![]() | ![]() | ![]() |
| |||||||
| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
![]() |
| | Tools |
| | #1 |
|
hi I'm a new member here I need advice about how to manage a ADC0808 as a general ADC IC because i have a final task to make a teaching aid for mcs51 using ADC0808 as i know ADC0808 has several input and output. I still can't put it general enough i even confuse when reading the data sheet please be patient when help me thank you | |
| |
| | #2 | |
| Quote:
How many channels on the ADC do you want to use.?
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ | ||
| |
| | #3 |
| | |
| |
| | #4 | |
| Quote:
Ok, I'll post a circuit tomorrow. A point to understand is that the LM35 is 10mV/Cdeg, so that means a max of 1V at 100Cdeg. The ADC is 8bit [255] so the resolution will be about 1Cdeg.
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ | ||
| |
| | #5 |
|
it's correct the LM 35 have resolution 10mv/cdeg and max 150 c deg, so it will be 1.5V. thats why i use OpAmp to aplify it to 5V but since I didn't know the limit current for LM 741 noninverting input and the max output current of LM35 I only use a potensio at the output of LM 35 before input noninverting in LM741. these circuit suppose work in proper, after i find out the ideal resistance to sync LM 35 with LM 741 I 'll definitly exchange the potensio with fix film resistor, later. Thanks for the support it worth much for me | |
| |
| | #6 | |
| Quote:
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ | ||
| |
| | #7 |
|
I use ordinary two Power supply with +15 1 A and -15V 1 A
| |
| |
| | #8 |
|
I use ordinary two Power supply with +15 1 A and -15V 1 A did i need to increase the current supply? | |
| |
| | #9 | |
| Quote:
Power is OK. Look at this datasheet, pages 12/13, it gives a number of MCO to ADC examples,
__________________ Eric " Good enough is Perfect " I will NOT answer PM's requesting technical help, please use the Forum PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/ | ||
| |
| | #10 |
|
thanks for the pdf i'll take my time to read it first | |
| |
|
| Tags |
| adc0808, mcs51 |
| Thread Tools | |
| Display Modes | |
| |
Similar | ||||
| Title | Starter | Forum | Replies | Latest |
| adc0808 with 89c51 | rahulshah | Micro Controllers | 5 | 19th August 2009 06:24 PM |
| need help on adc0808 | plotoyee | General Electronics Chat | 13 | 7th August 2009 10:53 AM |
| ADC0808 problem | siau2 | General Electronics Chat | 15 | 18th October 2008 09:27 AM |
| Adc0808 | mnoman | Electronic Projects Design/Ideas/Reviews | 1 | 6th July 2006 02:35 PM |
| ADC0808 | ajayshankar | General Electronics Chat | 1 | 9th June 2005 10:52 AM |