Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Diy voltmeter ammeter for hybrid car grid charger

Status
Not open for further replies.

vettesandinsights

Newbie level 1
Joined
Sep 28, 2016
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
24
I am currently ordering parts/building a grid charger for my 2000 honda insight hybrid. I already have what I need for the charger, just would like to have something built into the charger to monitor the voltage and amps of the circuit while charging. There are some meters I can buy on eBay that measure in the required range but I do not like how they look so I am looking for some input on how to make or modify a meter to look like the meter below. The meter will need to measure up to around 145-177vdc regularly, although while first setting up the grid charger it might have to read more, possibly around 190-200vdc a few times. As well, the current it will need to measure will be between 300mA-1.1A. I would like the voltage resolution of the meter to be 100mV (i.e. xxx.xV) and the current resolution to be 1mA(i.e. x.xxxA) It is not extremely crucial for the meter to read absolutely perfectly down to 100mV or 1mA, as long as it is linear/consistent because I am looking to see how the circuit acts when the batteries are getting close to full like when the voltage stops rising or how the current is changing toward the end of the charge.

My dilemma is that I do not like the look of the meters for sale, so my question is, would it be possible to modify an existing meter to change the display from a 7 segment led, to an lcd screen that looks like the one in the attached picture, or should I just make a meter from scratch using a microcontroller.

Any helpful input would be appreciated!
Thank you and best regards

100_1809.jpg
 

Why you cannot use the one shown in the picture? Most LCD panels will come with their made-for-each-other drivers and you will need to check carefully the position of the decimal point in the display.
 

The meter in the photo is an LCD type .
Then what is the requirement?

You can also buy digital meter modules for volt/ammeter.
That is to save time instead of starting from a microcontroller and programming...
 

If a device uses 7 Segment display and you want it to use LCD instead then you have to modify that devices' code. I will make a Meter for you. Wait for a day or two.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top