Velleman K7300 User manual

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UNIVERSAL BATTERY CHARGER / DISCHARGER
K7300
ILLUSTRATED ASSEMBLY MANUAL H7300IP-1
Total solder points: 205
Difficulty level: beginner 1 2 3 45 advanced
Automatic(dis)chargingofboth NiCdand
NiMHbatteries.

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Specifications:
Many battery chargers are available on the market, but few of them are universal chargers that can be used
for all battery types.
Using our kit, batteries of different voltages and capacities can be charged both quickly and normally. In
order to ensure that the battery is fully discharged prior to charging, an automatic discharger is also fitted.
Features:
 Charge current from 15mA to 750mA (selectable)
 Charges both of Ni/Cd and Ni/MH batteries
 Usable battery voltage: 1.2V / 2.8V / 3.6V / 4.8V / 6V / 7.2V / 8.4V / 9.6V
 Quick charge in 52 mins
 Normal charge in 14 hours
 Automatic discharge and charge cycle
 Usable mains adapter: 15VDC /800mA, type PS1508
 Dimensions: 85 x 78 mm
 Usable housing type: G311
Features & Specifications

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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. When solder rolls off the tip, it needs cleaning.
• Thin raisin-core solder. Do not use any flux or grease.
• A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they
cannot fly towards the eyes.
• Needle nose pliers, for bending leads, or to hold components in place.
• Small blade and Phillips screwdrivers. A basic range is fine.
For some projects, a basic multi-meter is required, or might be handy
1.2 Assembly Hints :
⇒ Make sure the skill level matches your experience, to avoid disappointments.
⇒ Follow the instructions carefully. Read and understand the entire step before you perform each operation.
⇒ Perform the assembly in the correct order as stated in this manual
⇒ Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.
⇒ Values on the circuit diagram are subject to changes.
⇒ Values in this assembly guide are correct*
⇒ Use the check-boxes to mark your progress.
⇒ Please read the included information on safety and customer service
* Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.
0.000

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Assembly hints
1.3 Soldering Hints :
1- Mount the component against the PCB surface and carefully solder the leads
2- Make sure the solder joints are cone-shaped and shiny
3- Trim excess leads as close as possible to the solder joint
REMOVE THEM FROM THE TAPE ONE AT A TIME !
AXIAL COMPONENTS ARE TAPED IN THE COR-
RECT MOUNTING SEQUENCE !

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Construction
 D1 : 1N4148
 D2 : 1N4148
 D3 : 1N4148
 D4 : 1N4007
 D5 : 1N4007
2. Diodes. Watch the polarity !
D...
CATHODE
 ZD1 : 6V2
 ZD2 : 12V0
3. Zenerdiode. Watch the
polarity !
CATHODE
ZD...
 R1 : 82 (8 - 2 - 0 - B)
 R2 : 47 (4 - 7 - 0 - B)
 R3 : 22 (2 - 2 - 0 - B)
 R4 : 18 (1 - 8 - 0 - B)
 R5 : 12 (1 - 2 - 0 - B)
 R6 : 10 (1 - 0 - 0 - B)
 R7 : 8,2 (8 - 2 - B - B)
 R8 : 6,8 (6 - 8 - B - B)
 R9 : 4,7 (4 - 7 - B - B)
 R10 : 3,3 (3 - 3 - B - B)
 R11 : 2,2 (2 - 2 - B - B)
 R12 : 3,3 (3 - 3 - B - B)
 R13 : 3,3 (3 - 3 - B - B)
 R14 : 100K (1 - 0 - 4 - B)
 R15 : 470 (4 - 7 - 1 - B)
 R16 : 2K2 (2 - 2 - 2 - B)
 R17 : 120K (1 - 2 - 4 - B)
 R18 : 15K (1 - 5 - 3 - B)
 J (2x)
1. Jumper wires 4. 1/4W Resistors R...  R19 : 22K (2 - 2 - 3 - B)
 R20 : 33K (3 - 3 - 3 - B)
 R21 : 47K (4 - 7 - 3 - B)
 R22 : 82K (8 - 2 - 3 - B)
 R23 : 150K (1 - 5 - 4 - B)
 R24 : 470K (4 - 7 - 4 - B)
 R25 : 10K (1 - 0 - 3 - B)
 R26 : 10K (1 - 0 - 3 - B)
 R27 : 3K3 (3 - 3 - 2 - B)
 R28 : 10K (1 - 0 - 3 - B)
 R29 : 10K (1 - 0 - 3 - B)
 R30 : 10K (1 - 0 - 3 - B)
 R31 : 10K (1 - 0 - 3 - B)
 R32 : 10K (1 - 0 - 3 - B)
 R33 : 1K (1 - 0 - 2 - B)
 R34 : 33 (3 - 3 - 0 - B)
 R35 : 1M (1 -0 - 5 - B)
5. 0,6W Resistor
R...
 R36 : 82 (8 - 2 - 0 - B - 9)

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Construction
 C1 : 47nF(473)

C2 : 47nF(473)
9. Capacitors.
C...
 RV1: 220K
6. Trim potentiometer
RV1
8. 1W Resistor
R...
2mm
 R37 : 270 (2 - 7 - 1 - B)
 IC1 : 14p

IC2 : 16p
7. IC sockets. Watch the
position of the notch !
 J1 : 2p

J2 : 3p

J3 : 8p

J4 : 8p

J5 : 12p

J6 : 12p
12. Pin headers
 R38 : 10
13. 10W resistors
R...
2mm
 DJ-005
14. DC- Jack
 T1 : BC557B
10. Transistor
 VR1 : LM385Z-2.5
11. Reference Diode
VR...

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CATHODE
 LD1 : Red
 LD2 : Green
Mounting into a housing :
Mount these LEDs through the
housing using the supplied hold-
ers and by extending the leads.
20. LEDs Watch the polarity!
 Accu (2p)
17. Terminal block
Construction
LD...
 C3 : 1µF

C4 : 10µF
15. Electrolytic Capacitors.
Watch the polarity !
 C5 : 1000µF
19. Electrolytic Capacitor.
Watch the polarity !
 T2 : BD237
16. Power transistor
C...
 SW1 : start
18. Push button
C...

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Construction
21. Power transistor
 T3 : BD676
10mm
M3 BOLT
M3
NUT
LOCK
WASHE
R
METAL SIDE
22. IC. Watch the position of
the notch!
 IC1 : CD4536
 IC2 : LM324
 Mount a shunt over the CAL connection.
 Mount a shunt over the 52 min selection (quick
charge setting).
 Mount a shunt over the 1.2V selection (charge a 1.2V battery).
 Connect a DC mains adapter of 15V/800mA (ex. PS1508).
Check that the "-" is on the outside edge of the connector.
 Turn the trimmer, RV1, to its mid position.
 Push the push button, SW1, the green LED should normally light up.
 After 12 seconds, the LED should go out. If this is not the case, then
adjust the trimmer. To the left reduces the time, to the right
increases the time.
 Remove the CAL shunt.
23. Adjusting the built-in clock.
14h52'
14h52'

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Connection
24. CONNECTION
Connect a battery to the ACCU + and - connection. One of
the battery holders from our range can be used such as:
• Type BH9V for 1 9V cell.
• Type BH322B for 2 AA cells (penlight).
• Type BH341B for 4 AA cells.
• Type BH363B for 6 AA cells.
• Type BH383B for 8 AA cells.
Type BH9V
Type BH322B
-
+
- +
DC adapter of 15V/800mA
(ex. type PS1508)

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• Mount a shunt over the 14h position.
• Select the battery voltage to be connected using a shunt on the 1.2V to 9.6V connection.
• Select the charge current with a shunt between 15mA and 750mA. The charge
current of a battery can be determined by dividing the battery capacity by 10 (then
select the closest to the charge current).
ex. : A battery with a capacity of 500mA/h should be charged with a current of
50mA, thus choose 55mA.
Push on the push button in order to start the cycle. If the battery is not yet completely discharged, then the red
LED will light up to indicate that discharging has started. Charging will automatically start afterwards for 14h.
25. USE WITH NORMAL CHARGE (14h)
Normal charge (14h)

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• Mount a shunt over the 52 min position.
• Select the battery voltage to be connected using a shunt on the 1.2V to 9.6V connection.
• Select the charge current with a shunt between 15mA and 750mA. The charge
current of a battery can be determined by dividing the battery capacity by 10
(then select the closest to the charge current).
ex. : A battery with a capacity of 500mA/h should be charged with a current of
50mA, thus choose 55mA.
Push on the push button in order to start the cycle. If the battery is not yet completely discharged, then the red LED
will light up to indicate that discharging has started. Charging will automatically start afterwards for 14h.
26. FAST CHARGE (52 mins)
Fast charge (52 mins)

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NOTE:
 Only use the quick charge facility in the event of an emergency, as this type of charging can reduce the
battery lifetime.
 Never mix batteries of different capacities.
 Never select two voltages or current settings simultaneously.
Fast charge (52 mins)

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27. PCB layout.
PCB

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28. Diagram
Diagram

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Modifications and typographical errors reserved
© Velleman Components nv.
H7300IP - 2005 - ED1
VELLEMAN Components NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com
5410329 289881