Can you Identify these 3 parts?

[Propjob81]

http://www.home.earthlink.net/~sbumg/images/Parts.jpg

I'm trying to learn electronics without taking classes more classes than I already have, so without much criticism could someone identify these parts for me? These parts are part of a circuit for making an ESC. The schematics will be posted below.

The parts I know are
1. International Rectifiers Sot-8 MOSFET
2. PIC12C509A
3. ??? (diode?)
4. ??? (some kind of cap?)
5. .01uf caps.
6. ??? (some kind of Voltage regulator?)


Thanks,
Matt

[Propjob81]

http://www.home.earthlink.net/~sbumg/images/sch%20ESC.jpg

[Bob Baker]

#3, LM1117-5.0, voltage regulator

#6, 1SS349, 1A schottky diode

[raytor]

You got most right and a couple mixed up.
#4 is the 33uf electrolytic, then one with the + sign.
#3 is the voltage reg. LM1117 - google search for it's spec sheet to see the pin out, it's a little tricky (the big tab is your Vout).
#6 is the Shottky diode ISS349 - again you need to get the spec sheet on it to hook it up right, even more tricky.
I would not suggest you try to build your own ESC for a valuable R/C if you can't identify these parts. There is a lot more to making it work right and safely than just soldering wires, espcially proper heat dissipation. But if you want to learn electronics, build it and play with it on the bench.

[DesertDawg]

#4 6V 33uf tantalum cap (between pin 1 of the 12C509 chip and GND)

#5 Schottky diode (across the "motor out" leads)



Dawg

[raytor]

#5 Schottky diode (across the "motor out" leads)



Dawg



Sorry that is not correct!

[Propjob81]

Thanks for the help! I already have purchased ESC's for the planes I value...
I have recently been turned on to electronics (specifically surface mount), but my main study is aeronautics and it would be difficult for me to go to school for both and
still have time for fun. I appreciate it when people are willing to help out.

raytor: There is a lot more to making it work right and safely than just soldering wires, espcially proper heat dissipation. But if you want to learn electronics, build it and play with it on the bench.

I have already come to this understanding. In reading data sheets for various parts on the IR RX I have already learned alot about this. I have also learned from experience that improper soldering technique will fry components quicker than anything. Right now that's what it's all about for me... Experience and Learning.

Thanks,
Matt

[Propjob81]

And that conlude this Thread...

Thanks again,
Matt

[micromicro]

#4 Tantalium capacitor 6Volt 33uF it is required at output of a voltage regulator for stable operation
#5 is MLC (multi layer chip) 0.1uF capacitors one across motor other across pin 1 & 8 of PIC. Its always good to use one across input pins of a PIC
#6 schotty diode required against Back emf of the motor but may not be used if one is present in the mosfet itself.

[Texy]

Of course you do realise that the PIC will need programming, assuming
you are trying to build a working example?

Texy

[Comatose]

MicroMicro, leaving off the scottkey is NOT correct. There is a diode inside the mosfet. That protects the mosfet from inductive voltages less than Vsource (0v). The external diode protects the mosfet from voltages greater than the battery voltage. Where do these voltrages come from? Well, the motor is basically just one big inductor.

You can leave the shottky diode off if the ESC has a high side mosfet (a la brake) because then the internal diode of the high side transistor protects the pair from voltages above Vbatt. That isn't the case here.

[Propjob81]

Thanks for the added info.
Yes, I am aware that the PIC needs programming. I have already programmed a few PIC's successfully and I have already build and ESC for a Bit plane that works properly. I am not totally ignorant to this stuff. I just needed a little help identifying a coupld parts.


Matt