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Step 3: The H-Bridge

This is the Snap Circuits Motor Control IC, or H-bridge. At the top of the figure you can see the electronic schematic of the Motor Control block. On the lower left you can see a picture of the block. The lower center shows the function of each snap for the block and on the lower right is a description of what each snap does. The H-bridge integrated circuit (IC) is easy to use by simply applying power to a particular pin also called "setting the pin high" to drive a motor in one direction. Cutting the power to that pin and applying power to another pin will drive the motor in the opposite direction. The circuitry inside the H-bridge ICs is somewhat complicated, so most folks will choose to use an H-bridge IC rather than building the circuit themselves. The Motor Control IC will also help prevent accidentally sending 9 volts from the Rover’s battery pack through the PICAXE and frying it.

Picture source: http://www.elenco.com/admin_data/pdffiles/SCROV10.pdf
<p>Hello,</p><p>We are having trouble getting our rover to upload the completed picaxe program. We have checked the COM number and have tried to upload with the rover both on and off. Are you available to chat this afternoon? It is for a tech fair project. Thank you!</p>
<p>Nice</p>
Cool instructable bro!!!!
nice, have you ever committed any of these snap circuit projects to a pcb?

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