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A crowbar circuit is an electrical circuit used for preventing an overvoltage or surge condition of a power supply unit from damaging the circuits attached to the power supply. It operates by putting a short circuit or low resistance path across the voltage output (V o ), like dropping a crowbar across the output terminals of the power supply.
Circuit diagram of a simple Crowbar circuit, with an 8V nominal output (7.6V with SD1). This page was last edited on 26 May 2021, at 12:49 (UTC). Text is available ...
Circuit Diagram of a simple Crowbar Circuit, with an 8V nominal output (7.6V with SD1). Date: 06/05/06: Source: Own work, made in Livewire and Inkscape: Author: jjbeard:
This will cause both an immediate drop in voltage (protecting the device) and an instantaneous high current which is expected to open a current sensitive device (such as a fuse or circuit breaker). This device is called a crowbar as it is likened to dropping an actual crowbar across a set of bus bars (exposed electrical conductors).
It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices. A wiring diagram usually gives information about the relative position and arrangement of devices and terminals on the devices, to help in building or servicing the device.
Power flows from left to right: The power supply (not shown) connects to the left-hand side of the diagram, and the protected device (also not shown) is connected on the right. Once the crowbar is tripped, the only way to reset it is to replace the fuse. 206.210.75.84 21:53, 6 March 2013 (UTC)
Forrest M. Mims III is an American amateur scientist, [2] magazine columnist, and author of Getting Started in Electronics and Engineer's Mini-Notebook series of instructional books that were originally sold in Radio Shack electronics stores and are still in print.
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.