Interfacing PMDC Motor to Data Port of Personal Computer

Table 1

Applied voltage levels.

SL No	Data applied				Voltages				Equivalent voltage theoretically	Voltage practically
	D3	D2	D1	D0	2.7 V	1.5 V	0.9 V	0.6 V
1	0	0	0	0	0	0	0	0	0	0.28 V
2	0	0	0	1	0	0	0	0.6	0.6 V	0.59 V
3	0	0	1	0	0	0	0.9	0	0.9 V	0.89 V
4	0	0	1	1	0	0	0.9	0.6	1.5 V	1.20 V
5	0	1	0	0	0	1.5	0	0	1.5 V	1.50 V
6	0	1	0	1	0	1.5	0	0.6	2.1 V	1.8 V
7	0	1	1	0	0	1.5	0.9	0	2.4 V	2.11 V
8	0	1	1	1	0	1.5	0.9	0.6	3 V	2.42 V
9	1	0	0	0	2.7	0	0	0	2.7 V	2.47 V
10	1	0	0	1	2.7	0	0	0.6	3.3 V	3.02 V
11	1	0	1	0	2.7	0	0.9	0	3.6 V	3.33 V
12	1	0	1	1	2.7	0	0.9	0.6	4.2 V	3.63 V
13	1	1	0	0	2.7	1.5	0	0	4.2 V	4.02 V
14	1	1	0	1	2.7	1.5	0	0.6	4.8 V	4.25 V
15	1	1	1	0	2.7	1.5	0.9	0	5.1 V	4.55 V
16	1	1	1	1	2.7	1.5	0.9	0.6	5.7 V	4.86 V