All posts on August, 2008
Posted on 26 Aug 2008
This is a universal solar powered charger with minimal electronic knowledge and even less money. You make it out of one of those cheap universal car adapters and you can still use it as such afterwords. You can even change the panel you use whenever you want.[more]
Posted on 26 Aug 2008
This project utilizes a PIC microcontroller to monitor battery voltage and control a solid state relay, turning it ON for a time period when battery voltage falls below an adjustable low voltage set point and OFF if it exceeds an adjustable high voltage set point.The circuit is extremely useful in alternative energy applications such as wind or solar, which experience long periods of calm or clouds when no power is generated to feed the battery array.[more]
Posted on 26 Aug 2008
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]
Posted on 26 Aug 2008
The USB-powered Beagle Board is a low-cost, fan-less single board computer that unleashes laptop-like performance and expandability without the bulk, expense, or noise of typical desktop machines.It is designed by BeagleBoard.org.[more]
Posted on 25 Aug 2008
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]