9 Aug 2004 anttch360   » (Observer)

For my first robot arm project, Fred and I just found out that the PLC that we are using only puts out 120V AC. Which is fine for our hand motor but our two other motors (base and arm) are 12V DC. Our teacher never bother telling us this... So now we are gonna use two 120V AC relays to switch on and off a power supply of 9V batteries, which would power the DC motors.

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