tag:blogger.com,1999:blog-8014888555955763990.post3579903142872364657..comments2009-06-22T14:12:06.395-07:00CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-8014888555955763990.post-51615604351616941842009-06-22T14:12:06.395-07:002009-06-22T14:12:06.395-07:00Hi Harsh, in Ahmedabad also, you can get this keypad from the electronics market where they sell electronic components or telephone accessories, I don&#39;t remember the area name right now.<br />You can try at following address, they have the 4x4 keypad:<br /><br />Sunrom Technologies<br />33, 1st Floor, Yash Niketan Complex<br />Opp. Khokhra Police Station<br />Khokhra Circle, Maninagar(East)<br />Ahmedabad - 380026<br />(item model No. 5000-0007)CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-79757104223982667522009-06-22T11:00:31.624-07:002009-06-22T11:00:31.624-07:00Hi sir,<br /><br /> I live in Ahmedabad (Gujarat - India). I saw in your profile that u live in chennai. My question is that from where did u get the 4x4 matrix keypad ? Because i have searched all electronic shops here in ahmedabad and i&#39;m unable to find it. Do u know any shop in ahmedabad from where i can get it ?Harsh Shahnoreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-10273770851508979942009-06-06T22:52:08.433-07:002009-06-06T22:52:08.433-07:00Hi, usually one side contains all the components and some tracks and other side contains only the tracks, as all the tracks can not be routed on one side due to higher density of tracks.<br />you can do the same in Protel also. You can use auto-routing, and it&#39;ll take care of the connections between two layers. when you give the layout for manufacturing, they&#39;ll make proper connections between two layer using PTH (Printed thru Holes)<br />If you are making the PCB at home, it would be advisable to first run the auto-router for bottom-layer and then whichever tracks remain unrouted, you can manually route them on the top layer. This way the complexity of the tracks will remain minimum on the top layer.<br />In home-made PCB, PTH will not be there, so you have to connect the two layers by passing small wires thru the holes and soldering them on both sides.CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-30884184339688114002009-06-06T20:27:53.231-07:002009-06-06T20:27:53.231-07:00How to maintain for component that should be on Top Layer and which component should be on Bottom Layer?<br />I try to design it using Protel 99 SE, can I do that?<br />How to connect between Top Layer and Bottom Layer on Protel Schematic?<br />Thankscahcybernoreply@blogger.com