witches allows us to control whether a particular circuit receives power or not. For this circuit we use two single pole double throw switches, some jumper cables, a LED, a 100 ohms resistor, and a power supply.
Both switches are set to allow current to flow, thus the LED lights up. Our next circuit uses a relay to switch from one LED to another.
Relays
Relays allows us to switch current from one circuit to another. For this circuit we need a double pull double throw relay, a single pull single throw momentary switch, two LEDs, a 680 ohms resistor, some jumper cables, and a 5 volt power supply.
Notice that only one of the LEDs are lit because the relay allows only one of them to receive power. If we hit the momentary switch, the relay will switch power over to the other LED. We can hear the relay make ratcheting noises as it switches current, which signals to us that this relay is working properly.
VEX Square Bot
Once we have finished checking our VEX inventory kit for all the necessary parts, we begin building the "square bot". The square bot is a generic bot that will be used to teach us the essentials of what a robot needs in order to function. The building instructions are quite basic and all you really need to get the bot moving is: 1. Build according to the instructions, attach all essential electronics (i.e. VEX brain controller, radio receiver, 2 motors, and a charged battery.
VEX Square Bot
Once we have finished checking our VEX inventory kit for all the necessary parts, we begin building the "square bot". The square bot is a generic bot that will be used to teach us the essentials of what a robot needs in order to function. The building instructions are quite basic and all you really need to get the bot moving is: 1. Build according to the instructions, attach all essential electronics (i.e. VEX brain controller, radio receiver, 2 motors, and a charged battery.
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