The Giant Claw Game! - Relay H-Bridge and Circuit Design

Over the week I worked on the Relay H Bridge,  software and circuit diagrams for this project. Only 1 more week till it needs to be done.

Relay H Bridge 

After finding out that my L298 H Bridge was not powerful enough to operate my gantry motors last week, I switched over to use a Relay H Bridge. The advantages of using a relay instead of the L298 is that the relay can take a lot more current but the switching frequency is much slower (~40 hz)

IN1 (IN3)	IN2 (IN4)	DIRECTION
1	0	Forward
0	1	Reverse
1	1	Motor stop
0	0	Motor stop

Image source: http://nvhs.wordpress.com/project/catspberry/motor-controller/

Circuit Design

I don’t have much experience with circuit design but I think this makes sense. I built it with circuitlab.com and online circuit designer.

 

 

Arduino Software

The code for the Arduino is pretty strait forward. Move the claw around until the fire button is pressed, then drop the claw and pick up a toy and bring it back to the start location. The source code for the The Giant Claw Game can be found on my GitHub account.