Re: Can anyone recomend me for a uC + lcd +adc under 5$ @10
HI BOBCAT
At the beginnng of this year i did a design very close of your current needs .. I used a MSP430F413 cpu i goes for less than $3 in 1K pieces .
also i used a lumex LCD see www.lumex.com . they had a LCD display for $0.4 in 1k quantities .. they also can make the LCD according to your specs . but there is a one time mask fee (is not much)
Anyways i manage to buy LCD + CPU for almost $3.
If you don't require a very precise ADC the MSF430F allows it ,By using a built in comparatorsa and the timer is possible to mesure RESISTANCE,VOLTAGE and CURRENT is tricky BUT POSSIBLE !
See their app NOTES and examples ..
Otherwise in the same family of chips you can get another CPU with a real ADC converter. The MSP430F413 has LCD drivers for your needs
I have seen some OKI controllers in kitchen scales that are 4-bit, have ADC and LCD I/F. I am not sure they have any OTP's for this part.
If you can separate the 2 functions, LCD and uC, you can have a solution for a lot lesser. Many micros with ADC's cost anound $1.5 and LCD controllers should cost even lesser. So you can have a solution at $2.5