Total solder points: 20 Difficulty level: beginner 1 2 3 4 5 advanced UNIVERSAL BATTERY CHARGER K7302 g of r chargin s. fo n to lu t so tterie Low cos d and NiMh ba iC both N ILLUSTRATED ASSEMBLY MANUAL H7302IP'1.
Features & Specifications Specifications: Charges Ni Cd or Ni MH batteries. Ideal for in car use. Transforms a mains adapter into a charger (adapter socket included). Charge cellular phone, toys, portables, video batteries … Selectable charge current. LED charge indication. Features: Charge current (±20%): 50mA, 100mA, 200mA, 300mA, 400mA. (selectable) Supply voltage: from 6.5VDC to 21VDC (depending on used battery) Supply current: same as charge current.
Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: A good quality soldering iron (25-40W) with a small tip. Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will protect the tip, and enables you to make good connections.
REMOVE THEM FROM THE TAPE ONE AT A TIME ! DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE. ALWAYS CHECK THEIR VALUE ON THE PARTS LIST! H7302IP'1.
Charging batteries Charging batteries Determining the charge current: Before building the kit, one must determinate how much current will be used to charge the battery or battery pack. It is advisable to charge the battery with a current that is 10 times smaller then the battery capacity, and to charge it for about 15 hours. If you double the charge current , then you can charge the battery in half the time. Example: A battery pack of 6V / 1000mAh can be charged with 100mA during 15 hours.
Charging batteries Determining the supply voltage : This table indicates the minimum and maximum voltages to supply the charger. Example: To charge a 6V battery a minimum supply voltage of 12V is needed, the maximum voltage is then 15V. Supply voltage Usable adapter Battery Voltage Min. Max. type 1.2V 6.5V 10V PS905 2.4V 7.5V 11V PS905 3.6V 9.6V 12V PS905 4.8V 10.5V 13V PS1205 6V 12V 15V PS1205 7.2V 13.2V 16V PS1505 8.4V 14.5V 17V PS1505 9.6V 15.6V 18V PS1505 10.8V 16.
Construction 1. Diode. Watch the polarity ! 3. Resistor 4. LED (check the polarity!) R... D1 : 1N4007 CATHODE D... 10mm 17mm LD... CATHODE 2. 1/2W Resistor R... R1 : 120 (1 - 2 - 1 - B - 9).
Construction 6. Electrolytic Capacitor. Watch the polarity ! C1 : 220µF 8. Transistor 9. Mounting in an housing M3 NUT M3 LOCK WASHER M3 WASHER C... HEATSINK TRANSISTOR METAL SIDE UP The PCB can easily be mounted into our housing type G403. Due to heat dissipation, it is advisable to make some 4mm ventilation holes into the housing. Holes for the adapter jack and wires will also be necessary. 7. DC Jack PCB 10mm M3 BOLT SK...
Connection 10. Connection P7302 DC ADAPTOR + - ACCU OUT VDC IN + P7302 DC POWER SUPPLY - - + + - RECHARGEABLE + BATTERY VDC IN ACCU OUT + P7302 CIGARETTE LIGHTERPLUG + RECHARGEABLE + BATTERY - + VDC IN - RECHARGEABLE BATTERY + ACCU OUT + Connecting the supply voltage and the battery. See table on page 6 for suitable supply voltage 9 H7302IP'1.
Schematic diagram 11. Schematic diagram D1 +OUT IN+ 6.5...21VDC IN120/0...5W + SK1 -OUT SW DJ-005 IN+ 1.2...12V ACCU R1 - C1 220µF/25V LD1 L-934LSRD RED CHARGE CURRENT T1 BD135 50mA 100mA 200mA R2 300mA 400mA R2 47/0.25W 18/0.25W 6.8/0.25W 3.9/0.5W 2.7/0.5W 10 H7302IP'1.
PCB 12. PCB ACCU OUT VELLEMAN P7302 R2 R1 SK3 + LD1 T1 C1 b D1 SK1 + SW - c - e VDC IN SK2 + - + 11 H7302IP'1.
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