UNIVERSAL BATTERY CHARGER K7302 g of r chargin s.
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.
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 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 LD... 17mm 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 7. DC Jack PCB 10mm M3 BOLT SK... + SW - Remark: even if the DC adapter jack is not used, it must be mounted, due to the internal switch. SK1 : DJ-005 8 T1 : BD135 Mount the transistor together with the heatsink on the PCB, bend the leads as necessary.
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.
Schematic diagram 11. Schematic diagram D1 +OUT IN+ 6.5...21VDC IN120/0...5W + SK1 R1 - C1 220µF/25V LD1 L-934LSRD RED 10 IN+ -OUT SW DJ-005 1.2...12V ACCU 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.
PCB 12.
VELLEMAN NV Legen Heirweg 33, B-9890 GAVERE Belgium (Europe) Modifications and typographical errors reserved - © Velleman nv. H7302IP’2 - 2014 (rev.