Feb 15, 2021 · Toggle navigation rimstar.org. Science and Electronics Projects. What's New. October 28, 2024 : Added a new video about improvements to Izzy object selection and making Izzy more compact. February 25, 2023 : Added a downloadable files for making zoetrope animations and a downloadable template for making a pinhole camera from poster board.

Toggle navigation rimstar.org. 30kV DC Power Supply (homemade/DIY) using flyback and multiplier/tripler. This is my DIY high voltage power supply. It puts out up to 30kV DC and expects to be fed by a source giving 0 - 24V DC. The input is through banana plug connectors.

One formula for inductance is as follows: Where: L = inductance u r = relative permeability of the core material (air = 1) ; turns = number of turns on the coil area = the cross sectional area of the core in square meters*, including some of the coil as shown in the diagram

Toggle navigation rimstar.org. Electronic Symbols. Video - How to Read a Schematic. The following is an introductory level video for how to read a schematic. A list of symbols is given below. Electronic symbols. The following are electronic symbols used in schematics. Categories of the electronic symbols below; Power and ground: Switches:

Note that strictly speaking, this isn't actually a hologram. A hologram refers to a thing created using a specific process and involves the "use of laser, interference, diffraction, light intensity recording and suitable illumination of the recording" [from wikipedia].

Using multiple reflector angles. Solar box oven cookers cannot always be tilted to face the sun if the sun is low in the sky. Doing so may cause the cooking pot to tip over, or if the pot is on a swivel base, it may already be at it's maximum swivel angle.

Toggle navigation rimstar.org Make a razor blade diode A razor blade and a pencil can be used to make a diode for use with a crystal radio, or more popularly, the simpler version called a foxhole radio.

Crystal radios get their power from the radio signal themselves. There's no need to supply batteries or plug into a wall socket. I originally got into them to see how much power they could produce as part of my interest in non-conventional energy though I quickly abandoned that effort due to the low power output. But I kept playing with them anyway since I got such a buzz from hearing them ...

Toggle navigation rimstar.org. How to make a zoetrope. A zoetrope is a fun, educational, and easy to make animation experiment. Spin it and you see a animation appear before your eyes. See lower down on this page for pdf files you can download for making your own zoetrope and near the bottom for making your own animations.

Electric fly swatters (aka zapper rackets) are a cheap and easy way to get a high voltage power supply for some fun experiments. I've used one for powering a Franklin's bell as well as just making sparks. They cost only around $8 or 4 euros and can be found in many stores including Walmart, Home Depot and Maplin as well as online.