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The transistors will have a saturation voltage loss of about 0.4V from collector to emitter.
Why discuss the ridiculous circuit that has three power supply voltages??
Just use a single 5V supply and logic-level Mosfets.
Unless you provide the sums (or proof) how you arrive at "0.4 V", this is only an opinion. We all know that even the experts get it wrong, that's why we often ask for a 'second opinion' when there's not enough proven data.The transistors will have a saturation voltage loss of about 0.4V from collector to emitter.
Your opinion of the posted circuit aside, could you analyse the posted circuit any better than I had done? If you're able to, we're eagerly waiting.Why discuss the ridiculous circuit that has three power supply voltages??
Haven't we already covered that already?Just use a single 5V supply and logic-level Mosfets.
I didn't know that this project is school homework.
Our young people are the future of the planet, they inherit it from us after we've finished using it![]()
If you think you'll be unlucky, the FETs are only 20p each and the minimum order charge for Farnell is £30...
What exactly do you define as "turn on properly"? That's a bit vague.I doubt that you will find Mosfets that will turn on properly with a gate voltage as low as 3.3V.
The gate of a Mosfet has a high capacitance that takes a fairly high current to charge and discharge quickly. If they don't switch quickly then they fry or waste a lot of power making heat if the switching frequency is high.
BTW: do you want a link to a free schematic drawing program.![]()
So replacing the BJTs in my previous schematic with these FETs, it should work alright?
How much current would be required to drive the [MOS]FETs?
However, something about your circuit I like. I like the minimalism of it, and that it's so novel. Is it all your own work? I would like to see it work.
the BJTs should be replaced with logic-level MOSFETs
a resistor should be added to the uC circuit
will current actually flow through the gate at all?![]()
Try the AO6407 and AO6408.I doubt that you will find Mosfets that will turn on properly with a gate voltage as low as 3.3V.