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ArcticMyst Security by Avery

laser line motor help

Joined
Oct 24, 2009
Messages
2,555
Points
48
yes another poly burshless motor driver thread.
LB1822 pdf, LB1822 description, LB1822 datasheets, LB1822 view ::: ALLDATASHEET :::
https://lh5.googleusercontent.com/-...AAAAAAAEU/sP7Q-PvSZE4/s800/20111109190055.jpg
20111109190055.jpg

so i have found the gnd and the vcc not hard.
But what type of signal do i need to make it run.
i tried using my lathe to make an adapter for another motor but it had a tiny bit of wobble and made a few lines so i wanted to use this if possible.
 





Joined
Oct 24, 2009
Messages
2,555
Points
48
on the white terminal pin with the right being number 1 and the left being 7
1 vcc
2 gnd
3 x'tal
4 gnd
5 vcc
6 LD
7 vm
 
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Joined
May 4, 2009
Messages
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pin #3 would be your PWM input, you need to put a pulsed signal in there, between pin #2 and #3.
I have no idea what pulse you need so build a variable pulsed output generator on a bread board to
feed it with, once you know what you need make it small ;)
 
Last edited:
Joined
Feb 1, 2008
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Here's a simple PWM circuit you could use:

SimplePWM.jpg


The voltage divider on U1's + input sets the output voltage, and R3 sets the oscillation frequency. Choose something around ~1.2kHz

You can use a single LM1458 with a supply voltage of +-12V to make this simple. Turn the pot to adjust pulse width, and feed the output of U2 into the third pin from the right on the motor PCB.
 
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