# zener diode

1. ### Why is shunt voltage reference not outputting the right voltage?

Hello, I have used LM4040C10IDBZR shunt voltage reference to produce 10V from +15V but it is actually outputting 9.4V? this voltage needs to be a stable 10v. to be honest I don't remember why I chose to put exactly 312ohm in there or if should i put a like voltage divider that makes 10v output...
2. ### Polarity switching and flyback question

I am working on a motor project and I have very large inductors that will possibly need flyback diodes, but my inductors also change polarity. So a regular diode would just create a short in the other direction wouldn't it? So how do I deal with that? Do I have two flyback circuits(one going...
3. ### this is to design a limiter circuit.. anyone know give your ideas...

the requirements are, The input signal of the limiter Vin is a sinewave having a maximum amplitude of 10V and a frequency of 60Hz. The input signal Vin is fed to the circuit through a resistor 500 ohm. and if Vin<=-9v , Vout = 10v and -9v<=Vin<=6v , 0v<=Vout<=10v and Vin>=6v , Vout = 10v are...
4. ### Zener Diode voltage regulation

Hi All, I have two designs using a zener diode for volatge regulation at 24V supply volatge. I like to know which is a better design to go with. Please see attach image. The load device is an active buzzer, that uses 15ma at 4v. Design #1: I have a shunt zener regulator using a resitor that...
5. ### Using a zener to protect a MOSFET?

I'm looking to use an optocoupler+MOSFET to switch "undefined" DC power sources; the opto I'm looking at is FOD817D and the MOSFET is FDPF55N06. The power sources may range from 5V (USB power) to 24V, but I could see this being used to switch as high as 36V at some point in the future, and...

7. ### Why is this zener-diode snubber slow/not working?

@crutschow, I have learned a lot from your comments on other Zener snubber posts and I kindly request your input regarding the selection of suitable diodes in the application below. I thought I had finally found a good Zener and diode that could withstand the high current of this inductor...
8. ### [SOLVED] Need to identify this Zener diode

Hello, Can someone identify this zener diode? Looks like its from ON Semiconductor. Thank you.
9. ### Dimmer Circuit Simulation Problem

Hi I am trying to make a dimmer circuit with proteus. But it is not working according to our calculations. I am very new both in proteus and also learning about OP-AMPs. So I am not understanding what's wrong with the schematics. Both the current and voltage is showing zero. Here is the...
10. ### Why did this zener diode explode?

Hello everyone. Please, help me to understand why D1 of the circuit below exploded when I increased the voltage to 32v. Everything was working perfectly at 22V, then I increased the voltage to 32v and D1 exploded. As you can see from the schematics, that diode drives nine N-Channel MOSFETS when...
11. ### Overvoltage protection circuit specification. Zener diodes... what wattage?

I'm awaiting guidance from mods as to where to post this question but i'm looking for help asap so hoping some kind soul can help me out. I am aware this has likely been answered many times so apologies for duplication. 1. I have a wind turbine whose output I am testing. 2. I am using a data...
12. ### Shunt voltage reference in feedback of integrator/opamp?

I have a common inverting integrators made using opamp (capacitor in negative feedback, +input to GND). I would like to have all these integrators saturate at the same exact voltage. Adding a zener diode in parallel to the cap works, but zeners are 2% tolerance at best and temperature dependent...
13. ### Dual supply from single 0v-24v input with zeners

I see some circuit exemples using oscilators (555 and 74HC14), and some others using isolated supplies or the ICL7660 IC. But all of them have the same problem, current. After some search on youtube, i come to THIS VIDEO , where Wagner uses this circuit: Using the simulations, it works...