what is the application of germanium single crystal

Germanium single crystal, which is made from Ge metal, who can tell me the basic and newly developed application?

Topic by marvin jiang   |  last reply


AC187 Transistor Alternative???

Hi I was wondering if anyone knew of any Silicon or Germanium alternatives to the AC187 Transistor. Also is the BC548 or BC547 Silicon Transistor an alternative to the AC187 Germanium transistor?  Thanks in advance

Topic by Ikram1ali   |  last reply


How to make a fuelless generator? Answered

Can anyone make a more detailed tutorial of this http://www.youtube.com/watch?v=jz14eOgTKDY MATERIAL: 1. Four Germanium Diodes (1N34). 2. Two 100µF 50V electrolytic capacitors. 3. Tw0 0.2µF 50V ceramic capacitors. 4. Some kinda antenna The circuit plan is at the end of the video. Can anyone make a video and show the exact steps to create this? And If possible to on a larger scale. Thanks.

Question by Luna Ivanova   |  last reply


Perpetual motion & free energy is it possible? Answered

Hi Eric/Instructables, Basically I have been looking at perpetual motion and am led to believe that it is impossible due to the laws of thermodynamics meaning heat/energy has to be transferred somewhere, so I came up with a few designs which may challenge this theory.  Without wanting to reveal my designs and ideas too much I will explain what I am trying to accomplish and would love your opinion as to whether you think they are viable. I have 2 ideas, one is to use 'rare' magnets (which aren't rare at all so cost and obtaining them is not as hard as it sounds!) and have the magnets propelling round like a wind turbine design using the opposite poles effect to repel the magnets and get the turbine started.  Once the turbine is in motion I will harness the electricity created by the movement of the turbine/motor in a capacitor or kinetic store. This stored  electricity  can be used to keep the magnets magnetized by wrapping wire coils round the magnets and passing the stored current through the coil to keep the magnets repelling each other and spinning the turbine. Idea number 2 is a similar concept just dropping the use of magnets and using the method of so called free energy where you can get a small voltage from using a radio antenna, capacitors and germanium diodes (there are several example videos on the internet) again using a wind turbine effect to keep re-fueling the capacitors so the voltage drop when the load is applied is nulified. Perpetual motion is the dream and I think the transfer of heat/energy caused by friction can be harnessed and put back into the workings of the appliance/design, Many thanks for your time in reading this and hope for any replies positive or negative the dream will live on in my head and heart  :)  Mark Smith 

Question by McJesus   |  last reply