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Is it bad to use diodes to lower DC voltage?
In this case it should be fine, but diodes do not drop a fixed voltage; the voltage drop varies depending on current in a non-linear fashion. So for example getting 5V from a 12V source using 10 diodes in series would be bad, and the voltage could range from as much as 7V to as little as 2V, depending on the current draw.
How much voltage can I get from 10 diodes?
So for example getting 5V from a 12V source using 10 diodes in series would be bad, and the voltage could range from as much as 7V to as little as 2V, depending on the current draw. The 7805 has a minimum voltage of 7V to output 5V at 1 amp, so as long as you can guarantee this 7V you should be okay.
Can a 7805 be used as a reverse blocking diode?
Nevertheless, a stock 7805 should be just fine with a reverse blocking diode, and preferably a TVS to chop off any high (>30 V) transients. Additionally, always remember to fuse vehicle electronics.
Is there regulator for 60vdc in digikey.com?
Also, there is a new regulator on Digikey.com, the LM317HV handles 60VDC in at 1.5A output which can be adjusted from 2.5-57V with a couple of resistors. Your project sounds like fun! Thanks for contributing an answer to Electrical Engineering Stack Exchange!
What is the drop voltage of a diode?
Θja = 50°C/w for this diode, so at 0.5A and 1v drop you have 500 mW which gives a 25°C temp rise above ambient. Too hot to touch. You may need some current sharing resistance. From the diode V-I forward curve, a ΔI of 1/2 amp for a Δv of 0.1v gives 0.2Ω incremental diode impedance, so use 3 ea. 1Ω resistors.
When to use a fly back diode in a circuit?
A flyback diode is commonly use to eliminate sudden voltage spike when current drop across an inductive load. These kind of diode can be found close to relay, motor or sometime MOSFET. Flyback diodes are mandatory to protect the circuit, especially parts that are weak to voltage drop. First question here :
How are diodes used in an electrical circuit?
These diodes are typically used as a form of protection from unwanted or unexpected voltages. They have the ability of being put into breakdown mode and conducting excess energy into ground, saving a circuit that is not designed to handle those voltages.