This is a collection of various useful and interesting schematics. Some of these are also referenced by or included in other documents at this site. What isn`t here (this may not be everything): * Extremely important safety information. See the document: ` Safety Guidelines for High Voltage and/or Line Powered Equipment `. Many of these circuits i
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nvolved high voltage and/or direct line-connected high power systems. Getting electrocuted could ruin your whole day. For really high voltage equipment, also see: Tesla Coils Safety Information. * Laser power supplies and other laser related schematics will be found in the document: "Lasers: Safety, Diode Lasers, Helium Neon Lasers, Drive, Info, Links, Parts". * Additional electronic flash and other strobe related schematics will be found in the document: " Notes on the Troubleshooting and Repair of Electronic Flash Units and Strobe Lights and Design Guidelines, Useful Circuits, and Schematics ". * Isolation and variable transformers (Variacs), homemade degaussing coils, series light bulb adapter, and other Incredibly Handy Widgets(tm) for your test bench will be found in the document: "Troubleshooting and Repair of Consumer Electronic Equipment" and possibly in the specific document for each type of equipment. * General nifty gadget and other pack rat stuff can be found in the document: " Salvaging Interesting Gadgets, Components, and Subsystems " which identifies useful components which may be removed from common consumer electronics and appliances as well as unconventional uses for their subsystems, modules, or replacement parts. * Schematics associated with the testing of capacitors, transistors and other semiconductor devices (includes simple curve tracer design), flyback transformers, etc. , will be found in the...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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