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.
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.
Hi,
I am trying to make a usb charger. There are going to be two solar panels @3v 20mah in series, they will be trickle charging two 3v AAA batteries. What i am not sure about is how to stop the batterys from overcharging. I thought i could use zener. Help would be much appreciated, and...
Hi, I hoping to build a solar powered usb charger, this incorperates 2 AAA batteries at 1.5v each; these would be steped up from 3v to 5v (for usb charging) The idea of the solar panel is to be permentaly "trickle" charging the batteries. I am new to electronics and was wondering how to work out...
Hi, i am wondering, is it possible to have a mini solar panel permanently charging two aaa batteries. The idea is that the solar panel will be constantly supplying a source of power to a usb charger. Which would be @ 3 volts, steped up to 5 volts. Is this plan possible?If so any idea how improve...
Hi not really that sure on which type of fan to get i thought the case fans would be best but not sure? The Temperature sensor would be measuring the temerature around it. So it would make the fans speed up or down.
Thks
Hi,
I am trying to build a circuit with a thermally controlled fan with a battery power supply. Any idea on how i should approuch this? And i have seen soom schematics with a resistor with a arrow going into it, could anyone explain what this it and how it works. I have attach a picture of the...
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