robotmaker
I design alot of circuils been electronic engineer and was look at are using using switching transistors to turn on lights ,relays and more
Transistors are mostly old school design ,before mosfets came out,if you look at the h-bridges now that use mostfets instead of transisors
For a few reasons one is low RDS on ,with meens they can handle higher wattage and not get hot using transistors ,plus less voltage
The most common is n-channel and have 3 pins ,GATE witch goes to digital output with a current drive resistor then SOURCE witch is the load and DRAIN is ground
Now for protection for mosfets most have a diode that protect it from EMF or inductive kickback
MOST i see use diode on transistors from collector to emitter ,NOT a good idea manly it does suppress or stop the inductive kickback and if using a microprocessor or circuits with will get resets and more induce in th system
so where the diode goes is always across the coil with cathode (black line ) to postive and NO inductive kickback
DIODES are only needed for inductive loads ,motors and relays or coils
Not for resistance loads ,lights or heaters ,leds will put up a simple circuit
second part will be how to control AC products,RELAYS are also not good slow switching and as noises on the contacts that does resets but wull give info on how to fix them
HOPE this is easy to understand if not just ask a question
so thats why you dont know very much,except for coding and software
Wow... Going down the route of attempting to insult and belittle now are you? Thought you said you were always nice and never nasty to anyone? That post says otherwise with a blatant insult like that which is not only untrue but also uncalled for especially considering I'm attempting to be civil with you. Or will that post get edited shortly when you realise I wont be dragged down it? (edited it is then)
P.S. It's spelled "wonder" and don't has an apostrophe in it.
RICH college doesnt cost much ,may be a better poaying job would help. for it was a easy cost and i really enjoy college
MY next answer to this post unless somebody has a good thing to say and not finding a faults with another person .like one missed spelled word.
With photos of my design and circuit in about 8 days from now .
YOU said you dindt get A'S i school in reading and writing i didnt too.mostly C+ or B once in while mostly because i didnt like to read ,but after college i really like reading stuff alot on electronics.
I have big library full of electronic books that i read alot
to much garbage on this post and keeps others from find good proven info on my design.
So after 8 days we re-post the info all over again.most likely copy and paste
ALSO very rare do you see others say anything wrong with my designs or make any comments and most are really good in electronics
Read this slowly... When have I said there is anything wrong with any of your designs? And it's your garbage, I tried making conversation and you turn around with an insult (that's been edited now but we both know what you wrote). I ignored you for a while so you didn't frustrate me, I tried being civil but still you continue to bang on with triple posts of useless crap. I refuse to fill the forums with this crap.
I didnt say the garbage came from you ,its all the info that has nothing to do with the post
yes i did re-edit it to be a little better like you told me to
parts list R1 -1K RESISTOR D1 - 1N4004 DIODE DIGI-KEY PART # 1N4004-E3/54GITR-ND Q1 -IRFU110 DIGI-KEY PART #IRFU110PBF-NDNOTES D1 is only needed for inductive loads like relays and motors Also most any mosfet will do,only i pick this one because it matches TIP120 darlington and a smaller size LINKS and prices
IRFU110 MOSFET $.88 EACH
IN4004 DIODE $.029 EACH
Will make the board when i get back