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Vidyasagar Academy (Vidyasagar Sir)
391 followers -
A student of science, people call me teacher!
A student of science, people call me teacher!

391 followers
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Vidyasagar Academy (Vidyasagar Sir)'s posts

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IC 555 Soft touch switch door lock. Simple to construct as a mini project. Link: http://vsagar.org/

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Confused with the working of bridge rectifier? Then must watch this animated video. Link: http://vsagar.org/br/

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Why I am publishing this animated working of full wave rectifier circuit? Because in my long teaching experience, I have noticed that sometimes, the 11-12th standard students get confused with its working and cannot properly explain it. This same case occurs for HWR and BR, as well, which are also explained.
Visit this link for more details: http://vsagar.org/fwr

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Why I am publishing this animated working of half wave rectifier circuit? Because in my long teaching experience, I have noticed that sometimes, the 11-12th standard students get confused with its working and cannot properly explain it. This same case occurs for FWR and BR, as well, which are also explained.
For more details, visit this link: http://vsagar.org/hwr/

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This is another circuit of IC 555 infrared burglar alarm project. It is very simple to construct and submit it as a mini project for your school and college level project submission. The basic idea of the circuit is almost same used in the previous circuit of IC 555 simple burglar alarm (published on our website), only the wire loop is replaced with LDR. You can also use infrared sensor in this circuit instead of LDR.
You can check the complete working of this project on this link of our website: http://vsagar.org/ic-555-infrared-burglar-alarm-project/

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This is another circuit of IC 555 simple burglar alarm mini project. It has been fully tested in our lab and its PCB layout is also given on our website at following link. The circuit uses the simple trick that whenever, pin-4 i.e. the RESET pin of IC 555 is grounded, all its functions stop. But when it is raised to +ve supply, then the IC works normally.
For more details of the working and pcb layout, visit this link: http://vsagar.org/ic-555-simple-burglar-alarm/

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This is a very interesting circuit of IC 555 Head or Tail Project. It uses a simple trick that if we break the charging path of the timing capacitor in AMV circuit using IC 555, then the output condition of the circuit remains locked in a particular state.
For more details about the circuit and its PCB layout, visit this link: http://vsagar.org/ic-555-head-or-tail-project/

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This circuit of IC 555 as adjustable duty cycle flasher is unique. It uses the trick of charging the timing capacitor C1 through two different paths of resistors R2 and R3, via two independent diodes D1 and D2.
For details of working and practical PCB layout visit at following link:
http://vsagar.org/ic-555-as-adjustable-duty-cycle-flasher/

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