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Diode Pin 1

Math probs... I know the answer but The first who can answer correctly will be the best!?
you have $3000 in your pocket, and want to purchase 3000 pcs of devices. You are going to buy LED(light emitting diode) costs 5 cents or $0.05 each, pin light costs $1.00 and flashlight costs $5.00 each. how many LED, pin light and flashlight you will buy?
3000 pin lights
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Pyle LAN Tester,Multimeter and Diode Tester $110.8 2 in 1 LAN Tester and Multimeter with Voltage, Current, Resistance, Continuity, and Diode Tester Tests Pin Configuration for 10 Base-T, 10 Base-2, RJ45/RJ11, 356A, TIA-569A/568B and Token Ring Cable Remotely Test Cables Up to 330 Yards Away Test Ground Wire Measure DC/AC Voltage, DC/AC Current, Resistance, Continuity, and Diode DC Voltage: Max Range 600 V, Accuracy +/- 0.5% AC Voltage: Max Range 600 V, Accuracy +/- 1.2% DC Current: Max Range 200 mA, Accuracy +/- 1.2% AC Current: Max Range 200 mA, Accuracy +/- 2.0% Resistance: Max Range 20 MO, Accuracy +/- 0.8% Continuity Test: Beeps If Less Than 100 O Accessories Included: Test Leads, LANtest Remote Terminator, 9V Battery, Carrying Case Dimensions: 6.38" H x 2.93" W x 1.73" D Weight: 10.86 oz. |
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Alchimie Forever Diode 1 + Diode 2 Age Defying Serums $89 These two age defying serums are packaged separately to maximize the benefits of the antioxidants derived from rosemary and green tea. This powerful combination tones and energizes the skin, providing an immediate firming effect. The skin is smoother and tighter after a single application. With continued use, these serums help diminish the appearance of fine lines and brown spots. Tighten and firm . Even out pigmentation . Reduce the appearance of fine lines Directions: Apply two pumps of Diode 1 over cleansed face and neck, morning and evening. Follow with Diode 2. Should be worn under moisturizer. Suitable for all skin types. Net Weight: (15 ml/0.5 oz.) x 2 Ingredients: Diode 1: Water/Aqua, Propylene Glycol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Cellulose Gum, Methylparaben, Chlorphenesin, Sorbitol, Phenoxyethanol, Ethylparaben, Propylparaben, Butylparaben, Isobutylparaben. Diode 2: Water/Aqua, Propylene Glycol, Camellia Sinensis (Green Tea) Leaf Extract, Cellulose Gum, Methylparaben, Chlorphenesin. |
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150mw DorcyJr red laser at night
Op amp half wave rectifier?
Consider this circuit:
http://sound.westhost.com/appnotes/an001-f3.gif
you supply a small 2V pk-pk sinusoidal signal at Vin. What will the peak current be through the input resistor?
Knowing this will be the same current going through either diode, why don’t we get the typical voltage drop of 0.7V across the forward-biased diode?
Using n=1.8, what do you get for the voltage drop across the diode? (I just need to know which formula to use) Assume a reverse current of 25nA.
Using the peak positive and negative voltage values at the input, determine Vout and the voltage right at the op amp output (pin #6) for both extreme voltages.
Since Billruss answered questions 1,2, and 4 quite nicely, I'll answer 3
3 The diode equation is I = Is( e^(Vd/nVt) -1), and since Is = 25 nA, Vt = 25 mv, and n =1.8
1x 10^(-4) = 2.5 x 10^(-
( e^(Vd/ 40) - 1)
4 x 10^3 = e^(Vd/40)
take the natural log
8.29 = Vd/ 40 mV
Vd = 330 millivolts















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