Thursday, January 14, 2010

Riedon’s UB Power Resistors Are Now Available At Digikey

UB series resistors offer same Mil-grade construction of our standard power resistors in small package, for applications needing to minimize board space. High grade materials utilized along with special construction techniques to enhance operating performance ensuring high power to dimension ratios. Resistors perform with excellent stability and environmental performance.

To Purchase contact Riedon , Digikey or any of our our Reps.

Wednesday, January 13, 2010

Looking for high temperture resistors and other passive components?

If you're looking for high temperature passive components for your high temperature applications, please check out our distributor, Tredsetter's website , for help or email them at to receive their complete guidebook.

Trendsetter sells High Temp Designer kits for $800.00 Plus S&H with 12 weeks delivery. Click here for Trendsetter website.

Tuesday, January 12, 2010

Resistors in LEDs

When I first attached a 280 ohm resistor in series with a 5mm red LED, the word on the street was that LEDs were low power, forever-lasting devices that would just about completely replace incandescent bulbs for simple binary indicators. LEDs spent a brief period as the numerical display device of choice too, until supplanted by the LCD. Regardless, the bottom line was that LEDs were really easy to work with. Just put that resistor in series - usually, you didn't even need to do the ohms law calculation - rules of thumb were good enough.
Continue to read here.

Riedon is a major supplier to LED market.

Saturday, January 2, 2010

Wirewound vs. Film Resistors for Precision Applications

Wirewound resistors have been around for a long time. They enjoy a long life because they have some very important features not duplicated by new technology products. If you must optimize circuit designs where precision is important, you should understand those characteristics.

For most of the history of electronic and electrical circuits, wirewound resistors were the only game in town for precision resistances. Wirewound precision resistors have some important characteristics. First, they can have very tight resistance tolerances . . . 0.005% is commonly achieved. More important, they are stable (15-50ppm/yr) maintaining their precision over time because they are made with stable materials. Their TCR (Temperature Coefficient of Resistance) is low (<10ppm/°C) and can be controlled by selecting special wire alloys. (Usually, you need the lowest TCR, but a higher TCR has special interest in some applications.)

Continue to read here.