Author Archives: Sundranandhan

Auro Orcharid – Gardening and Honey Bee’s

Naveen had planned a trip to Auro orchard with the isaiambalam school children. There were two groups. One were interested in the getting to know about the honey bees and the other on methods of bed techniques.

Uma Ramanan a member of the farm introduced us to Auro Orchard, the first farm designed to sustain Aurovilles people back in time.

The day started by looking at raised bed technique and types of vegetables that they have grown.

Children were able to seen how much the production had increased due to the raised beds. (On an avg a turmeric plan can only produce 300gm of product but here they were able to collect up to few Kg)

The Papayas they have are not hybrid varieties the seeds can be used to grow new saplings.

This flower has medicinal values (kills germs and is antibiotic in nature) and are loved by honey bees as they grow through out the year.

Then came the honey bees, Uma explained that the bees are farmers most important friend as they are the major pollinators, and they don’t use them to collect honey in the farm. but recently a bee hive had vacated the trunk as it had over grown its population and moved out. Hence they had to empty the wax.

 

Then the children had a group discussion on the the life cycle of bees.

And at last they were able to see the bee hives that were in the farm 🙂 .

 

The children had a wonderful time, and are eager for another visit to the farm.

 

Unit conversion

Along with the 6th and 7th in Isaiambalam school, we wanted to estimate how far one Km would be. All the students made a guess and wrote down their check point on a route from their class.

The children wrote down how far their guess was compared to a Km, and took other nine checkpoints of other children, when they went back to class they decided to convert each checkpoint to meters, decameters, and hectometers.

Garden EBD

-Sundar and Arun

The children in Isaiambalam, had started an EBD on garden. There were already two two sets of steps(for creating beds, in order to plant) built using cement and bricks on the front side. The left side looked a little incomplete, The task was to complete a step on the left side of the structure. To do this the children had to dig out the excess soil to lay the first set of bricks.

To create the trench children had wired and made a straight line before digging. Before laying the bricks the leveling had to be checked, this was done using a tube level( a tube filled with water)

Then the cement was mixed to sand in a ratio of 1:3 along with required amount of water.

Brick work started.

Once the side steps where complete the children used the fraction kits to tell stories of proper fractions. Which they had used to while mixing cement of sand. They needed 7 pans of sand and 2 and 1/3 pans of cements.

Once the structure was complete the students had come up with values for the project. That were Respect, equality, and perseverance, and helping.

Then they started to estimate the build of materials and their cost. It started by calculating the number of bricks for 1m and expanding to number of meters they used it for. With this they started to tell multiplication and division stories.

 

 

 

 

Fraction stories with the 5th graders

The fifth graders of Udavi School started fractions, they used the material and created their own procedure. They picked cards(with proper fractions written on them) and found the required pieces and drew it on their note and exchanged stories amongst their groups. Then they played a game within in the group to assemble the appropriate fraction in the least time.

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Salvaging wires and hacking a 240V to 9V transformer from an adapter

The 7th graders from Udavi School took a project on creating a PA system. To start of we required a lot of wires so the quest for salvaging wires began. The students picked every wire possible in STEMLAND that was not being used, we had a long Ethernet cable that was damaged and removed the outer casing and rolled up the inner wires. Once the required amount of wires were acquired we needed a power supply, a broken adapter that was found among the damaged equipment’s came into good use. We opened the case and took the transformer.

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Then the primary and secondary winding s were checked for connectivity using a multi-meter.

Next the transformer was hooked up to a plug and carefully soldered and covered using heat shrink cables for maximum protection from the input voltage, thus it was ready to be tested.

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The output of the transformer was connected to the oscilloscope, but only showed 2V to 3V. But when tested with a multi meter it showed 8.5V the expected voltage. This was a little confusing. In the end  by accident after removing the power we touched the transformer it was really hot. the adapter that the transformer was salvaged must have had burnt the core of the transformer, a while back. Then the hunt for a new transformer began.

7th girls and boys working with SSD (Seven Segment Displays)

The SSD’s had really picked up during the project period with the 7th children after Barani had created a project. The girls started to understand and light up the letters they wanted. They used the multi meter in diode mode to test whether the SSD’s where common anode or common cathode in configuration. Initially they were powering up the SSD’s with a 9V battery, then they started to use the arduino.

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link to Barani’s Project: http://www.auraauro.com/circuits-simulations/hardware-clock/

Along with them Nirmal had also joined the team and started to understand SSD’s with the support of Shalini and Sushma.

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