Hi John, I have been watching your channel for sometime now and your videos are the best in electronics and amplifiers that I have found. Your presentations are very professional and I have learned a lot from watching them, keep up the good work... Have a nice day....
I have trouble remembering things (even really simple things) so for me it's just easier to use the chart, then I can quickly find which formula I need. I have one of those on the computer and refer to it often when I need to.
Hello John. Unfortunately I am but a mere mortal and if I try and remember anything important 'my brain urts'. Being over 70 doesn't help of course. I am an engineer, I can remember the properties of maleable cast iron, etc., etc., from college 50 years ago but totally rely on a notebook now. That's if I can remember where I put my glasses and / or the notebook. Thanks for a very helpful video. Now where is the print screen button.
Hey JP, I can identify with you. I'm 63 and have similar issues! If I could make a suggestion: If you have MS Office, it includes a program called OneNote. It's like a software notebook and very flexible and easy to use. You can put all of your notes, screen-shots, links to videos, etc. in it easily and always find them. There are other free programs like Simplenote that work as well. Just google 'free alternatives to OneNote'. Oh, and if you want a screen-shot (in Windows), hold down the ctl and alt buttons and press the 'print screen' button. Then open any drawing program like paint or notebook program like OneNote and press ctl and then v. It's very handy!
The correct symbol for the electrical potential is U (from the Latin word "urgere" = to push). I is the first letter of the French word Intensité (Intensity). Indeed, the voltage "pushes" the current through the resistor. I find Ohm's law easy to remember because if you take a multimeter you literally measure a voltage OVER a resistance in order to get the current. Exactly as the formula describes.
Hello John, Do you have a PO box where viewer's could send you items. I thought in one of your videos you shared it. I've watched most of your videos but can't remember which video it was. Thanks for you commitment to you video audience. We really do appreciate all you do. Your videos are excellent. You don't ramble on about unnecessary subects. You are clear and concise. You always seem to answer the questions I have at some ponit in your videos. It's like you anticipate the questions I might have and answer them. Rodney
Hi John. I would like to encourage you to join Patreon or some similar funding method. I really appreciate your videos and what I learn from them and would like to support you in some small financial way. I know that other subscribers feel the same. You deserve funding for all of the time, effort and expense that you put into your videos! And we, your viewers, would truly like to support you so that you don't have to buy parts and equipment out of your own pocket. If each of your devoted viewers contributes just a little, you could buy the signal generator and components that you need. We know that you help your autistic brother and are a great person with a lot of expertise that you give freely. It's not begging. It's not a hand-out. You earned it! We get a lot out of your videos! WE WANT TO SUPPORT YOU!
John, there has been a recent discussion on Doug Demaro's channel about metal tapes, and the function of the auto/metal button on cassette players. Some believe that the auto/metal button enables the player to detect metal cassettes, while others believe that the button is an auto-bypass feature to ensure you are in metal mode. I wonder if you have one of these players, and you can confirm that the auto mode will switch to metal if detected and the indicator light will come on by swapping a standard tape with metal. This is the way I remember it.
I try and show the algebra way of rearranging the formula... but if someone isn't getting that I try the 2 EIR and PIE triangles you show on the right of the paper. I tell them if they want to find something then it's hidden... so they should first hide what they're looking for with their thumb... and what's left visible is the formula they should use to find it. e.g. if you want E cover the E with your thumb and you're left with P/I. Never tried the 'clock' on the left - seems a bit complicated and tbh I'd always just use algebra to work out the correct equation which would be less effort for me than remembering that.
when doing an ohm's law for volts, are the first 2 numbers of a long number the total, does the word "over" mean divide and when I put resistance and amperes I get a total of 880, did I do it right to get the volts?
Those are works for DC only...... In ac.. Their comes impedance... Inductance, capacitance.... & for power - reactive power(var) , aperant powe(va) , active power already in... (in watts)... 😉😉
Those work for all non frequency dependant components and circuts. And remember, this is basic formulas. Power is still based on them, but there is just a bit more to it. Think this video is meant for those who are new to electro related topics.
