ok I built a driver using this diagram:
I did not use a pot meter though, for resistors I used a 10ohm and (2) 15ohm to get me 4.2 ohm (i used 1/2 watt 5%). Then rec. diode 1n4001, and a 10mfd 16v cap. heres pics:
http://www.flickr.com/photos/59411845@N03/5449484482/
http://www.flickr.com/photos/59411845@N03/5448876337/
I tested it and was getting just about no voltage through it, and the 3117 was getting very hot. I have read that all the 3117's are the same and just to use the pin layout like rog8811 shows, but the package shows different for the v in, v out, and adjust. It almost seems obvious that i should do it again and follow the package, but do you see anything else that could be wrong???? Thanks in advance!
I did not use a pot meter though, for resistors I used a 10ohm and (2) 15ohm to get me 4.2 ohm (i used 1/2 watt 5%). Then rec. diode 1n4001, and a 10mfd 16v cap. heres pics:
http://www.flickr.com/photos/59411845@N03/5449484482/
http://www.flickr.com/photos/59411845@N03/5448876337/
I tested it and was getting just about no voltage through it, and the 3117 was getting very hot. I have read that all the 3117's are the same and just to use the pin layout like rog8811 shows, but the package shows different for the v in, v out, and adjust. It almost seems obvious that i should do it again and follow the package, but do you see anything else that could be wrong???? Thanks in advance!