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2 Comments
Zener diode allows current to flow in the forward direction as normal, but will also allow it to run in the reverse direction when the potential difference is above a certain value – the breakdown voltage known as the Zener voltage. The Zener diode specially made to cause a reverse voltage breakdown at a specific voltage. To get more information including for pcb and solder paste stencil you can visit soldertools.net
Hi,
I have need of a circuit for a specific function. Several drawings have convinced me that I am almost there but my lack of actual electronics knowledge is holding me back.
I need a circuit that will allow a dc power supply of between 4v to 16v (will be set to a more specific V at time of use) to power a load of about 3amp max. But the circuit needs to have a second power supply similar to the first which will automatically switch in and stay in when V on the primary power supply drops to a (adjustable) voltage, an indicator such as a LED needs to show that this has happened.
Can it be done? I have been thinking of Zener diode with a darlington pair driving a power mosfet, capacitor across output so that switchover is not seen by the load.
Many thanks,
Ian