The layout stipulates a 9v Zener. I have some 9.1vs knocking around. Will a 9.1v do?
I assume it should be ok, but I'd like to know for sure as well. :)
Quote from: Haberdasher on July 14, 2010, 02:35:54 AM
I assume it should be ok, but I'd like to know for sure as well. :)
And me!!!
A 9.1v zener is fine. It just has to protect the input of the MOSFET from seeing more than its rated 20v Gate to Source breakdown voltage.
Much obliged, thankee. ;D
Just to repeat, I'm pretty sure a 9V zener IS 9.1V, as is a 5v is 5.1...
I'm pretty sure of this, but I could be wrong I guess. I'm just going by this: http://www.smallbearelec.com/Categories.bok (http://www.smallbearelec.com/Categories.bok)
Jacob
Quote from: jkokura on July 15, 2010, 04:25:19 PM
Just to repeat, I'm pretty sure a 9V zener IS 9.1V, as is a 5v is 5.1...
I'm pretty sure of this, but I could be wrong I guess. I'm just going by this: http://www.smallbearelec.com/Categories.bok (http://www.smallbearelec.com/Categories.bok)
Jacob
You might be pretty sure, but I'm positive ;) . A 9v1 zener is the beast you're looking for, as would be a 5v1 for a 5v.
Remember- this isn't the space shuttle you're building. .1 of 9v1 is 1% = well within tolerances.
I see there are some different 9.1v zeners for sale at various places I browse. Some are rated at 400mV and then others are 1 watt. Does it matter which ones we use?
It only matters when your power supply is greater than the wattage.
Jacob
Quote from: Haberdasher on July 15, 2010, 09:57:28 PM
I see there are some different 9.1v zeners for sale at various places I browse. Some are rated at 400mV and then others are 1 watt. Does it matter which ones we use?
The quick answer is no. 400 will more than cover it for what we are looking at. The long answer..?
(Sorry if I sound like I'm lecturing, but I teach in the music industry. It's nothing personal.)
The more involved answer asks you to look at all of your "bits". So, do you use 5% or 1% resistors? Carbon or metal film? What rating do you use for your electro caps- 85 degrees or 105 degrees? 16v, 25v, 50v, 100v, or 450v?
What is comes down to is "leeway". I choose to use 50v minimum caps. I believe it is better- but it is hard to prove definitively why. I also use 1% resisitors.
I believe that I have a better quality effect for using these components. I believe they are more rugged, able to cope with wear and tear better. But on the other side of the coin, 450v caps are probably over the top.
But I also include a voltage protection diode and power smoothing cap and resistor in every build I do, regardless of the schematic. (Pop over to www.muzique.com (http://www.muzique.com) and have a look; if Jack Orman says so, I think it's worthwhile listening to... ;) )
Remember what I said earlier, you're building an effect, not a space shuttle. You always have some room to move. So relax and enjoy building, and using, your effects. ;D
Or to put it another way- the day I need to find and use a 472.3k resisitor is the day I hang up my soldering iron.