Battery Charger Model GSK-819 This kit contains parts to assemble a Lithium-ion Polymer inserted correctly. If a problem is detected it is best too use a battery charger. These batteries are becoming popular with desoldering pump or desoldering braids to remove component. radio controlled devices, iPods , MP3, and laptop computers. This will minimize potential damage to the printed circuit board. Technical Specifications Testing n Power Source: 12-15 VDC, more than 600 mA Connect the power source, LED LSW and LED L5V should n Charge Current: 400 mA or 600 mA (selectable) light. Measure voltage at TP point and adjust voltage to 4.2 V n Charge: 1 to 2 cells using VR1K. Select charging current using SW1 (H = 600 mA, n Charge Indicator: LED L = 400 mA), select number of cells in battery using SW2 n Cut Off: Automatic cut-off circuit when battery fully charged (position 1 = 1 cell, position 2 = 2 cells). n Power source polarity protected n PCB Dimensions: 3.73 x 2.44 inches Connect Li-Po battery to charger at position OUT, LED Charge will light to indicate battery is charging. When Operating Principles battery is fully charged LED LSW and LED Charge will When power source is applied IC2 will regulate the voltage to a be off. Disconnect battery from charger and wait for the LED suitable amount for charging. Integrated circuits control the output LSW to turn on before trying to charge another battery. voltage, switch SW1 controls selectable charge current (H = 600 Charger will not charge until the LED LSW is on. mA and L = 400 mA), and switch SW2 controls the number of cells (1 cell 3.7 V) an (2 cells 7.4 V). When battery is fully charged Troubleshooting IC1 applies voltage to IC2 and initiates cut-off circuit. LEDs are on This circuit has only a few components. The main cause of when battery is charging and off when battery is fully charged. problems will come from misplaced components or faulty soldering. Utilize Figure 2 to ensure proper placement/polarity Circuit Assembly and then check solder points for connectivity. Please refer to Figures 1, 2, and 3 for aid in component placement. It is recommended to start with lower components Accessories i.e. diodes, resisters, electrolyte capacitors, and transistors. Use GSB-04 (sold separately) to house the PCB and batteries. Be careful to check polarity with Figure 2 before soldering. Take extra precaution to ensure electrolytic capacitors are iPod is a registered trademark of Apple Inc. Figure 1 Lithium-ion Polymar Charger Circuit Electronic Kit Set for Hobby & EducationFigure 2 Assembling circuit GSK-819 SW1: Select the current charging. L = 400 mA and H = 600 mA SW2: Select the number of cell. 1 = 1 cell (3.7 V) 2 = 2 cell (7.4 V) Resistors W Figure 3 Installing components R1, R26 150 brown green brown gold R3, R12, R16 2 k red black red gold R4 6 k blue gray red gold R9 3 k orange black red gold R10 300 orange black brown gold R11, R13, R19, R20, R23, R24, R30, R31 10 k brown black orange gold R14, R17, R18, R25, R27, R29 1 k brown black red gold R15 560 green blue brown gold R21 1 M brown black green gold R22 50 k green black orange gold Resistors W R2 500 green black brown gold R5, R6 2 red black gold gold R7, R8 1 brown black gold gold Potentiometer VR1 102 or 13 or 1 k Electrolytic Capacitors C , C4 470 F C3, C6 10 F C5 47 F Ceramic Capacitor C2 680 or 680 pF www.globalspecialties.com