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Hulda Clark Liver Cleanse
Hulda Clark Cleanses



Hulda Clark Liver Cleanse
Hulda Clark Cleanses


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Published: 19 y
 
This is a reply to # 651,316

Latest zapper plans - cred


My first reply to you brought a very aggressive response from someone else. I don't think there was anything in my message content or tone which deserved it. My response was intentionally vague in some areas because I did not know your (or your friend's) experience level in electronics. However, I will try to address the points he made.

But first, something I forgot to mention. Mouser (www.mouser.com) started as a surplus dealer and grew up into a full blown industrial electronics distributor. Unlike Hosfelt, Jameco, and Digi-Key, Mouser remembers it roots, and still has no minimum order, no handling fees, and will sell to the general public. They are my favorite for projects like this. If you want, I will be glad to convert the parts list for whatever design you choose into a Mouser order list.

While I prefer analog circuit design (hence the handle), most of my design work over the years has been at least 50% digital. The analog stuff is way more fun because (relative to logic circuit design) it requires rational thought.

In fact, I did "go to school" on CMOS. Actually, it was a couple of day-long seminars. One was conducted by Frank Wanlass, who invented CMOS in 1963 (at Fairchild). The other was with Israel Kalish who developed the first CMOS chips in 1968 (at RCA). Kalish's team invented the 4069. Both of these guys were still very active in CMOS development in the late 70's when I met them.

I knew the part I wrote about static sensitivity might bug someone, so I called RCA and On Semiconductor (Motorola) before I wrote it. Here is a longer form of what I was trying to say. While U series CMOS logic does have some input static protection, it is a single stage network with no series element, and is very weak compared to B series and later generations. Relative to the 555 devices, it is about 1% as effective. Of more concern is the (lack of) strong static protection on the chip's output, since this is the part you will be touching. In this area the U series parts are significantly more delicate than later CMOS designs, and can't begin to compare to the toughness of a 555. Yes, the Zapper circuit output resistor does act as part of a protection network, but I still recommend using a part which is fundamentally more robust. If you want to stay with a CMOS gate type device, consider changing to a CD4093B (or MC14093B). 1000 times more robust, same price, and a trivial schematic change. I can describe the differences in a short message if you're interested.

Whether the weather... Rule of thumb for static electricity in the winter - if you can feel it, it's over 10,000 volts. If you walk across a carpet, touch a door knob, and feel a little zap, that's probably in the range or 10,000 to 50,000 volts. The current is so extremely low that there is no possible damage to you, hearing aids, pacemakers, or just about anything on or in your person. But part of the reason is that those devices are designed for such abuse. Most Zappers are not, and rely in the inherent survivability of the chip.

ak
 

 
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