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indicator. By changing the ON / OFF times this LED becomes a charging
status indicator! Use the following chart for an indication of what the doctor is
telling you.
POWER SUPPLY CONSIDERATIONS
The power supply used for the Dr. NiCad can very greatly depending on how
you set up your charger to work. While you may be able to “get away with”
many different types of supplies, what's recommended is a regulated 12-
14VDC supply capable of supplying at least 1.5 Amps of current
continuously. When using the doctor in the “field”, a 12 VDC car battery
works well as a power source. Be sure to remember that the center pin of the
input power connector, J3, should be connected to the positive ( + ) terminal
of the supply and the outer connector is attached to the negative, or ( - )
terminal.
THROTTLE UP !
With all our configuring steps behind us, it’s time to use the doctor!
1. Connect the battery (or batteries) to be charged to the +V (red) and -V
wires.
2. Connect the power input to the circuit.
3. Switch S3 to the “ON” position. The Status LED should come up in
either the “Fast Charging” mode or “Awaiting Command” mode.
4. To cycle the batteries, depress pushbutton switch S2. The Status LED
should display the discharging mode.
Once the batteries are discharging, Dr. NiCad will take it from there. The
conditioner will first discharge the cells to about .9 - 1.0 Volts per cell and
Charger Status Status LED “ON” time Status LED “OFF” time
No Battery No Light No Light
Battery Connected
Awaiting Command
1/8 sec. 1/8 sec.
Discharging 1 3/8 sec 1/8 sec.
Fast Charging Continuous N/A
Charge Complete 1/8 sec. 1/8 sec.`
Topping Off 1/8 sec. 1/8 sec.