Voltage Converter 12 V (step up) to 15-24 V Model GSK-820 This DC voltage booster circuit enables a 12 V DC source Testing to be converted (stepped up) to a higher DC output voltage. Connect 12 VDC power source with more than 10 A to circuit, LED1 and LED2 will light. Remove jumpers J1 through J4 Technical Specifications and measure voltage output OUT meter should read 15 V. n Power source: 12 VDC, more than 10 A Output voltage is managed by connecting a jumper wire to n Output voltages: 15 V, 18 V, 19 V, 20 V, 22 V, 24 V (selectable) obtain desired result. The next test requires jumping positions n Output current: max. 3 A 1 through 4 and taking readings to measure output voltage. n LED operational indicator Jumper J1, output voltage should read 18 V, remove jumper n Power source polarity protected and jumper J2, voltage should read 20 V, follow this procedure n PCB dimensions: 3.36 x 2.56 inches through J4 to ensure voltage output is correct. Voltage can be adjusted at VR1. Operating Principles Power source is checked for polarity before circuit will work. LEDs will turn on when polarity is correct and circuit is Recommendation working. Output voltage is set through a series of four When using this circuit, it is recommended to insert a 15-20 A jumpers (J1 J4), J1 18 V, J2 20 V, J3 22 V, J4 24 V. fuse at the 12 V position to protect against input power surge. Also, insert a 3 A fuse in the OUT position. If the circuit is to be used over an extended period of time, it is PCB Assembly recommended that a DC cooling fan be installed. Please refer to Figures 2 for aid in component placement. It is recommended to start with lower components i.e. diodes, resisters, electrolytic capacitors, and transistors. Be careful to Troubleshooting check polarity with Figure 3 before soldering. If a problem is The main cause of problems will come from misplaced detected, it is best to use a desoldering pump or desoldering components or faulty soldering. Utilize Figures 1, 2 and 3 braids to remove component. This will minimize potential to ensure proper placement, polarity and then check solder damage to the printed circuit board. points for connectivity. Figure 1 Voltage Booster 12 V to 15-24 V Circuit Electronic Kit Set for Hobby & EducationFigure 2 Connecting Circuits Figure 3 Installing components GSK-820 www.globalspecialties.com