{"id":26,"date":"2008-03-29T07:33:04","date_gmt":"2008-03-29T07:33:04","guid":{"rendered":"http:\/\/brainstorms.in\/?p=26"},"modified":"2008-03-29T07:33:04","modified_gmt":"2008-03-29T07:33:04","slug":"summer-projects-for-students","status":"publish","type":"post","link":"https:\/\/brainstorms.in\/?p=26","title":{"rendered":"Summer Projects for students"},"content":{"rendered":"

This post is for my students at college of engineering<\/a> Attingal . We are going to get vacation during May and June. I think your semester examination will be over by April end. I have a small project which some of you can take up during this summer vacation. The project is related to amateur radio. If you are able to do it, this will be a fine minor project for your sixth semester. However, my aim is to introduce some of you to micro controllers and embedded systems early in your course. I don’t find many home brewers among students nowadays. This will be an ideal opportunity to learn a few tricks.<\/p>\n

Now here is the idea. I have a few fixed frequency VHF transceivers. They are Philips Portaphone SXA rigs made around 1977. The figure below show one.<\/p>\n

The transceiver can take 6 fixed frequency crystals on the receiver as well as transmitter side. That means it has only six fixed channels. Now ,I have a pair of crystals cut for the Trivandrum amateur repeater. (RX 145.600Mhz TX 145.00Mhz ). That means I am operating it only on a single channel.<\/p>\n

I want to convert it to a variable frequency transceiver by adding a DDS ( direct digital synthesis ) controlled oscillator, replacing the crystal oscillator.<\/p>\n

Your Task will be to build a micro controller board and a DDS board and drive the tranciever for covering the amateur band of 144-146 MHZ. You can choose either a PIC or an Atmel processor. For the DDS , an Analog devices AD9851 will be sufficient. There are some similar projects on the net. You can look here.<\/a><\/p>\n

Do a search on google for DDS VFO .You will find more links. This project will be on similar lines. But the programming and driver circuit for the transceiver will be different . The output of DDS should be switched between receiver and transmitter frequencies. I will give you more details later.<\/p>\n

You are expected to do the following<\/p>\n

a) Study of the chosen micro controller.<\/p>\n

b) Design the board and simulate it .<\/p>\n

c) Study about DDS.<\/p>\n

d) Design a DDS board.<\/p>\n

e) Design PCBs for both the boards and build<\/p>\n

f) Test the prototype in lab.<\/p>\n

g) Make a suitable cabinet and build the final product.<\/p>\n

A detailed requirement specification will be given later.<\/p>\n

I have the following stuff with me .<\/p>\n

a) Some PIC micro controllers<\/p>\n

b) DDS chip AD9851<\/p>\n

c) Some LCD displays<\/p>\n

d) Assorted components.<\/p>\n

I can provide you with a PIC programmer if you choose PIC. I can fund you for any costly ( say greater than $2). Rest of the stuff ,you will have to find out.<\/p>\n

I can take 3 guys . Each one should do it independently.<\/p>\n

You must be willing to work during vacation. I will be coming to college on a few days to college during vacation. Otherwise, you can interact with me on internet . A PC and an internet connection at home is a must. All designs and programs should be posted on internet and must be under a suitable free license.<\/p>\n

I will give some preference to second year guys. (but first years can also be considered.). If you are interested , drop me a mail at vu2swx at gmail. com.<\/p>\n","protected":false},"excerpt":{"rendered":"

This post is for my students at college of engineering Attingal . We are going to get vacation during May and June. I think your semester examination will be over by April end. I have a small project which some of you can take up during this summer vacation. The project is related to amateur… Continue reading Summer Projects for students<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-engineering-education"],"_links":{"self":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26"}],"version-history":[{"count":0,"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts\/26\/revisions"}],"wp:attachment":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}