FRONT VIEW                                                   INSIDE VIEW
              

                LCD DISPLAY

SPECIFICATIONS

VOLTAGE:
    - Ajustable from 0 < 25 Volts at a resolution of 100 mV.

CURRENT:  choice of 4 ranges;
    - 0 < 1.000A at a resolution of 1 mA.  JP1 and JP2 open,            C1 = 2000uF filter cap.,   R7 = 0.5 Ohm,       T1 = 24V, 1Amp.
    - 0 < 2.000A at a resolution of 2 mA.  JP1 ground and JP2 open, C1 = 4000uF filter cap.,   R7 = 0.25 Ohm,     T1 = 24V, 2Amp.
    - 0 < 4.000A at a resolution of 4 mA.  JP1 open and JP2 ground, C1 = 8000uF filter cap.,   R7 = 0.125 Ohm,   T1 = 24V, 4Amp.
    - 0 < 8.000A at a resolution of 8 mA.  JP1 and JP2 ground,          C1 = 16000uF filter cap., R7 = 0.0625 Ohm, T1 = 24V, 8Amp.

2 lignes LCD display:
    - The top line shows the settings, the maximum current stays displayed at all times,
       it is not necessary to short the output terminals to set the maximum current.
    - The bottom line shows the measured values.
    - The arrows at the bottom center line show who is in control, the voltage or the current.
Ajustments:
    - Voltage, steps of 1 V and 0.1 V.
    - Current, steps of 1, 2, 4, 8 mA and 50, 100, 200, 400 mA depending on the Amp range.
    - Memorisation of the last settings before power off, restarting with thoses same settings.

CALIBRATION

LCD:
- Adjust P2 near ground for a nice contrast.

VOLTAGE:
- Adjust P1 for a supply of 5.12V.    
- Measure the voltage output terminals,  adjust P3 to for the same voltage reading on the PS LCD and the meter.

CURRENT:
     - Install a 10 Ohm resistor in series with an ammeter in series on the output terminals.
     - adjust P4 for a correct Amp reading on the LCD.

I recommand the use of a PIC16F876A, it is lower in cost and has a better EEDATA memory.

The source program in "C" and the object code (HEX) for the PIC16F876A is availlable alim_v3.zip.
All parts can be purchased from DigiKey.