Shankara Vidyalaya School, Kolar Science Exhibition

The team recently went to Shankara Vidyalaya School, Kolar on Sunday the 18th Feb. 2012,  to setup and give a demo of Amateur Radio to students and parents from different schools. The Team setup two antennas and equipment for students to have a look and also have an hands on experience of Amateur Radio. We were very fortunate to have Mr. Govindraju, (KAS Officer, Assistant Commissioner of Commercial Taxes), VU2COD to offer his valuable time to give demo of Amateur Radio to students and parents. We heartily thank Mr. Govindraju, VU2COD for his presence and time spent with us.


We also got a little break to check out other students science projects. Some were very interesting. Have a peak of the photos of the Science Fair held at Shankara Vidyalaya School, Kolar

The Team all setup to show a demo to the students

Mr. Govindraju, (KAS Officer, Assistant Commissioner of Commercial Taxes), VU2COD with the Team

The Exam Board Model for students

Mr. Govindraju, VU2COD giving a demo

Mr. Govindraju, VU2COD giving a demo

HAM Radio Rx. Chart prepared by students

Antenna setup on the roof of the school

Inverted 'V' dipole antenna setup on the roof of the school

Low Power Transmitter on Examination Board

Greetings everyone!!!!!!!!!!!!

We have built yet another gizmo on an examination board. Why do we like to build on the exam boards? Simple, for students. That's right, we built this Low Power Transmitter for demo purpose for students. When we showed the demo of the transmitter with the GR-40 Rx. Exam Board version, the students were really thrilled and excited which we exactly want. The Tx. works on 12V Battery with output power of less than 5mW for frequency range 7MHz to 7.2 MHz and we got distance of upto 10 feet.

So, what have we used:-
1.) Frequency Counter Display Card
2.) JOTA 40- meter Tx.
3.) GR-40 VFO

• Main tuning
• Fine tuning
• Volume Control
• Freq. Display
• Supply post
• Antenna Connector
• Microphone connector and Mic

Low Power Transmitter (with Mic) and GR-40 Rx. on Examination Boards

Low Power Transmitter

Low Power Transmitter

Low Power Transmitter with Mic

Frequency Counter Display, Main and Fine Tuning, ON/OFF switch and Mic Connector

JOTA 40 Tx. card

GR-40 Rx. VFO card

GR-40 Workshop at GMRIT, Rajam, Srikakulam(Dist.), A.P.

 GR-40 Workshop at GMRIT, Rajam, Srikakulam(Dist.), A.P.

Event: GR-40 Workshop
Date: 4th, 5th and 6th February 2012
College: GMR Institute of Technology
Branch: Electronics and Communication
Venue: Rajam, Srikakulam (Dist.), A.P.

Number of groups for kit assembly: 33 Kits
Number of days of workshop: 3 days
 
Day 1: The workshop was started with an inauguration function held in the auditorium where Prof.Basavaraj Neelgar, HOD of ECE Dept. GMRIT, Sri Ramaprabhu, G.M. Micronova Impex Pvt. Ltd. Bangalore, Dr. C.L.V.R.S.V. Prasad, Principal of GMRIT, Mr. K. Krishna Kishore,  Asst. Professor GMRIT were present. The GR-40 kits were handed over to the students and a brief explanation of the GR-40 was given for the students and faculty. The students started to assemble the kits.

Day 2: The whole day was spent on assembling the kits. Later in the evening about 15 kits were ready to test and completed.

Day 3: Sri. Ramaprabhu gave a seminar lecture on ISDR to the students and faculty. Later on the students completed the GR-40 receivers and by evening all the 33 kits were completed and was tested using the inverted V antenna. Later on in the day, certificates were handed over to the students by  Prof.Basavaraj Neelgar, HOD of ECE Dept. GMRIT, Sri Ramaprabhu, G.M. Micronova Impex Pvt. Ltd. Bangalore, Mr. K. Krishna Kishore,  Asst. Professor GMRIT.

Prof.Basavaraj Neelgar, HOD of ECE Dept. GMRIT, Sri Ramaprabhu, G.M. Micronova Impex Pvt. Ltd. Bangalore, Dr. C.L.V.R.S.V. Prasad, Principal of GMRIT at the inauguration function

Students opening the kits and deciphering the components

GMRIT students assembling the kit

Component placement and soldering in progress

Engineer Vishwas, MIPL Bangalore helping the students

Kit assembly

Frequency Oscillator

Greetings...

We recently wanted a Signal generator for testing our ISDR during workshops and decided to build a Frequency Oscillator. So we modified the VFO circuit of the GR-40 Receiver and made a FIXED Frequency Oscillator or rather a Signal Generator which gives us a freq of approx.  7.012Mhz. The whole circuit was built in a tin box which we get as complimentary snack box in flights these days.

You can find the circuit for our GR-40 Rx. Tab, on the HOME page where you will find the circuit in the VFO section. Here are the pics of the build: