Andy aka‭

Equivalent Circuit, 1:1 transformer Start by simplifying the circuit and change the transformer to a single inductor. This simplification ignores the benefits of isolation but, flyback converter t...

posted 3y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

Why are some PCB design software programs considered to be 'hobbyist' programs? Elitism and, folk with money to burn. I've used Altium, PADs, OrCad, Eagle and my current personal favourite is...

posted 2y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

The lifetime rating is (usually) quoted as "so many" hours at a certain temperature and that is the crucial thing to be aware of. For instance, consider a capacitor like this one: - Some in the ...

posted 3y ago by Andy aka‭  ·  edited 4mo ago by Lorenzo Donati‭

I need to design a simple flyback converter like this: - I want to control duty cycle from another circuit such as an MCU but, I'm unsure how to proceed. My requirements are: - Input voltage 125 ...

2 answers  ·  posted 3y ago by Andy aka‭  ·  last activity 2y ago by Andy aka‭

Which graph on the picture above better represents real-world use-case? They both represent real-world use cases. The impedance graph informs you how much ESL (effective series inductance) the...

posted 2y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

Why am I getting these downvotes? It started last week (or the week before) and now it seems like it's getting contagious: - Seems like this site has some of the same outrageous inclinations as ...

1 answer  ·  posted 2y ago by Andy aka‭  ·  last activity 2y ago by luap42‭

To add to Olin's excellent answer, if you were probing on a digital IO line in order to view a fast changing signal, without the local ground clip (or spring) grounded close to where you make the m...

posted 3y ago by Andy aka‭

Try this out for size: - Hope it's clear. Maybe a little simulation of 10 km 600 Ω line might help paint a better picture: - The voltage (V1) that feeds the t-line via the 100 Ω lamp is a 1 v...

posted 2y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

Embedding pictures is a pain in the ass. First you have to find the picture and save it locally then you have to drop it onto a special box before it can be processed. On SE, you just drag it to wh...

posted 2y ago by Andy aka‭

Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage Unfortunately not but, if instead of trying to send the complete pulse throu...

posted 1y ago by Andy aka‭  ·  edited 1y ago by Andy aka‭

A taper pad is a resistive attenuator that maintains impedances on both ports and provides a specific amount of gain-loss ($A_{12}$): - I have derived formulas for each resistor (that I know to ...

3 answers  ·  posted 1y ago by Andy aka‭  ·  last activity 3mo ago by Lorenzo Donati‭

I have recently finished designing a buck-boost converter for a job that uses a split (+/-) input power supply. Load power is taken equally from both positive and negative input supplies and, the ...

1 answer  ·  posted 1y ago by Andy aka‭  ·  edited 4mo ago by Lorenzo Donati‭

Since we are trying to keep the impedance matched to 50 ohms, what is the best strategy to approach this circuit? A low pass $\pi$ network seems a good route to go. Basically your $\pi$ networ...

posted 2y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

That fourth connection is the bulk/body/substrate connection: - Image from here. On a normal 3 terminal MOSFET the "body" is connected to the source. On your device, the 3 n-channel MOSFETs shar...

posted 1y ago by Andy aka‭  ·  edited 1y ago by Andy aka‭

Is the Thevenin's Theorem being applied incorrectly for the circuit ? It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2....

posted 1y ago by Andy aka‭  ·  edited 1y ago by Andy aka‭