Hi all,
I am planning to use an LM629 to drive a DC motor .
Data sheets . Since this IC is to cost me 40 $ , I would appreciate if you could clear up some doubts before I invest so must money. Application example
figure 16 , page 23 shows a typical PWM circuit . Can this circuit be used for any DC motor voltage / rating [automobile wiper motor] . Are any modifications necessary.
0. I am not able to understand the instructions (number of inputs) required for motor control .
1. Suppose my input was through a pot, where must this data be input ?
2. My pot's centre voltage (~2.5v) , must provide no deflection of the motor shaft . Moving the pot to the left or right moves the shaft propotionately either direction . (Must the computer process the input to provide the output data ?)
3. If I am to interface this IC to a PC's parallel port , are the number of data lines sufficient ?
4. Can the circuit be modified for continuous monitoring (with minimal inputs from PC) ? ,i.e tying CS,RD - to respective voltage levels.
5. Is this a programmable IC ? (I do not understand the instruction set part, Are these input through the data lines ?)
6 . Beyond the PWM output stage , what other circuits are required to drive a DC motor? (If I'm not able to acquire LM18298 IC)
7. Will this work with home-made encoders ?. (tips on how to make one -please )
8. Can an intermediate IC (between PC and the LM629) be used to buffer / generate outputs and inputs , possibly a micro-controller (any suggestions ?)
9. Any ideas / circuits to the above effect would be accepted with immense gratitude ,
Thanks