Hardware clock
Recently the STEMLAND name board made using SSD had got dim and the 7th std students took it as a project to fix it. They de-soldered the dim SSD’s and Replaced it with new ones. Barani got interested in the SSD’s and...
Read out all(formerly Aura Auro Design) – LEARN, GROW, WORK, TEACH
Pre Amp
In Stem land I was trying to repair a preamp which was not working. I opened it and I tried to find the problem. The problem was that the circuit wasn’t connected properly. I made the connection. The preamp needs an Ac...
Read out allOscillator and Frequency measuring Instrument:
During Electronics: We were making an instrument to measure a high frequency. Using counter we want to measure high frequency that the CRO cant measure. We tried measuring the frequency of a oscillator and it was around 70 KHz. Prathap
Read out allFixing STEMLAND name board, and understanding SSD
Some of the 7th std children took fixing the STEMLAND name board as a project, they started off by learning how a SSD (Seven Segment Display) works. Then they assembled the units in a bread board, but there was a bug they...
Read out allControlling a single LED using two switches
During the electronic class that is held on every Wednesday afternoon at STEMLAND, Muthu had built a circuit and figured out how to control a LED using two switch model. His working prototype is as follows: Video of his prototype:
Read out allTwo Transistor Oscillator
We built a two transistor oscillator which turns transistors ON and OFF all the time. The speed in which it happens depends upon the value of the capacitor. The higher it is the slower is the process of turning ON and OFF....
Read out allCreating a Power Supply
In Stemland we got a car battery that was used, and to put it to use we came up with a project of creating a Power supply with various output voltages. To drive different Circuits with the different potentials. This Project was...
Read out allBefore Testing a Chip or PCB
Check model of all components. Check if the board is close to what we expect. Check resistance of the materials. Do the measurements that can be done without powering it up. Check simulations.
Read out allDebugging simulation run errors “integration methods”
When your simulation can’t complete and ends unexpectedly….. go to the Simulate/ control panel/Spice .. and change the default integration method to “GEAR” and things should run fine..
Read out allCreating a Spice Model from a .subckt file
The following video demonstrates on how to create a spice model of a component, from a .subckt file which can be acquired from the retailer. following is a spice model file for a bridge rectifier ; mb6s data sheet : MB6S_MCC –...
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