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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by piwi

  1. P

    Self-shutoff music player with rechargeable batteries for Kids

    I confirm that the processor goes to sleep: it stops executing code. Then I can wake it up and resume execution with a pin interrupt. Thank you for the reply. I will order a latching relay and give it a try. Quick questions: - Can you confirm you suggest using a double- winding latching relay...
  2. P

    Self-shutoff music player with rechargeable batteries for Kids

    Thanks for your answer. "everything is in the wrong place." Yep, I agree. The LilyPad MP3 is nice great has restrictions. Now I try to make the best of what I bought. I played with the sleep modes of the ATmega328P (find code here): Mode Current @3.7V NORMAL 21.5mA SLEEP_MODE_ADC...
  3. P

    Self-shutoff music player with rechargeable batteries for Kids

    Hi all, I'm building a kid MP3 player with a few buttons for my 2 years old son. It's very simple: button pressed-> turn up -> play music -> auto shutoff. For my first project I selected ready-made boards (with links): LilyPad MP3: it is an arduino 3.3V with a MCP73831 3.7V Lipo charger...

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