for most control range LEDs are off, then there is some brightness control and then turn a little bit more and you have your LEDs fried. Trying to control LED brightness without series resistor by adjusting voltage going to then is a bad design. The LM317 should have been configured →