Tag Archives: usb

USB Powered Audio Power Amplifier

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This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low cost, high flexibility and wide temperature tolerance. At the heart of the circuit is IC TDA2822M. This IC is, in fact, mono-lithic type in 8-lead mini DIP package. It is… Read more »

Symmetric Output for USB Audio DAC

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This simple adapter circuit is specially intended for use with the USB Audio DAC published in this website elsewhere. With an easily implemented modification, it is possible to make the output of the D/A converter pseudo-symmetric, so that it can be connected to professional equipment having XLR line inputs. This… Read more »

Hacks and Mods: USB Keyboard Made from Old Typewriter

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Looking for a unique gift? Here’s an antique typewriter which has been modified to function as a USB Keyboard for PC, Mac, or even iPad. That’s very cool, isn’t it? In the world of obsolescence, this USB typewriter is a groundbreaking innovation. It does not change the outward appearance of… Read more »

USB Fuse

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Life in the 21st century would be almost unbearable without some of the computer peripherals that PC users now look on as essentials – take for example the USB powered teacup warmer; this device is obviously an invaluable productivity tool for all users but it could prove a little tire… Read more »

USB Operated Home Appliances

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When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as well. By using the 5-V supply voltage from the USB interface on the PC, all these peripherals can easily be switched on and off at the… Read more »