Another one digital voltmeter on Atmega8

[DeepOne]

so, this is it -

 

[pradeep.g.belchada]

how much voltage can be measured vmin vmax dc or ac?

 

[DeepOne]

possible can be measured 0><25V DC, in accordance with scheme.

 

[DeepOne]

next version, with current (0><10A) measurement channel.

 

[pradeep.g.belchada]

thanks for your nice work. can you explain the functions of three switches? mode select, increase,decrease.and can we modify this circuit for higher current ratings and higher voltage.? like 230volt and 50 amp using 4 display with polarity
indication. i think it can be modified with using atmega 16. afterall keep posting this type of project

 

[DeepOne]

Hi.
it's for adjusting without divisors resistor selection, will allow to reduce or enlarge measurements results within 99 ADC points (from 1024).
Simple hold mode selection button, adjust first range of the voltmeter, once again hold and adjust second range, next hold - adjust ammetre channel, next - return to normal operation mode.
When see "L" - points will be subtracted, when "H" points will be added.

can we modify this circuit

I can not (because have lack of time), but you can modify it yourself if you want.

 

[mishu_g]

Hello !
nice work !

I wish to make this project but I have one problem: I can't see the pcb file.
Anybody help me ?

 

[pradeep.g.belchada]

see the post no 4

 

[mishu_g]

OK I undestand !
I supose the pcb file is vx2.dip .I can't open this file , *.dip extension is unknown for me.

mihai

 

[pradeep.g.belchada]

it can be opened using diptrace pcb softwre . free downloadable. at
https://www.diptrace.com