Maximum Reverse Voltage Diode

How to Calculate a suitable value of a limiting resistance?

a zener diode has a reverse breakdown voltage of 14 Volts,with a maximum load current of 70mA and an unstabilised supply voltage of 28 volts . Calculate a suitable value of a limiting resistance

What is the minimum and maximum voltage out of the supply? I'll assume 24 min, 32 max, you can change the numbers if you need to.

What is the minimum and maximum zener voltage? they are usually 5%, so that is 14.7, and 13.3 volts.

What minimum current do you want through the zener? A higher value will help regulation, but increase heat. I'll pick 10 mA.

Total current will be 80 mA
R = (24–14.7)/80 = 116Ω at worse case. Use 110Ω.
Assume 5%, so min/max is 104.5Ω and 115.5Ω

Current through resistor at low line, high zener, this is the min
I = (24–14.7)/115.5 = 80.5 mA

Current through resistor at high line, low zener, this is the max
I = (32–13.3)/104.5 = 179 mA

worse case power in resistor
P = I²R = 0.179²104.5 = 3.3 watts, use a 10 watt unit.

worse case power in zener
P = I²R = 0.179*14.7 = 2.6 watts, use a 5 watt unit. with a heat sink.

Maximum Voltage $18.52 No Synopsis Available

Over Voltage Protector $61.95 Electronics of modern cars are at risk from voltage surges during a number of common daily jobs. Surges during MIG welding, jump-starting, battery charging and starting are just a few. Damage to systems such as Air Bags and ABS may not be immediately apparent, but could prove fatal. Engine management systems, fuel injection, radios, alarms and many other delicate electronics can be destroyed. You could be liable for damage to a customer?s vehicle. ? Equipped with an LED indicator to show that the unit is providing protection and installed correctly. If the unit is overloaded or damaged, the light will go out. ? Gives greater protection than other comparable units. ? Features a heavy-duty varistor, not a small diode insuring maximum protection and maximum peace-of-mind.By Dent Fix Equipment.

Transmission Lines and Schottky Diode $108.33 A nonlinear relation between current and voltage for schottky resonant tunneling diode is used. A general form of equation similar to VanDer Pol equation is obtained. A Resonant tunneling diode(RTD) has a negative differential resistance that means when the voltage increases the current decreases. This property is very useful for oscillators manufacture. Nonlinear transmission lines is considered to show that it canbe used in oscillators and to show that it can reshape the sinusoidal signals to othershapes by using OrCad and mathematica programming. Author: ElKhozondar, Hala J./ ElKhozondar, Rifa J./ Abo Ireban, Ibtisam Binding Type: Paperback Number of Pages: 80 Publication Date: 2011/07/12 Language: English Dimensions: 9.02 x 5.98 x 0.19 inches

1.9' LCD Handheld Digital Multimeter (Voltage + Current + Resistance / 1*6F22) $16.7 - Professional fully featured handheld digital multimeter- It measures AC/DC voltage, resistance, diode check, transistor hFE test and etc.- Display: maximum reading 1,999- DC voltage: 200mV~600V0.8%- AC voltage: 200V~600V1.2%- DC current: 200~10mA2.0%- Resistance: 200O~20 MO0.8%- Powered by 1*6F22 battery (included)- Comes with a pair of test leads

2.0' LCD Handheld Digital Multimeter (Voltage + Current + Resistance / 3*AAA) $15.3 - Professional fully featured handheld digital multimeter- It measures AC/DC voltage, resistance, diode check, transistor hFE test and etc.- Display: maximum reading 1,999- DC voltage: 200mV~1000V0.8%- AC voltage: 200mV~750V1.2%- DC current: 200~10A2.0%- AC current: 2m~10A3.0%- Resistance: 200O~20 MO1.0%- Powered by 3*AAA batteries (included)- Comes with a pair of test leads

Reverse $22.99 Reverse

Voltage Doubler $54.86 High Quality Content by WIKIPEDIA articles A voltage doubler is an electric circuit with an AC input and a DC output of roughly twice the peak input voltage. They are a variety of voltage multiplier circuit and are often, but not always, a single stage of a general form of such circuits. The term is usually applied to circuits consisting of rectifying diodes and capacitors only, other means of doubling voltages are not included.The Villard circuit consists simply of a capacitor and a diode. While it has the great benefit of simplicity, its output has very poor ripple characteristics. Essentially, the circuit is a diode clamp circuit. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 68 Publication Date: 2010/07/14 Language: English Dimensions: 6.00 x 9.00 x 0.16 inches

1.9' LCD Handheld Digital Multimeter (Voltage + Current + Resistance + Temperature/ 1*6F22) $17.1 - Professional fully featured handheld digital multimeter- It measures AC/DC voltage, resistance, diode check, transistor hFE test and etc.- Display: maximum reading 1,999- DC voltage: 200mV~600V0.8%- AC voltage: 200V~600V1.2%- DC current: 200~10A3.0%- Resistance: 200O~2MO0.8%- Temperature: -20C~1000C3.0% (C/F selection)- Powered by 1*6F22 battery (included)- Comes with a pair of test leads

1.8' LCD Digital Auto Range Pen Type Multimeter (Contact-free Voltage Test / 2*AAA) $27.3 - Professional fully featured pen-type digital multimeter- It measures AC/DC voltage, resistance, diode check and etc.- Display: maximum reading 1,999- Supports auto power off- Auto/Manual range- DC voltage: 200mV~600V0.7%- AC voltage: 200mV~600V0.8%- Resistance: 2O~20 MO1.2%- Powered by 2*AAA batteries (included)- Comes with a soft carrying pouch

3.0' LCD Handheld Digital Multimeter (Voltage + Current + Resistance + Temperature/ 2*AAA) $32.3 - Professional fully featured handheld digital multimeter- It measures AC/DC voltage, resistance, diode check, transistor hFE test and etc.- Display: maximum reading 6,000- DC voltage: 600mV~1000V- AC voltage: 6V~1000V- DC current: 600~20A- Resistance: 600O~60MO- Temperature: -40C~1000C/0?~1832?(C/F selection)- Powered by 2*AAA battery (included)- Comes with a pair of test leads

Samlex SDC5 2412V Converter DcDc 5 Amp Maximum $57.72 Advanced switch mode design. Mount in almost any location. Compact and light weight. Reverse polarity protection. High efficiency. Cycle by cycle current limiting circuit. Over voltage protection. Short circuit protection. Dimensions: 1.75 x 1.75 x 3.5.

1.5' LCD Handheld Auto-Range Digital Clamp Multimeter (Voltage + Current + Resistance / 3*AAA) $31.5 - Clam shaped design- Features 1.5" LCD display with backlit- Auto/Manual range- Maximum value hold, data hold, SMT application- It measures AC/DC voltage, resistance, diode check, transistor hFE test and etc- Display: maximum reading 1999- DC voltage: 200mV~600V- AC voltage: 2V~600V- AC current: 2A~600A- Resistance: 200O~20MO- Powered by 3*AAA battery (included)- Package included:- 1 * Digital clamp meter- 1 * Pair of test leads- 1 * Soft carrying bag- 1 * Chinese user manual

PyleHome PDMT08 Compact Digital Multimeter With ACDC Voltage#44; Current#44; Resistance#44; Diode Check#44; Continuity Test $75.39 DoubleMolded Plastic Housing. HighContrast LCD Display. CATIII Rated. Voltage DC: Max Range 600 V Accuracy: +/ 0.5. Voltage AC: Max Range 600 V Accuracy: +/ 1.2. Current DC: Max Range 10 A Accuracy: +/ 2.5. Resistance: 2 MO Accuracy: 0.8. Diode Check. Continuity Test. Accessories Included: Test Leads 9V Battery. Dimensions: 5.91 H x 2.76 W x 1.89 D.

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.

1.9' LCD Palm-Size Digital Multimeter (Voltage + Current + Resistance + Temperature/ 1*6F22) $14.3 - Professional fully featured palm-size digital multimeter- It measures AC/DC voltage, resistance, diode check, temperature and etc.- Display: maximum reading 1,999- DC voltage: 200mV~500V (+/-0.5%+2)- AC voltage: 200V~500V (+/-1.2%+10)- DC current: 2000mA~10A (+/-1.0%+2)- Resistance: 200W~20MW (+/-0.8%+2)- Temperature: -40'C ~ 1000C (+/-1.0%+3) / -40'F ~ 1832'F (+/-1.0%+4)- Powered by 1*6F22 battery (included)- Comes with a pair of test leads and temperature probes

Maximum $11.99 Maximum

Analytic Systems Vtc 305/605 Dc Step Up Voltage Converters Dc/dc 24v45a 10.5 28v $949 Analytic Systems Vtc 305/605 Dc Step Up Voltage Converters Dc/dc 24v45a 10.5 28v . More voltage when you need it from 12 or 24 volt batteries Step up a 12V battery to between 13.5 and 17V or between 24V and 27.5V DC in 0.5V increments (via three-postiion DIP switch) or stabilize 12V or 24V power systems. Safety features include reverse input protection, low input voltage alarm, low output voltage alarm, over temperature shutdown and alarm, a dry contact alarm relay output and output overvoltage crowbar circuit. If the input voltage exceeds the regulated output voltage, the unit simply passes the voltage through with full LC filtering and a single schottky diode drop (0.5V DC or less). Applications include temporarily brightening 12V headlights or work lights, increasing voltage into an automotive or marine ignition system for hotter spark and/or prevention of failures due to voltage drop during engine start, stabilizing 12V and 24V DC power systems. Output Amps VTC305 = Input Volts/Out

Analytic Systems Vtc 305/605 Dc Step Up Voltage Converters 24v27a 10.5 28v $659 Analytic Systems Vtc 305/605 Dc Step Up Voltage Converters 24v27a 10.5 28v . More voltage when you need it from 12 or 24 volt batteries Step up a 12V battery to between 13.5 and 17V or between 24V and 27.5V DC in 0.5V increments (via three-postiion DIP switch) or stabilize 12V or 24V power systems. Safety features include reverse input protection, low input voltage alarm, low output voltage alarm, over temperature shutdown and alarm, a dry contact alarm relay output and output overvoltage crowbar circuit. If the input voltage exceeds the regulated output voltage, the unit simply passes the voltage through with full LC filtering and a single schottky diode drop (0.5V DC or less). Applications include temporarily brightening 12V headlights or work lights, increasing voltage into an automotive or marine ignition system for hotter spark and/or prevention of failures due to voltage drop during engine start, stabilizing 12V and 24V DC power systems. Output Amps VTC305 = Input Volts/Output Vo

Account limit of 2104 requests per hour exceeded.

Exiter With Reverse Diodes.mov

Calculate a suitable value (in ohms) of a limiting resistance?

a zener diode has a reverse breakdown voltage of 14 Volts,with a maximum load current of 70mA and an unstabilised supply voltage of 28 volts . Calculate a suitable value (in ohms) of a limiting resistance

I already answered this with a very detailed answer, repeated below, 2 days ago.

If you don't understand that, contact me.

What is the minimum and maximum voltage out of the supply? I'll assume 24 min, 32 max, you can change the numbers if you need to.

What is the minimum and maximum zener voltage? they are usually 5%, so that is 14.7, and 13.3 volts.

What minimum current do you want through the zener? A higher value will help regulation, but increase heat. I'll pick 10 mA.

Total current will be 80 mA
R = (24–14.7)/80 = 116Ω at worse case. Use 110Ω.
Assume 5%, so min/max is 104.5Ω and 115.5Ω

Current through resistor at low line, high zener, this is the min
I = (24–14.7)/115.5 = 80.5 mA

Current through resistor at high line, low zener, this is the max
I = (32–13.3)/104.5 = 179 mA

worse case power in resistor
P = I²R = 0.179²104.5 = 3.3 watts, use a 10 watt unit.

worse case power in zener
P = I²R = 0.179*14.7 = 2.6 watts, use a 5 watt unit. with a heat sink.

.