So you are saying that the internet is wrong as are all of the people here who use the Darlington Transistor circuit for switching? It's the most popular method and searching the internet, here and any other forums which deal with switching from microprocessors all cover it and no other methods (or other methods are hidden very well).

Please provide clear descriptions with accurate part names, numbers and suppliers where possible. Also diagrams, schematics and photos. Using a spell checker and checking grammar in a tutorial wouldn't be a bad idea either. We know you dislike writing and are not in school but believe it or not, school isn't the only place you should use correct grammar and check your spelling. It makes it increasingly difficult to understand posts which are written poorly.

For an example of a well written and presented, easy to follow tutorial please refer to either the LiPo Balance Port Monitor or TIP Darlington Transistor Switching Circuit Tutorials.

Bear in mind people will be searching for this and they will not have the knowledge you have. They may not know what RDS is, what a MOSFET is, what n-channel means...

Having read that, I come out of it gaining very little other than the point that you are saying transistors are "old school" and shouldn't be used. Expand on it, give as much information as possible, include schematics, diagrams, part numbers etc.

DIDNT say the internet is wrong is old way of doing it,IT STILLS WORKS

Just not as good as a mosfet,a mostfet is improved design over a darlington transistor

this is just a start on it will explain what RDS is and more ,and there are way too many part # on mosfets

Mosfets are better because of low wattage something like using a 25watt darlington and 75 watt mosfet,no HEATSINK is needed on the mosfet at full power,switching is much faster

MOSFET is made up of 2 darlingtons

LOOK at the new designs on H-BRIDGES they use mosfets instead of darlingtons

Like i said soon as i get a chance will put up a schematic,hook up is still the same

A common TIP120 has a very large voltage drop across the collector to emitter witch you get higher heat dissipation

On a mosfet since its ultra low ohms NO large voltage drop and no heat

RICH ASK any electronic engineer witch is better and he will say the same

there are alot of internet info on transistors using as a switch,but look at the date it was done

HERE is a link on mosfets

all about mosfets

here is more info on schematics and how to use a mosfet

mosfet circuits

MOSFET is BETTER UPGRADE for darlington transistors

P-channel mosfet is for npn darlington and P-CHANNEL mosfet is for a PNP darlington

I just put the RDS info out there because some do know what it meens

But only important stuff is mostly heat dissipation,buy using a mosfet instead of a darlington you have less heat and low current drive and none is wasted like in a darlington

I design all my circuits to use very low current ,so a bigger battery is not needed or recharge alot or short robot run time

SAME on using LDO no power is wasted,look at the EZB,DJ changed from using regulator to LDO for same reason low drop out voltage

So it same with mosfets verses darlingtons low drop out voltage ,less heat and longer run time

RICH mostly your tutorials are only how to make the circuit and code to go with it

Doesnt saw much about the parts used and why,where in mine i put alot more info ,i am use to doing it since i am super good at designing circuits instead of just making them

i do a lot of reading on it,plus look at data sheets alot

will put a schematic up very soon,but first i wanted to put info up on a better switching design first

You must have missed the part numbers and links then... They are all on there where required. As are any relevant technical details that may be required and where and why any optional/additional components needed (see the additional diode section on the TIP tutorial).

My tutorials do not need to explain how something works. Details on all circuits can be found searching further on these forums and Google. My tutorials are detailed instructions on how to build the circuits and make a nice neat circuit which can be removed and reused should it be necessary. Should it be necessary for anyone to need to know the technical information they will ask and be answered.

I guess I was wrong to offer pointers on how to write a tutorial that's easy to read, you may use the advise given or disregard it. If you have a question on my tutorials please post in the correct topic.

I have nothing further to add to this therefore I shall not engage in conversation again other than to correct or amend any inaccuracies or to answer someone else should they have a question.

WHEN I PUT schematic it will have the part #'s ,it doesnt make sense to have part # without a circuit to go with it

YOUR are not wrong on pointers given,just its not same as mine tutorial yours mostly just circuit ,code and parts and photo on how it was put together

On mine i put the reasons why its better and more info about it,some info might be hard for most guys here and some is.

JUST mosfets are just a better design then darlingtons,both work

ON USING A DIODE look at the link mosfets circuits i have up

diode on the darlington it can be used in bost places just like on a mosfets

but it DOESNT STOP INDUCTIVE KICKBACK only protects the darlington

Thanks Rich for the nice write-up, switching transistors are well known, simple and very useful for hobby robot enthusiasts. Still we need very clear examples like yours so we can collaborate and continue building. Please keep up the technical writes, they are very valuable and they are what make this site fun and useful.