Mousebot Revisited

Step 7 Build mousebots brain

Mousebots brain is the LM386, flip it on its back (pins up) and bend pins 1 and 8 so that they are touching and add some solder.

Now place the 386 into position and connect pin 4 to the - rail, pin 6 to the + rail and add stranded wire to pins 2, 3 and 5.

We are almost ready to connect the motors so solder some stranded wire to pins 4 and 13 of the relay. At this point your Mousebot should look something like the third picture on this page.

Comments

[black9820]

Where shall i get LM386 in India Please suggest for it

[gunner2000]

sp road in bangalore

[christinb]

I found through some testing that putting a resistor across the gain (Pins 1 and 8) of the OpAmp chip (LM386) rather than just soldering them together gave me better results. Every robot will be a little different because we're all using different IR emitters or IR LEDs in our bots.


You can read about my experiments and how I determined that a 200 Ohm resistor resulted in my mouse moving in the straightest line on my blog.

http://robotfun.wordpress.com

-Christin Boyd

[jwoo2023]

how do you know which pin is 8 and 1?

[nsaripalli]

it is on one of the pictures

[jwoo2023]

is there a mark?

[jaketheman987]

I'll explain it a little easier. You should see a notch, hole, bore, or whatever a noticeable mark is called. If you lay it on a table with the notch looking up, and pointed straight ahead. top left =1 then going down its 2,3,4,then the bottom of the right side is 5, then going up its 6,7,8

[brad turd]

A little imprinted dot on the top of the ic indicates pin one. It counts counterclockwise when you see the ic from the top. Pin eight is the last one on the opposite side of pin one as you see on the photo. Some ics have a notch on one narrow side, counting starts left of it. -

[magiccowy]

hi im building this at the moment i have the LM 386 but dont know which pins are which could you please help me

[prabhu59appu]

i need the complte documents about mouse bolt revised

please send to me

WBR - prabhu

[galchenko]

cool

[XylophonicMonkey]

Any chance I could substitute the LM386 with anything else?

[carl shelton]

you can a LM386 in some old answering machaines