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What is it?

This unit provides 3 different voltages

  • 2.8V
  • 3.8V to 4.6V
  • 4.6V to 6.1V

This provides a comprehensive test of all the Z88's power functions, including 

  • current drain in the
    • operational and
    • coma states
  • and a check of the 'supercap' operation

This could be done with a commercially available adjustable power supply, These are either available as kits or as bench power supplies. Some of the items would need to have bought anyway, to connect the Z88 up to the power supply.

it was decided to see how easy it is to make this Item to test a Z88 in 2013.

Parts List

Section 3 of the manual has details on how to do a system test for the Z88. One of the items listed is a Special Test Box (with separate power supply). This is the item that is being built here.

The picture showing the Test Box on Page 3.3 shows a box with

  • input from the mains adapter
  • a meter
  • output to the Z88 power connector
  • output to the Z88 battery connectors

This is rather economical with the truth as the circuit on Page A.2 also shows

  • A Voltage output 3 position Switch SWA
  • A Supply Selector 2 position Switch SWB
  • A 2 position Switch SWC
  • A push to break Switch SWD

For more information about the case, switches and dummy batteries - see Design Considerations.

The parts are either mounted on the strip board, or are panel mounted on the case. This is marked as either S or E. Any tools that are required is marked with T.

The wire connections from the board to the external parts are terminated with 9 pins.

 
 
Qty

S or

Ex

Part
Description

Farnell

Part No

Cost

each

Min

Qty

Total

Cost

     

Universal AC/DC Adapter 1000mA

 3.4913.49

R1 (R9)

(R10) R18

(R5) R6

(R7) R17

4S1K (2%)

RESISTOR, METAL , 1K0, 0.25W, 1%

23302840.069100.69
R2R21S470R

RESISTOR, CARBON , 470R, 0.25W, 5%

23295310.013100.13
R3R1 1E68R

RESISTOR, CARBON , 68R, 0.25W, 5%

23295470.013100.13
R4R3 1S3R1

RESISTOR, METAL , 3R0, 0.6W, 1%

23301380.032100.32
R5 R8 R8 R112S4K7

RESISTOR, CARBON , 4K7, 0.33W, 5%

23296850.01510

0.15

R6 R7 R9 R102S470K

RESISTOR, CARBON , 470K, 0.25W, 5%

23295280.013 100.13
R11R4 1S2R2

RESISTOR, CARBON , 2R2, 0.33W, 5%

23296590.015100.15
R12R12 1S47K

RESISTOR, CARBON , 47K, 0.25W, 5%

23295320.013100.13
R13R13 1S1K8 2%

RESISTOR, METAL , 1K8, 0.6W, 1%

23300480.026100.26
R14R14 1S10K

RESISTOR, CARBON , 10K, 0.33W, 5%

23296090.015100.15
R15R15 1S1K6 2%

RESISTOR, METAL , 1K6, 0.25W, 1%

23298920.021100.21
R16R18 1S22K

RESISTOR, CARBON , 22K, 0.33W, 5% xxxx

23296440.015100.15
R17R16 1S2K7

RESISTOR, CARBON , 2K7, 0.25W, 5%

23295090.013  100.13
C1C11S470uF

CAPACITOR, 470UF, 10V

88234300.5110.51
C2 C3C4 C52S30nF

0.033UF, 50V, X7R, 10%, RADIAL

11003910.16 50.80
C4 C5C2 C32S0.1uF

0.1UF, 50V, Y5V, +80, -20%, RAD

23090250.02710.054
D1D11S1N4148

1N4148. - DIODE, 100V,150MA, DO-35

95651240.01610.016
D2D21SREF 50Z

LM4040DIZ-5.0 - IC, MICROPOWER, VOLT REF, 5V

94859700.5710.57
TR1 TR2 TR3Q1 Q2 Q33SBC184

BC237BG. - TRANSISTOR, NPN, 45V, 100MA, TO-92

95563890.10150.505
REG1U11SSGS L200

LM317LILP - V REG, 35VIN, 0.1A, 0.01%, ADJ, 3TO92

21443250.1810.18
SK1 1E2.1mm?

SOCKET, LOW VOLTAGE, 2.1MM, CHASSIS

12167260.39 10.39 
LEAD ASSY 1E2.1 MM

LEAD, DC EXTENSION, 2.1MM, 10M

12091791.8411.84
SWA 1E1 Pole 3 pos

SWITCH, SPDT On-Off-(On) 

94734832.05 12.05
SWB 1E4 Pole 2 pos

SWITCH, SOLDER TAG, 4PDT, ON-ON

15501924.7414.74
SWC 1E1 Pole 2 pos

SWITCH, SPDT, 2.0A, 250V

94733781.2411.24
SWD 1EPush to Brk

SWITCH, SPNC, MOM, 3A, 125VAC, PANEL

16346850.34 10.34 
     

RE520-HP - PCB, PROTOTYP. FR2, STRIPES, 2.54MM

11721543.1913.19
     

RE319-HP - PCB, EUROCARD, FR2, 2.54MM

11721074.0014.00
     

RE315-HP - PCB, EUROCARD, FR2, 2.54MM

11721403.6213.62
     

RE315-LF - PCB, EUROCARD, FR4, 2.54MM

11721426.4016.40
     4 x Battery Convertor Adapter Size AAA R03 to AA LR6+BoxE-Bay1.1911.19
     

PLUG, 4MM, FORK, RED, BUG

10114361.8811.88
     

PLUG, 4MM, FORK, BLACK, BUELA

10114352.3712.37
     A-2.401-R - TERMINAL, 4MM, RED1699022 1.62 1.62
     

A-2.401-B - TERMINAL, 4MM, BLACK

16990231.6211.62
     

RIBBON CABLE, 10WAY, PER M

12074171.3611.36
     

HEADER, RIGHT ANGLE, 10WAY

98383501.2211.22
     

SOCKET, IDC, 10WAY

5253642.1512.15
     

HEADER, RIGHT ANGLE, 20WAY

98383841.8611.86
     

SOCKET, IDC, 20WAY

5253902.9012.90
     

20WAY, PER M, 28AWG, 300V

12074202.3512.35
     

HEADER, STRAIGHT, THT, 14WAY

20647681.3011.30
     

SOCKET, IDC, BUMP & CLIP, 14WAY

30035890.8110.81
     

RIBBON CABLE, 14WAY, PER M

12074181.9311.93
     

WASHER, FORM A, BZP, M5

16239921.011001.01
     

M5 - WASHER, NYLON

12616551.231001.23
     

TRIMMER, POT, 560KOHM, 10%, 1TURN, TH

23285730.4910.49
     

SD506/0-15V - BATTERY CHARGE METER, 0-15V

44340793.1713.17
     Box    
     

ENCLOSURE, ABS, WHITE, 100X76X41MM

3013343.7213.72
     Pdf files    
Conclusion
  

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