Speech Circuit Controlling the Robot

Posted on Feb 6, 2014

Triple check your pins on the datasheets for your chips and make changes if you need to. In my case, The RAM chip I used had a non-inverted enable on pin26, but the schematic assumed the enable was inverted. This caused the circuit not to work until I figured it out. Also, feel free to move the address lines around. These lines are mixed up on the

Speech Circuit Controlling the Robot
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schematic only to facilitate the PCB designed from Images co. Aligning SA0-A0 from the HM2007 to RAM and D0-D0 in the same fashion caused no problems for me. It works great and is easier to build on a breadboard. Soln. I am sorry that I cannot help in these cases at all as I did not choose to use this mode on the chip. However, there is some information in the Images Co datasheet Addendum and some more info on the talking toaster page as well as some info for interfacing the Arduino. (< that last link is the HM2007 wiki, great resource. ) 4. ) Redo the schematic from scratch (not as hard as you might think!) Use address lines SA0-A0 and data lines D0-D0 like in this schematic. Draw your own schematic. You may need to enlist the help of a professor or teacher to help you with this. 5. ) If nothing you do is fixing your project, it is very likely that your RAM chip or HM2007 is bad. This is not the most likely problem, however, I did encounter a bad HM2007 chip and a bad RAM chip. The best bet here is to order new chips. I made several orders from Images Co and was charges overall about $60 for shipping on everything.

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