http://xtronic.org Transmitter power amplifier schematic electronics stereo circuit diagram, schematic power supply circuit Mon, 30 Apr 2012 05:33:47 +0000 en hourly 1 http://xtronic.org/circuit/video-turorial-voltage-regulator-tutorial-usb-gadget-charger-circuit/ http://xtronic.org/circuit/video-turorial-voltage-regulator-tutorial-usb-gadget-charger-circuit/#comments Sat, 30 Jul 2011 07:01:07 +0000 Toni http://xtronic.org/?p=1396 This video covers the basics of linear voltage regulators – what they do, how to wire them up, and where to find them. Then I give a basic example of how to build a 5V supply that can be used to power USB powered gadgets. The LM341 and LM78MXX series of three-terminal positive voltage regulators [...]

]]> http://xtronic.org/circuit/video-turorial-voltage-regulator-tutorial-usb-gadget-charger-circuit/feed/ 2 http://xtronic.org/circuit/battery-charger-for-gelled-lm117/ http://xtronic.org/circuit/battery-charger-for-gelled-lm117/#comments Mon, 30 Mar 2009 04:15:00 +0000 Toni http://www.xtronic.org/?p=45 Circuit for battery type Gel Charger using lm117 Battery charging is another application uniquely suited for the LM117. Since battery voltage is dependent on electro-chemical reactions, the charger must be designed specifically for the battery type and number of cells. Ni-Cads are easily charged with the constant current sources shown previously. For float chargers on [...]

]]> http://xtronic.org/circuit/battery-charger-for-gelled-lm117/feed/ 1 http://xtronic.org/circuit/battery-charger-lead-acid-automotive/ http://xtronic.org/circuit/battery-charger-lead-acid-automotive/#comments Thu, 19 Feb 2009 21:44:00 +0000 Toni http://www.xtronic.org/?p=24 Circuit of charger of car batteries lead acid with the ic Lm317 That charger based on the integrated circuit LM317, regulator of adjustable tension, supplies up to 5 amperes to carry a potency battery in parallel with the regulator. The adjustment of the load current is made through the potentiometer P1. In the begin average [...]

]]> http://xtronic.org/circuit/battery-charger-lead-acid-automotive/feed/ 0 http://xtronic.org/circuit/batteries-charger-nickel-cadmium-ni-cd-e-ni-mh/ http://xtronic.org/circuit/batteries-charger-nickel-cadmium-ni-cd-e-ni-mh/#comments Thu, 19 Feb 2009 21:43:00 +0000 Toni http://www.xtronic.org/?p=20 Batteries charger of nickel cadmium (Ni-cd) and nickel metal hidret (Ni-MH) of high efficiency with regulator lm2756 for up to 3A. That charger has an overload protection, that circuit it is for being used with pack of batteries with 5 cells Ni-cd or Ni-MH (but it can be modified for other numbers of cells). The [...]

]]> http://xtronic.org/circuit/batteries-charger-nickel-cadmium-ni-cd-e-ni-mh/feed/ 0 http://xtronic.org/circuit/battery-charger-lm117-current-constant/ http://xtronic.org/circuit/battery-charger-lm117-current-constant/#comments Thu, 19 Feb 2009 21:32:00 +0000 Toni http://www.xtronic.org/?p=6 Two terminal current regulators can be made with fixed-output regulators; however, their high output voltage and high quiescent current limit their accuracy. With the LM117 as shown in circuit, a high performance current source useful from 10 mA to 1.5A can be made. Current regulation is typically 0.01%/V even at low currents since the quiescent [...]

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