All posts in the 'Power supply' Category
The idea presented here uses the analog-to-digital converter (ADC) and pulse-width-modulation (PWM) hardware in the PIC16C72 processor to implement an efficient, low-cost, regulating power supply.The supply is intended to source less than 10 mA with minimal ripple but can source as much as 40 mA if more ripple can be tolerated. Ripple also can be decreased by increasing the inductor and capacitor values if size permits, and by modifying the software feedback control.[more]
This is a High voltage regulated power supply for RF amplifiers project.It is an enhancement of the article by VE6AXW in July/Aug 1999 QEX by adding EMI filtering, included a programmable power on timer, and generated a printed circuit board layout.[more]
If you need a power supply that can deliver high currents to give a couple of example of possible uses; power source for an 12V car amp, cheap alternative for replacing your broken WLAN access point, flatbed scanner, printer, LCD monitor, or whatever -transformer. Or as in my case: a lab power supply.Consider converting one from an old PC.[more]
The schematics for this DC/DC converter is built around the UC3843 generic, low cost PWM controller. This very common PWM controller generate a duty-cycle modulated square wave ranging from 0 to 100%, at a user fixed frequency of 100KHz.Here are some features:
-Input voltage from 10V to 18V
-Output voltage from 20V to 28V adjustable
-Output current up to 5A for 3300mAh battery packs fast charge.
-Compact dimension (80×60mm)
-No heat sink or fan coolers even delivering up to 140W to the load.
[more]
This power supply module plugs straight into common bread boards, allowing you to cleanly and easily power your board with a wall wart plug or with wires into screw terminals. It features a variable voltage regulator that can be set to output 3.3 or 5V with a jumper, or any voltage if a potentiometer is added. The input has a rectifier that accepts AC or DC [more]
