16x2....the application is a simple voltmeter, displaying the measured voltage from a sensor.What kinds of LCD,as a 20*2, 16*2?
What is your practical application?
i see. i understand. what would be the simplest MCU based solution then. can you suggest some links.its possible but doesnt make much sense. you need decoding IC or ICs
There is ICL 7107 which has 7seg driver for 4 digits.
NO info about the LCD.
How much voltage? More than 5v?16x2....the application is a simple voltmeter, displaying the measured voltage from a sensor.
no, less than 1 v.How much voltage? More than 5v?
My eyes, my eyes!
I was think and tried to introduce this kinds of led DVM, but since the TS want to measure less than 1V, so I give up for this, I got this one in hand and designed the circuit for measuring the voltage less than 3V, but not completed yet.You could just buy a complete DVM display using an LED display, they are really cheap and work straight out of the packet no additional wires required when measuring over about 3V, single additional supply voltage otherwise. eg. http://www.banggood.com/0_28-Inch-2_5V-30V-Mini-Digital-Voltmeter-p-974258.html
I just thought that this DVM could be using it as voltage monitor and put it with some other stuffs together.What about buying a cheap DMM - http://r.ebay.com/pYlNA8 for example - ripping the guts out of it and using that. I know it's got more functions than you want but in terms of time and materials probably cheaper than making your own.
I think you can measure below 1V on some units it's just a case of having a separate power supply for the display. I haven't bothered to search for one that does measure below 1V that's left up to the OP.I was think and tried to introduce this kinds of led DVM, but since the TS want to measure less than 1V, so I give up for this, I got this one in hand and designed the circuit for measuring the voltage less than 3V, but not completed yet.
its cool indeed. i need to interface with a A/D since my sensor signal is analog.You could just buy a complete DVM display using an LED display, they are really cheap and work straight out of the packet no additional wires required when measuring over about 3V, single additional supply voltage otherwise. eg. http://www.banggood.com/0_28-Inch-2_5V-30V-Mini-Digital-Voltmeter-p-974258.html
Detection voltage is from 2.5v - a bit too high for your less than 1v.0.28 Inch 2.5V-30V Mini Digital Voltmeter Voltage Tester Meter
Feature:
Detection voltage: DC2.5V ~ 30V
Working current: <30mA
Display: 0.28 inch LED
Dimensions: 31 × 12.0 × 9mm (length x width x height)
Installation hole: 23 × 10 mm
Measurement rate: ≥200mS / times
Accuracy: 1% (+/- 1 word)
Oh, that's great, I will tell my friend that maybe he can buy that kinds of the type next times, thank you.I think you can measure below 1V on some units it's just a case of having a separate power supply for the display. I haven't bothered to search for one that does measure below 1V that's left up to the OP.
adurino is a smart solution but need a bit of time and money.
by Jake Hertz
by Jake Hertz
by Jake Hertz