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Very nice project.Wouldn't be much of a problem to use thru hole components with this design now would it?Also: not really sure how to modify the board for the LM1117 and the L7805...
also very interested in attiny but the absence of i2c is a big issue for me.
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My girlfriend has toys too but those cannot be turned down with an added resistor. Sometimes I wish I could add a resistor to the girl herself, but she is irresistable! ;-)
Very nice project. If you use a ds3132 rtc module you can lose the dht11. The only thing you would lose is the humidity sensor: Temperature is also available on the ds3132. Also it would keep much better time than a ds1302 module.
nice! What a coincidence that I have made exactly the same gadget for 4x 18650 batteries!
You could have said this a little more subtle. If you start low and don't go to high on the resistor value you will not break anything. Especially when there is no volume control on the toy it self. Try at your own risk but start with low resistor values. Volume control on an amplifier is often nothing more than an adjustable resistor.
Nice share. Though it's a very simple hack, it will surely help some frustrated parents. One advice: start LOW (<100 ohm) on the trial resistor values. If there is some volume control on the toy, glueing the volume control stuck at the desired level is a safer option.
I love this tutorial! Never knew the Arduino had build in pull up resistors: so much easier, projects with less components. Also love the interupt example: very educational.
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