| ??? 02/02/06 23:01 Read: times |
#109023 - Sure! Responding to: ???'s previous message |
Andy said:
The point is that a microcontroller may well turn out to be the cheapest way to do it even if you don't need the precision. Sure! Let me recall what Suresh originally wrote in his first post: Suresh said:
The operation of an existing unit is as follows:
The time(0 to 10 sec variable) is being set using a potentiometer arrangement. then, when a button is pressed(push button) the solenoid connected to the despenser at the o/p will be 'ON' till the time set is elapsed. From this description I concluded, that his application need no high precision at all and could easily be done by the help of 555. Would you use a poti if you need a high resolution and high accuracy? Why not using a simple 555, when all he need is the 'precision' of a simple potentiometer? Kai |
