A Relay is similar to a switch. Instead of using physcial interactions to activate the switches, a relay rely on the magnetic field set up by a conducting coil to activate (or energizes) itself. In other words, a relay is an electrical self activated switch. Meanwhile, a relay are more applicable with high current.
A type of relay used in my circuit.
Some schematics with relays connected. The relays here perform as oscillator, when the coil is energized, it will open a contact to disturb power to the coil and relax the relay. The contact will then close again after it is relaxed. This process keep repeating until there is no power supplied to the relay.
The relay oscillator turns off and on both LEDs as well as making a buzz sound as the oscillation goes on.
By adding a capacitor parallel to the coil, it will slow down the oscillation as some power are used to charge the capacitor. The clicking sound replaces the buzz sound as the oscillation slows.
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Constructing a Vex square bot is easy by simply following the instruction manual. However, some parts of the square bot are missing so that finding replacements proves to be the most difficult task in building the robot.
A completed square bot with the processor and battery installed.
The square bot will be ready for driving test, and crashing test in the next class.
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