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.
If the roast is very lean you may want to drizzle a tablespoon of olive oil or two over the roast. Sprinkle salt and pepper over the roast. Place the roast on a wire rack on a baking sheet. Bake the roast for approximately 25 to 30 minutes for every pound of meat for a roast to be cooked to medium.Adjust accordingly for your preferred level of doneness. You should use a meat thermometer to determine when the roast is done. Push the meat thermometer all of the way into the center of the roast.lace the roast on a wire rack on a baking sheet. Bake the roast for approximately 25 to 30 minutes for every pound of meat for a roast to be cooked to medium. Adjust accordingly for your preferred level of doneness.