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A breadboard sketch would look like this: Notify me of new posts via email. Notify me of new comments via email. Email required Address never made public. From my first drawing things looked way too complicated, but after tansistor up a bit about DC motor control through H-bridge NPN and PNP transistor configurations I noticed they did exactly the same thing in this circuit.

2SCL Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

The two horizontal resistors central in the picture are the motors M1 and M2. To find out more, including how to control cookies, see trqnsistor Skip to content Home About.

The car has no wheel that can turn so the only way of making corners is by having different speed on the wheels for each side. Also note in the above schematic the potentiometer on top which allows one to correct the differences in motors speed as one motor will never be exactly the same as the other one.

The car architecture is as following: The transistors were rated good enough for the old circuit so they should be good enough now too. From my measurements I found the motor control circuit to look something like this: A breadboard sketch would look like this:.


You are commenting using your Facebook account. You are commenting using your Twitter account. Though it did not hold me back to start measuring around and understanding what kind of voltage and current levels are involved in driving the motors, because when you get that there is not much more holding you back from throwing in an Arduino or Raspberry Pi for example to do the rest of the task.

While Q6 and Q8 handle the current for their motor only, the current comes together at returns leads from each motor and is than flowing into Q10 which should so be able to handle both currents together. You are commenting using your WordPress.

What is so different here to most schematics is that 2 motors are driven from the same circuit. For each pin I first had 22k resistors connected to the transistor base but later I swapped these to 1k resistors as the transistors that I have never came to conduct.

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I however soldered mine because my breadboard is still in use for some c32779 project. As far as 1 goes, that is something I cc3279 handle in software Arduino. Because of the remote control missing I had to reverse engineer the current circuit board inside the car.

If the left wheels are turning slower than those on the right, the car will turn left. Unfortunately, the toy is like 30 years old and so off course the toy is based upon analogic components instead of digital ones, and off course with the datasheets of some components are missing.


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So far example, if you want to drive transistof one should make Q6 and Q8 conducting and also Q10 in the middle. So no fun, unless… And so I decided to revive this toy, not because I like RC cars that much, just because off having something to do during the day-hours of the festival and to recover from parties the day before.

But then I stumbled upon one of my first electronic kid toys ever, a Raccoon RC car that was in really bad condition. Leave a Reply Cancel reply Enter your comment here By continuing to use this website, you agree to their use. Note that in the image above the transistor has the base as the center pin. This site uses cookies.

Fill in your details below or click an icon to log in: But the above on is also working, but you must keep in mind two things: