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small help for my pic project please

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wejos

Member
My problem is, aside from I'm new to electronics, I also live in the remote part of the Philippines, where electronic parts are really scarce. How remote? very very remote. Out in the woods :eek: Now, I bought this replacement part because the other one is not available, but I'm not sure if I should use it.

Here's the schematic diagram:

6745-pc-servo2.gif


Here's what I think I should have bought (4 MHz ceramic resonator):



And here's what they only have (labeled 4.000 MHz):




The pins were different. The one I bought only has 2 pins when it should have 3.

Is it okay to use this? and do these pins have polarity? should I just ignore the GND connection?

And one last final thing. What does VCC there mean? does it mean +6v?


Thanks a lot in advance
 

blueroomelectronics

Well-Known Member
It's hard to tell but it looks like a 2 pin resonator. Should be fine but you'll need to add a couple of 33pf caps one from each leg to ground

VCC is 5v, 4 AA NiMH will be about 5v when fully charged.
 

wejos

Member
It's hard to tell but it looks like a 2 pin resonator. Should be fine but you'll need to add a couple of 33pf caps one from each leg to ground

VCC is 5v, 4 AA NiMH will be about 5v when fully charged.

Rechargeable batteries?

I have a Cannon AC-DC adaptor, 3-12v 500ma

It has 4.5 and 6 volts selection

Which one should I use?

Thank you very much for your help. I'll buy those 33 pf tomorrow :D
 

wejos

Member
4.5V should be fine, but you'll need more than 500ma if you plan on running more than a couple of servo motors.

Okay thanks.

i'm just trying light up some LED and switch one or two 12v relay.

You were really a BIG help. Thanks again man.

I'm a newbie :D

Very interesting stuff here
 
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