All posts in the 'Power supply' Category
Posted on 21 Sep 2009
Plate batteries for old tube radios are today only available with difficulty. However, step-up controllers for low DC voltages are everywhere. The circuits of these IC’s are, however, affected by disadvantages and complex wound inductances are needed. A further disadvantage of this solution is the transducer frequency; poor placing can cause audible interference.[more]
Posted on 30 Mar 2009
This is a tiny USB battery charger.With this tiny thing you can charge almost all devices that are charged via USB, like iPods or mobile phones, with only two AA-Cells.most important compenent of the cicuit presented in the next steps is the “LT1301″. This is a small step up converter for to build switching mode power supplys with only a few external components.[more]
Posted on 26 Sep 2008
This circuit is suitable for a variety of uses. If you have a solar powered 12 Volt lead-acid battery power source, the circuit can be used to efficiently power lower voltage devices. It can be used to provide power to devices that normally use a set of small batteries for power. Common voltages such as 1.5V, 3V, 4.5V, 6V, 7.5V, and 9V can be produced by this circuit. The circuit has been used to power small fans, portable radios, a miniature TV, and more.[more]
Posted on 04 Sep 2008
This is a simple idea that can be added to your electronic project to help demonstrate applications of solar energy.Solar power provides advantages for remote locations where there is a need for power but no electricity available. For example, if you go to the mountains for a camping trip or to the beach for a day in the sun there are no electrical outlets to conveniently plug in to.[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]
