Circuit Surgery Electronics

25/04/2026

Dangerous. Do not attempt to build such electronic circuits. There are so many problems and possible lethal connections. I took the liberty to use this picture, I cam accross. The electronic circuit will fail. Rather consult with a highly experienced person, or an Electronics engineer. Many people take so much time, making electronics and circuits to seem easy and fun. Don't try everything you see.

06/04/2026

DANGER!!! Please guys. Do not build any circuitry, found all over internet and some media groups, platforms, etc. I took the liberty to use this picture as an example to not even try. It is very dangerous, it WILL fail catastrophically and is a recipy for disaster, for people who wants to build and test Electronic devices and gadgets. There are countless Engineers and higly experienced people, ended up making similar mistakes, espesially for a quick "once off / turnkey" device. To start with, is the mains AC supply voltage is not isolated. The 4 diodes for the aparent bridge rectifier circuit is totally wrong. There is no voltage regulation and enough current control / protection. Having a close lookat the RED "DC out" + / Positive from the PC Board to the motor changes colour!!! The resistor Wattage and Ohm (Resistance) value is way out of it's ability to control basically anything. Should the 4 Diodes in the bridge rectifier be connected, with correct polarity, the Black Electrolytic capacitor WILL fail and explode. Thouching any part of the circuit and also the motor can be potentially fatal. Do not simply try experiments, without understanding it. That is te reason people need to study. Every person are skilled in different ways, and have their line of work and experience. Same as in all professions, like doctors, dentists, lawyers, chefs, builders, sales people, etc. I report such dangerous and misleading posts.

30/03/2026

Please. No disrespect to the creator / editor of this picture. I happened to see this in a post. Please consider LED's Anode / Cathode, first. Read the data sheets properly, although a simple L.E.D. (Light Emitting Diode), might have a confusing and boring datasheet, it is very important. The reason is, that products and tests, might fail, ending up, having catastrophic and dangerous results. The resistor value can easily be calculated, when taking technical data into account. Different colour LED's, have different "forward voltage drop". The more important and commonly, misunderstood factor is the (P.I.V.), which is an acronym for the Peak Inverse Voltage. Resistor values migh be similar, whilst using old standard "diffused - 5mm LED's". When higher wattage and voltage comes into the equasion, everything changes. An LED works on the ammount of current, flowing through it, not the voltage. Regardless the resistor value, limiting the current (Ampere) flowing through it, the "Reverse Voltage), "P.I.V - Peak Inverse Voltage), can and WILL destroy a simple LED. Should the calculations in the example picture be correct, it is highly dependant on correct polarity, having current flowing from the Anode end, through the Cathode end. Basically as from my point of view and explanation, same as the alphabet. A,B,C. In the same order. Anode, through the Body, and out the Cathode. A.C. (Alternating Current), creates a total different scenario. Depending on the sine-wave angle of current flow, the high PIV will damage the Diode part, inside the LED, having it fail, within a few milliseconds. Kindly ask, should I need to elaborate on this or make it a bit more visual. Safety first!!!

30/03/2026

Inverse square laws... Amazing.

08/01/2026

08/01/2026

It might be usefull to explain that the movement of current and flow of electrons is opposite to one another. It is easier to explain current flow, going through a diode, to just pass in the arrows direction. Anode to Cathode. Basically as ABC in alphabetical order. Current flows from Anode (A), through the body of the diode (B) and out the Cathode (C). Electron flow will confuse people. Current flow is easier to explain, especially for people who needs and wants to learn more. The sine wave / current changing direction at a frequency of between 50hz and 60hz, varies between continents, and countries, etc. in a transformers, whether stepup or stepdown, the cycle and amplitude causes a magnetic field to be created. When the cycle continues completing the other half of the sine wave, the magnetic field collapses and creates the opposite half of the sine wave, induced (magnetically), into the secondary winding. Please remeber that current flow is opposite than electron flow. This applies to all electronics and electricity laws.

15/06/2025

People are so fascinated by A.I. (Artificial Intelligence). Computers and electronic devices have no feelings and real emotions. Have you ever thought what would happen if an A.I. system gets upset?

04/05/2025

Good day. I would please like to as for any broken / damaged guitar. Acoustic or Electric. Need it for a school science project, about resonance and audible frequencies. Please Whatsapp me on 0715098382. Thanking you in advance.

23/04/2025

E=mc2
For interest sake. I have been thinking how to try and simplify the formula from Albert Einstein. One of Einstein's interesting and very important equations were E=mc2. To try make it simple, it basically means, that the heavier a person or an object is, the heavier it becomes... Look at it from this way:
E = Energy (Meaning "E" is Energy".
m = mass (as in weight per kilogram or pounds).
c = is just a name for speed of light (Speed of stationary light travels at roughly 300 000km/s or 300 000 kilometer per second).
do not be worried about the squared equation.
It simply means that, for example, "5 squared" (written as 5²) means 5 x 5 = 25. In this example, it simply means that 5kg as an example will be 5kg x 5kg =25kg.
To try put it simply, it means that there are 2 variables, in this case. Energy depends on speed and energy. To some, it might seem a bit abrupt but it boils down to a simple example... Lets say your wight is 50kg (just to be on the safe side 😄). It is clear, that if you should walk, run or push against something or an object, the Energy (E), will increase, the faster you move. To try put it more clear... The faster a person or an object of the same mass (50kg) is moving slower, or faster will cause the energy to have more of an impact, or less. The other variable is the speed as well. The heavier an object is, or more heavier of an object, the more Energy (E), there will be. Feel free to ask, should you have any further questions.