Velleman K7302 Illustrated Assembly Manual
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Velleman K7302 Illustrated Assembly Manual

Universal battery charger
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UNIVERSAL BATTERY CHARGER
K7302
ILLUSTRATED ASSEMBLY MANUAL
H7302IP-1

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Summary of Contents for Velleman K7302

  • Page 1 UNIVERSAL BATTERY CHARGER K7302 ILLUSTRATED ASSEMBLY MANUAL H7302IP-1...

  • Page 2: Specifications

    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. ...

  • Page 3: Assembly Hints

    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. ...
  • Page 4 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!

  • Page 5: Charging Batteries

    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 bat- tery 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.
  • Page 6 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.
  • Page 7 Construction 1. Diode. Watch the polarity ! 3. Resistor 4. LED (check the polarity!)  D1 : 1N4007 R... D... CATHODE 10mm 17mm LD... CATHODE The value of resistor R2 deter-  LD1 : 3mm low current RED Resistor mines the charge current: 1/2W ...
  • Page 8 Construction 6. Electrolytic Capacitor. 8. Transistor 9. Mounting in an housing Watch the polarity !  The PCB can easily be mounted M3 NUT C1 : 220µF into our housing type G403. M3 LOCK WASHER M3 WASHER Due to heat dissipation, it is ad- visable to make some 4mm venti- C...
  • Page 9 Connection 10. Connection P7302 DC ADAPTOR RECHARGEABLE BATTERY ACCU P7302 RECHARGEABLE BATTERY DC POWER SUPPLY ACCU P7302 RECHARGEABLE BATTERY CIGARETTE LIGHTERPLUG ACCU  Connecting the supply voltage and the battery. See table on page 6 for suitable supply voltage...

  • Page 10: Schematic Diagram

    Schematic diagram 11. Schematic diagram +OUT 6.5...21VDC 1.2...12V ACCU 120/0...5W -OUT CHARGE CURRENT DJ-005 BD135 220µF/25V 50mA 47/0.25W 100mA 18/0.25W 200mA 6.8/0.25W 300mA 3.9/0.5W 400mA 2.7/0.5W L-934LSRD RED...
  • Page 11 12. PCB ACCU VELLEMAN P7302 VDC IN...
  • Page 12 VELLEMAN NV Legen Heirweg 33, B-9890 GAVERE Belgium (Europe) Modifications and typographical errors reserved - © Velleman nv. H7302IP’2 - 2014 (rev.1) 5 4 1 0 3 2 9 2 9 0 3 6 8...

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