Recently I found plugin for CadSoft Eagle PCB software. Together with freeware ray-tracing software POV-Ray it produces 3D images of PCB boards. It looks like nice illustrations for PCB assemblage instructions. You can see how your board must look like. Also, you can see proper colors of resistors…
Thermoregulated fan control board.
3D library is not full. So these generated boards are missing of components. In this image, you can see, that one power transistor and trimmer are missing.
Just few experiments in Mythbusters style. It is funny experiments with short circuits, high currents, flames and fumes. The voltage is lowered, but current is more than 200A.
The test device schematics looks like this: welding transformer with fuse and thermal protection on high voltage side. On lower side are rectifier, capacitor, voltmeter and shunt to measure current. The shunt is too weak for these experiments- the current is more than 200A.
The “schematics” before experiment:
The victim- 4 square mm copper wire with PVC isolation (~AWG 10…12).
This experiment is unfinished, as the copper wire didn’t melted- the automatic fuse box triggered and disconnected mains. This means, that the current in 230V side was much more than 25A for a long time.
Here is short movie of the experiment: XVid, 670kb. With sound. take a note how wires jumps from magnetic flux caused by high current.
Next experiment with thinner wire. It is about 1 square millimeter solid copper wire (AWG 16) with triple insulation. This special insulation is with filler to stop fire.
The wire melted near connector. The short movie of the experiment: XVid, 670kb. Highly recommended to see the movie with sound.
Ant the last experiment in this day. This is standard tape recorder’s mains cable. With power rating printed on the connector: 230V, 2,5A.
Interesting fact, that short time before destruction, this cable managed to pass 70A current…
Movie of the last experiment: XVid, 670kb, sound is mandatory for this movie. You must feel the power of the blast.
System: Windows XP Pro SP2, P4, PCIe system, Radeon X700 with dual output.
Image on single monitor. Please remember the image ratio.
When I move image to the left and the bigger part of the window is in the left monitor.
And I move the windows to the right. As soon, as bigger part of the windows is on right monitor, image jumps. But again, the image is squeezed.
The images are from DScaler, with overlay video. Something same is from media player too.
That’s me!
Do you notice spot on the roof. Why german make so low cars…
Here is flowers at my workplace.
I watter then twice during winter. On summer time all flowers are placed outside and must feed by themselves. All the cactus’s blossom regularly.