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		3.49	1	3.49
R1 (R9) (R10) R18	(R5) R6 (R7) R17	4	S	1K (2%)	RESISTOR, METAL , 1K0, 0.25W, 1%	2330284	0.069	10	0.69
R2	R2	1	S	470R	RESISTOR, CARBON , 470R, 0.25W, 5%	2329531	0.013	10	0.13
R3	R1	1	E	68R	RESISTOR, CARBON , 68R, 0.25W, 5%	2329547	0.013	10	0.13
R4	R3	1	S	3R1	RESISTOR, METAL , 3R0, 0.6W, 1%	2330138	0.032	10	0.32
R5 R8	R8 R11	2	S	4K7	RESISTOR, CARBON , 4K7, 0.33W, 5%	2329685	0.015	10	0.15
R6 R7	R9 R10	2	S	470K	RESISTOR, CARBON , 470K, 0.25W, 5%	2329528	0.013	10	0.13
R11	R4	1	S	2R2	RESISTOR, CARBON , 2R2, 0.33W, 5%	2329659	0.015	10	0.15
R12	R12	1	S	47K	RESISTOR, CARBON , 47K, 0.25W, 5%	2329532	0.013	10	0.13
R13	R13	1	S	1K8 2%	RESISTOR, METAL , 1K8, 0.6W, 1%	2330048	0.026	10	0.26
R14	R14	1	S	10K	RESISTOR, CARBON , 10K, 0.33W, 5%	2329609	0.015	10	0.15
R15	R15	1	S	1K6 2%	RESISTOR, METAL , 1K6, 0.25W, 1%	2329892	0.021	10	0.21
R16	R18	1	S	22K	RESISTOR, CARBON , 22K, 0.33W, 5% xxxx	2329644	0.015	10	0.15
R17	R16	1	S	2K7	RESISTOR, CARBON , 2K7, 0.25W, 5%	2329509	0.013	10	0.13
C1	C1	1	S	470uF	CAPACITOR, 470UF, 10V	8823430	0.51	1	0.51
C2 C3	C4 C5	2	S	30nF	0.033UF, 50V, X7R, 10%, RADIAL	1100391	0.16	5	0.80
C4 C5	C2 C3	2	S	0.1uF	0.1UF, 50V, Y5V, +80, -20%, RAD	2309025	0.027	1	0.054
D1	D1	1	S	1N4148	1N4148. - DIODE, 100V,150MA, DO-35	9565124	0.016	1	0.016
D2	D2	1	S	REF 50Z	LM4040DIZ-5.0 - IC, MICROPOWER, VOLT REF, 5V	9485970	0.57	1	0.57
TR1 TR2 TR3	Q1 Q2 Q3	3	S	BC184	BC237BG. - TRANSISTOR, NPN, 45V, 100MA, TO-92	9556389	0.101	5	0.505
REG1	U1	1	S	SGS L200	LM317LILP - V REG, 35VIN, 0.1A, 0.01%, ADJ, 3TO92	2144325	0.18	1	0.18
SK1		1	E	2.1mm?	SOCKET, LOW VOLTAGE, 2.1MM, CHASSIS	1216726	0.39	1	0.39
LEAD ASSY		1	E	2.1 MM	LEAD, DC EXTENSION, 2.1MM, 10M	1209179	1.84	1	1.84
SWA		1	E	1 Pole 3 pos	SWITCH, SPDT On-Off-(On)	9473483	2.05	1	2.05
SWB		1	E	4 Pole 2 pos	SWITCH, SOLDER TAG, 4PDT, ON-ON	1550192	4.74	1	4.74
SWC		1	E	1 Pole 2 pos	SWITCH, SPDT, 2.0A, 250V	9473378	1.24	1	1.24
SWD		1	E	Push to Brk	SWITCH, SPNC, MOM, 3A, 125VAC, PANEL	1634685	0.34	1	0.34
					RE520-HP - PCB, PROTOTYP. FR2, STRIPES, 2.54MM	1172154	3.19	1	3.19

Z88 Cased Unit Test Fixtures

What is it?

Parts List