servo motor resets 16f877a

[aratti]

Find enclose the schematic. You should separate the supply of the pic from the supply of the servo to avoid the electrical noise generated by the servo will disturb the functionality of your pic. Remember that 4N35 can supply a maximum current of 50 mA so if you want to use the schematic as it is, you must check that your servo does not need higher current. Naturally you do not need to change the software, because the wiring will give you a direct interfacing.

Hope this will solve your problem.

[burak450]

Forgive me i asked too many questions but i am a rookie about pic.my servo motor has three cable.+5 volt,ground and i have another cable as signal cable.Where do I connect signal cable??? Thank for your patience...

[Archangel]

Forgive me i asked too many questions but i am a rookie about pic.my servo motor has three cable.+5 volt,ground and i have another cable as signal cable.Where do I connect signal cable??? Thank for your patience...

. . . . . If using the opto . . then to that . . . otherwise to the pic . . . . Why use the optoisolator . . .are you using some dangerous voltage, somewhere ? Or just trying to keep servo isolated from pic?

[burak450]

I am just trying to keep servo isolated from pic.my question is that where should I connect orange cable?

[skimask]

I am just trying to keep servo isolated from pic.

You really shouldn't NEED to isolate your servo from your PIC as long as you have a well designed circuit to drive it. I've used servos with my PICs, never had a need to isolate them, ran them off the same battery pack, same wires, etc.etc.etc.
If you're trying to run a PIC and a servo off a 9v battery (the little rectangular ones) connected to a single 7805 type regulator without any sort of cap's in the circuit anywhere, well, then, yes, you will most likely have a problem.

Maybe if we saw your schematic, we could help you figure out a way to avoid the isolator altogether...
Maybe you forgot to put a pullup on MCLR...maybe your oscillator setup is a bit goofy...maybe you got peanut butter in your chocolate... Who knows...

[Acetronics2]

Hi, Burak

THIS could be a geat help :

http://www.parallax.com/Portals/0/Do...ic/Signals.pdf

Alain

[burak450]

I am trying to design an object tracker (only left and right) and I am using phototransistors by using two analog inputs.I have to explain my problem more clear.When I turn power on servo tracks object but after a while sometimes pic resets itself or servo motor suddenly stops.I hope
I explained it clearly.What do you suggest? Here is my design.When you see the design there is a lcd.I use it for watching the values of analog input.When servo rotates,brightness of lcd changes (getting brighter or darker)...I think thats another weird thing...