Electronics Project Repository 

Distributed under the CERN Open Hardware License (https://ohwr.org/cern_ohl_p_v2.txt)C

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• 1. Crystal radio

     Sound clip1, clip2, clip3

Contributors: Chirag Kalelkar, Chandranibh Brahma (ME), Yash Foujdar (ME)

• 2. Dual-output regulated power supply (+/-12V) [Ver. 1]

Contributors: Chirag Kalelkar, Yash Foujdar (ME)

• 3. Dual-output regulated power supply (+/-12V) [Ver. 2]

Contributor: Chirag Kalelkar

• 4. Gas alarm

      Movie

Contributors: Chirag Kalelkar, Yash Foujdar (ME), Rickarya Das (EE)

• 5. Lorenz model

     Movie

Contributor: Chirag Kalelkar

• 6. Portable white noise source

    Contributor: Chirag Kalelkar

• 7. Pocket AM radio

     Sound clip1, clip2, clip3

    Contributor: Chirag Kalelkar

• 8. LED candle

        Movie

                      Contributor: Chirag Kalelkar

• 9. Tesla coil (Slayer Exciter circuit)

        Movie

      Contributors: Tankala Susritha (EE), Chirag Kalelkar

• 10. Metal detector

          Cellphone, Aluminum-sheet, Wooden-disk, Screwdriver-along-coil-axis

      Contributors: Grandhi Satya Sai (EE), Chirag Kalelkar

• 11. Useless machine (simplest possible design)

          Movie

      Contributors: Tusharanshu Pandey (ECE), Chirag Kalelkar

• 12. Human proximity/Metal detector

          Hand, Aluminum-sheet, Paper

      Contributor: Chirag Kalelkar

• 13. (a) Speaker amplifier module with volume and gain control (LM386)

            Movie

                    (b) Microphone pre-amplifier module with gain control (NE5532) 

               Movie        

      Contributor: Chirag Kalelkar

• 14. Dual-output regulated power supply (portable) [Ver. 3] ongoing

      Contributor: Tusharanshu Pandey (ECE), Chirag Kalelkar, Rickarya Das (EE)

Last update: 29/8/25