hey folks!
i want to build a little prototype which does the following:
1) count up to 1 or 2 hours
2) sound a simple tone from a piezo
3) can then be switched of by a button and
4) starts from 1) again.
it should be:
1) as small as possible (with non expensive standard components)
2) therefor powered by a little battery cell
now i tried to research as much as possible about these topics and came to the maybe wrong conclusions that it must have some kind of microcontroller like the 555 or the pic PIC10F200 or any of its kind which is able to do a PWM. But then im a very much stuck on the details, because there seem to be many different versions of each of this MCUs and its hard for me to figure out how to build the circuit and which pins i need on the MCUs and which i dont.
If somebody could point me to the right directions of which MCUs are best suited for a task like this and generally where to start to get this circuit going it would help me a great deal and would me mucho appreciated!
Im sorry for being so general about me request and for my foreigners english.
cheers and thanks very much in advance,
julian
i want to build a little prototype which does the following:
1) count up to 1 or 2 hours
2) sound a simple tone from a piezo
3) can then be switched of by a button and
4) starts from 1) again.
it should be:
1) as small as possible (with non expensive standard components)
2) therefor powered by a little battery cell
now i tried to research as much as possible about these topics and came to the maybe wrong conclusions that it must have some kind of microcontroller like the 555 or the pic PIC10F200 or any of its kind which is able to do a PWM. But then im a very much stuck on the details, because there seem to be many different versions of each of this MCUs and its hard for me to figure out how to build the circuit and which pins i need on the MCUs and which i dont.
If somebody could point me to the right directions of which MCUs are best suited for a task like this and generally where to start to get this circuit going it would help me a great deal and would me mucho appreciated!
Im sorry for being so general about me request and for my foreigners english.
cheers and thanks very much in advance,
julian