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Step 8Preparing to Make the Controller Circuit
Step 1: Know what everything does - the relays ,Phidgets interface, and the batteries
Before we actually start making the relay motor controller circuit let's examine what a relay is and how it works.
Read the HowStuffWorks Article on Relays.
You should now understand that a relay is an electromagnet and a switch, and when the electromagnet has electricity running through it the switch closes, but otherwise the switch is open. The switch in our relay will turn on or turn off a motor. You need 4 relays to make a motor be able to go forwards and reverse. If you want to understand how that works have a look at this page.
The electromagnet will be turned on by a neat piece of hardware called a Phidgets Interface Kit. That is the hardware that will interface the computer to the relays. The interface board consists of 16 inputs and 16 outputs. Right now we are interested in the digital outputs. The outputs are just digital switches that switch to ground.
In the diagram attached you can see that between points 85 and 86 there is the electromagnet which pulls the switch between 87 and 30 using its magnetic pull.
Before we actually start making the relay motor controller circuit let's examine what a relay is and how it works.
Read the HowStuffWorks Article on Relays.
You should now understand that a relay is an electromagnet and a switch, and when the electromagnet has electricity running through it the switch closes, but otherwise the switch is open. The switch in our relay will turn on or turn off a motor. You need 4 relays to make a motor be able to go forwards and reverse. If you want to understand how that works have a look at this page.
The electromagnet will be turned on by a neat piece of hardware called a Phidgets Interface Kit. That is the hardware that will interface the computer to the relays. The interface board consists of 16 inputs and 16 outputs. Right now we are interested in the digital outputs. The outputs are just digital switches that switch to ground.
In the diagram attached you can see that between points 85 and 86 there is the electromagnet which pulls the switch between 87 and 30 using its magnetic pull.
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