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DC to DC Converter mini Step up Voltage

Here is a DC to DC converter using a standard 12 VAC center tapped power transformer and a single bi-polar NPN transistor….

Here is a DC to DC converter using a standard 12 VAC center tapped power transformer and a single bi-polar NPN transistor. The circuit is not very efficient but will produce a high voltage usable for low power applications. The input battery voltage is raised by a factor of 10 across the transformer and further raised by a voltage tripler consisting of three capacitors and diodes connected to the high voltage side of the transformer. The circuit draws about 40 milliamps and should operate for about 200 hours on a couple of ‘D’ alkaline batteries. Higher voltages can be obtained by reducing the 4.7K bias resistor.

Original scheme edited by Bill Bowden, http://ourworld.compuserve.com/homepages/Bill_Bowden/

Be the first to comment - What do you think? Posted by admin - July 28, 2007 at 2:57 am

Categories: DC converter Tags: dc converter circuit, simple circuit, simple dc converter, step up dc converters

MAX756 2.5V-3.5V to 5V Step-Up DC-DC Converter

Build a circuit to boost the voltage of a DC power source using a MAX756 IC Chip
A DC voltage booster, DC voltage multiplier, or DC-DC Step-Up Converter is a very useful tool which enables a low source DC voltage to be boosted (stepped up) to a higher output DC voltage which is more useful.

For example, ultrabright LEDs need a 2.5-3.5 Volts to light: even two AA rechargeable batteries in series (1.2 + 1.2 = 2.4V) would not provide sufficient voltage to light up LEDs. Using a voltage boost circuit an LED can be powered by just one AA battery or any other power source – sometimes down 0.7 Volts!

This circuit can be used with low voltage solar panels to make a small battery charger or to power a 5 Volt device directly. It is also particularly good for getting useable voltages from small DIY stepper motor wind turbines – again to charge batteries or light LEDs.

Source : http://www.reuk.co.uk/DC-Voltage-Multiplier-Circuit-Plans.htm
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