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I wish I knew more than basic electronics! I would love to build a solid state 128gb drive thats uses 4 X 32 gb SD cards for a laptop. I can’t see why it would not be possible since card readers already treat SD cards like external memory.

It would be light, fast, cheap, conserve battery power, and would not require too much alteration of an existing laptop. Anyone brave enough to take on the challenge?

i run an video production company and we covers mostly events , concerts , dance party etc . Sometime we may need a small dual cam set up for live feed … and it very tedious to set up all this hard wire monitors ,visual mixer and patch bay etc jus for a small scale events. Thus i have in mind a very portable set up . A device to feed in two camera live feed and one output to screen ( this can be improved further ) connect to a MAC BOOK PRO via firewire and a preinstalled software that able to preview two cam LIVE feed as well as monitoring the main … at in one interface . and include basic visual transition like cross Fader but jus clicking a button …. this is no rocket science right …. but cant be found in the market yet ….

I’m a RS Store Manager at 01-8321, Fort Worth. As a takeoff of your LED flashlight, I’d like to see plans for a remote on/off switch using infrared 276-0142 or similar to be able to remotely turn on and off LED lights, or other low power devices or units.

This was easily a weekend project, and RadioShack had all the components. A phone line gives about 48vdc, with red being positive. Some older houses have mismatched wiring with green positive and some newer have digital signals carrying multiple lines on the same two wires. This project targets those with plain copper wire, on a single line, looking to feel like a fancy corporation with the phone gadgets. The action of ‘hold’ on a phone line allows the disconnection of all handsets, but keeps the line open and the end-user able to receive whatever we pipe in. A 330ohm 1/4 watt resistor in parallel with the phone line, acts as an active handset and allows enough current through to prevent the phone company from hanging up the call. With the line still open, we are able to inject linear audio from any source. This audio is heard by the end-user, and by us if our handset is still active.

Converting linear audio to ‘phone grade’ audio requires an isolation transformer between the audio source and phone line. A 47uf electrolytic cap gives plenty of filter buffer between the linear source and input. The transformer is non polar, though be sure the coil connections are paired as on the schematic. A 3.5mm headphone jack is our audio input source. Any form factor input connector can be used, though the most common connector for audio these days is the 3.5mm; a jack was used to simplify the design and keep all components contained. - ted

http://t.markson.us/projects/