1. 120v To 12 Volt Converter

Click to expand. Hey and How are you, what you need to do to convert 48 volts to 12 volts is to get a 12 volt regulater (LM7812), once you get the regulator test it out on a breadboard Instuctions: Stick the regulator in the breadboard this way.

CONVERTER TUTORIAL. DC Converters convert power from. Voltage of 24 volts, and a regulated 12 volt DC source is. Start circuits may need surge. CONVERTER TUTORIAL. DC Converters convert power from. Voltage of 24 volts, and a regulated 12 volt DC source is. Start circuits may need surge. DC to DC converter circuit diagrams. The circuit is a DC to DC converter using a standard 12 VAC center tapped power. Interfacing 5 volt CMOS to 12 volt/ 25. DC to DC converter circuit diagrams. The circuit is a DC to DC converter using a standard 12 VAC center tapped power. Interfacing 5 volt CMOS to 12 volt/ 25. 1-16 of 349 results for '48 volt to 12 volt converter'. 24V 48V to 12V Buck Converter, DROK Micro DC-DC Voltage Regulator Module 15-55V 36V to 12 V 1.5A 18W Step.

Then connect the positve Lead from your 48 volts power supply to the input put (The outer left pin) then connect the Ground or negative lead from the power supply to your The common pin of the regulator ( middle pin), and the outpin will produce 12 volts and 1 amp. It will be constant. Some major problems using an LM7812. The 1st is that the Maximum specified input voltage is 35 volts for a LM7812, and 40volts for the 7824 (24 volt version) so you would need a Pre-regulator, or some method to drop the input voltage down to a safe value for the regulator to operate. The next is (as hgmjr said) power dissapation.

Just getting a modest current flow is gonna turn the regulator and pre-regulator into heaters. Related to the above is efficiency. Going from 48 to 12 with a linear regulator means that 75% of your power is being wasted. (as heat.see above). You don't mention what current is required, or what the application is so it is hard to recommend what to use. My choice, for most higher current applications (with the exception of powering a sensitive radio reciever) would be Switch Mode regulation, which involves generating a square wave with a mark space ratio of 1 to 3 and lots of filtering (with perhaps some feedback to adjust the mark space ratio for voltage regulation).

120v To 12 Volt Converter

This would give good efficiency and low heat dissipation and potential for good current ratings (depending on design). The main dissadvantage is the potential for noise on the output.

Originally posted by Gadget@Mar 8 2006, 09:02 PM Some major problems using an LM7812. The 1st is that the Maximum specified input voltage is 35 volts for a LM7812, and 40volts for the 7824 (24 volt version) so you would need a Pre-regulator, or some method to drop the input voltage down to a safe value for the regulator to operate. The next is (as hgmjr said) power dissapation. Just getting a modest current flow is gonna turn the regulator and pre-regulator into heaters. Related to the above is efficiency. Going from 48 to 12 with a linear regulator means that 75% of your power is being wasted. (as heat.see above).

You don't mention what current is required, or what the application is so it is hard to recommend what to use. My choice, for most higher current applications (with the exception of powering a sensitive radio reciever) would be Switch Mode regulation, which involves generating a square wave with a mark space ratio of 1 to 3 and lots of filtering (with perhaps some feedback to adjust the mark space ratio for voltage regulation). This would give good efficiency and low heat dissipation and potential for good current ratings (depending on design). The main dissadvantage is the potential for noise on the output.

How to Size Wiring for Your System - The Manual Method Also see the Easier-to-Use. Properly sized wire can make the difference between inadequate and full charging of a battery system, between dim and bright lights, and between feeble and full performance of tools and appliances. Designers of low voltage power circuits are often unaware of the implications of voltage drop and wire size. In conventional home electrical systems (120/240 volts ac), wire is sized primarily for safe amperage carrying capacity (ampacity). The overriding concern is fire safety. In low voltage systems (12, 24, 48VDC) the overriding concern is power loss. Wire must not be sized merely for the ampacity, because there is less tolerance for voltage drop (except for very short runs).