cybp

4 ms·

1. 1.▲
   by cybp 13y ago

   For those who have not seen it, this is based on SCMUTILS -- an open source symbolic manipulation engine, much like Mathematica or Maple. It is extremely powerful, and the book is worth reading just to understand the design patterns used th
2. 2.▲
   by cybp 13y ago

   AA batteries are a negligible risk when you touch metal with skin. That resistance is very high. Resistance inside your body is much lower -- 100 ohms is typical. If you were to get 0.5v between you arms, you could get unsafe currents. With
3. 3.▲
   by cybp 13y ago

   Skin resistance is quite low. You are thinking skin-electrode impedance. That is generally high enough to be safe, but with modern electrodes and luck, it can get somewhat low too. 5v 1k 5mA would not be unreasonable.
4. 4.▲
   by cybp 13y ago

   Good at lying with statistics. The plots don't say what the text does. Non-zero y axis makes tiny effects look big. Worst culprit are the age plots, which show retirees watching more tv than young'uns. It doesn't change over
5. 5.▲
   by cybp 13y ago

   You are incorrect. This circuit can potentially apply unsafe currents across the patient. A standard medical biopotential measurement circuit will have single-point failure protection to prevent conditions like this. This is required by sta