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A while ago I read here that it's a good idea to have ceramic capacitors on the input and output pins of 78xx regulators and to put \$10 \mbox{ } \mu F\$ on the input and \$1 \mbox{ } \mu F\$ on the …

Yes, USB charger is a regulated power supply. USB devices expect around 5 V on the Vcc line. Do note that the regulation on some of the cheaper USB power supplies is pretty bad, especially if you're n …

My advice here would be to try to get a 5 V power supply with at least 1.5 A output just to be sure. Then get a linear 3.3 V regulator. A heatsink may come in handy as well, but most likely won't be n …

To me it looks like you've connected the power backwards. If the green clips are input power and the unconnected lead is where you're measuring the voltage (and I'm assuming this, since there's no ad …

So let's take your 0 V and -12 V example. From the positive regulator's point of view, you don't have 0 V and - 12 V. Its GND, that is to say it's local 0 V, is whatever is connected to its GND pin. …

I'm powering a 12 V computer fan with a simple 7810 circuit shown here: When the fan is connected to the regulator, on the output I get this wave: When I zoom out in time, I get something that l …

I'm thinking of using two regulators to create a ±5 V power supply. I'd use a 10 V regulator and a 5 V regulator and use the 5 V regulator's output as ground for the circuit and 10 V regulator's groun …

The voltage drop in the cables is going to be negligible or the cables are very likely going to be melting. For example in a common household \$0.75 \mbox{ } mm^2\$ cable, you'll need around 24 meters …

You're going to need voltage divider on the USB data lines as explained in this answer. This controls the charging modes for iDevics and is needed for them to start charging. Next, the datasheet say …

On the first page of the data sheet, it is said that it has adjustable current up to 2 A. Another very important thing is note 1 on the page 4. It says that up to 2 A can be provided if the differenc …

I'm thinking about connecting a micro SD card to my ATmega162 perfboard, but for that I need 3.3 V source which can provide up to 100 mA. Most obvious option would be to run the whole board at 3.3 V …

You could take a look at L200 regulators. They should be capable of providing 2A if the difference between input and output voltage is lower than 20 V, if I remember correctly. Control circuit is also …