Pikir dan Rasa

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Archive for September 2012

Screwdriver kit, kit obeng

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Hasil temuan tak sengaja di toko spare part “hape”. Cocok buat tinkering & praktik sistem elektronik, lengkap dengan soft case yg bagus. Harga relatif cukup murah 🙂

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Written by sunupradana

September 20, 2012 at 8:16 pm

Posted in Electronics, Sisi ringan

Tagged with , , ,

Hedy Lamarr, CDMA & Qualcomm

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Written by sunupradana

September 16, 2012 at 4:40 pm

Aavid Thermalloy – heatsink design tools

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” … Heat sinks are devices that enhance heat dissipation from a hot surface, usually the case of a heat generating component, to a cooler ambient, usually air. For the following discussions, air is assumed to be the cooling fluid. In most situations, heat transfer across the interface between the solid surface and the coolant air is the least efficient within the system, and the solid-air interface represents the greatest barrier for heat dissipation. A heat sink lowers this barrier mainly by increasing the surface area that is in direct contact with the coolant. This allows more heat to be dissipated and/or lowers the device operating temperature. The primary purpose of a heat sink is to maintain the device temperature below the maximum allowable temperature specified by the device manufacturer.” http://www.aavid.com/thermal-tools/how-to-select-heatsink

Written by sunupradana

September 11, 2012 at 11:59 am

Hagar the Horrible, 20120907 [comics]

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Written by sunupradana

September 10, 2012 at 7:10 pm

SciFri: Seeing Through the Smoke — The Secrets in a Cigarette

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Written by sunupradana

September 10, 2012 at 9:56 am

Posted in Podcast, Science

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Some Multitasking Is More Taxing [podcast,mp3]

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Some Multitasking Is More Taxing
28 JUL – 60-SECOND MIND
Recent research finds that different forms of multitasking can impact our performance much more than others. Christie Nicholson reports.
scientificamerican.com download mp3

Written by sunupradana

September 7, 2012 at 11:58 pm

Homemade forced convection heat sink test [photo]

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Uji coba sederhana keping pendingin (heat sink) dengan kipas biasa (bukan blower). Untuk set up seperti ini hasilnya heat sink mendapat aliran udara sekitar 228 ft/min.

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Written by sunupradana

September 7, 2012 at 10:24 pm