Need hardware advice: ULN2003A

[Christopher4187]

So, here is what I am thinking. If the field is 77mA and it is ganged together with three outputs, it is esentially like switching a coil current of approximately 26mA and the collapsing field has three different paths to go. This is below the 50mA that Melanie said she has used before. Is my thinking correct?

Thanks,

Chris

[sayzer]

Your thinking is "technically" correct of course.

Practically it "should" be correct. Since Melanie has a practical experience, so I say go for it.

[mister_e]

if you only use 2 driver... why not using SOT transistors/Mosfet instead?

[Christopher4187]

I am a creature of habit. If I have used an IC that I know works well and I have not had no problems with it, I will use it in future designs.

[sayzer]

Chris,

What you say is similar to having a PIC in a circuit in which the same job can be done very easily with two-three transistors etc.

So that using PICs has become an addiction. Just as you use one chip instead of two Transistors.

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[mister_e]

Sure, sometimes i use some 10F to replace those 'old timer' 555, some 12F as crystal clock generator (when a simple gate would work), etc etc, etc. Internal comparator are just so usefull too.

I agree, they're addictive once you know exactly what you can do with...Also so useful when you need to reduce board space or reduce the experiment/developpement time.. well i guess.

LMAO! We all losing some old electronic basics...or changing the eay to design stuff. One thing is great... if the unit become faulty, we're the only one (or close to) who can fix it without hardware modifications

Is anyone else have this... "if i want to do that... i'll use a PIC for sure" saying?

[Christopher4187]

I use PIC's for EVERYTHNING!!

Anyhow, can anyone confirm my thinking for the use of a ULN2003A with more outputs to spread the flyback voltage?