The HV9910B includes a PWM dimming input that can accept an external control signal with a duty ratio of 0 - 100% and a frequency of up to a few kilohertz. It also includes a 0 - 250mV linear dimming input which can be used for linear dimming of the LED current. The HV9910B is ideally suited for buck LED drivers.
The oven temperature used to cook a beef roast is usually set somewhere between 300 degrees and 450 degrees Fahrenheit. The recommended cooking temperature for your roast is usually determined by the type of beef cut that you plan to roast.
Preheat oven to 500ÂºF. Season roast generously with salt and pepper. Create a rack, by placing roast bone-side down in pan. Place beef in oven and roast 15 minutes.Turn heat down to 325ÂºF and continue roasting about 2 hours for medium (when thermometer placed in center of roast registers 140ÂºF before resting) or until desired doneness.Because roast sizes vary, figure 12-15 minutes of roasting time per pound after initial sear.nstructions: 1  Preheat oven to 500ÂºF. Season roast generously with salt and pepper. 2  Place beef in oven and roast 15 minutes. 3  Transfer roast to cutting board; loosely tent with foil and let stand 15 to 20 minutes.