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Schematic- and PCB design programs
Thanks, I'll try that.
Thursday, 29 January 2015 - 10:41
Schematic- and PCB design programs
Good work Ilija, looks promising. I make the PCB's myself and I need to print the high resolution negative on transparency. Can this be done in AutoTRAX?
Thursday, 29 January 2015 - 07:32
DC Ammeter and Math with Atmel
well, from your circuit, if Vcc changes from 5v to 5.1V, the difference in voltage drop on the resistor would be less than 1mV. You can simulate this and see the changes. Don't...
Wednesday, 12 November 2014 - 18:15
DC Ammeter and Math with Atmel
I wouldn't worry about that because if the  5v changes the measured value would go in the same direction and the voltage difference would not change very much.
Wednesday, 12 November 2014 - 17:51
DC Ammeter and Math with Atmel
So, basically you want to know the maximum current you can draw from your power supply by increasing the load. Don’t like the word “impossible”, but it is near to that. If the PS...
Wednesday, 12 November 2014 - 09:18
DC Ammeter and Math with Atmel
You might want to have a look at ACS712 current sensor.
Tuesday, 11 November 2014 - 21:30
DC Ammeter and Math with Atmel
USB_Current = (5V - USB_ADCConverted) / 0.02
Tuesday, 11 November 2014 - 20:59
DC Ammeter and Math with Atmel
USB_ADCConverted = (USB_ADCRead * 5) / 1024 'Ohms Law used to find current draw for the power sources USB_Current = 5V - USB_ADCConverted / 0.02
Tuesday, 11 November 2014 - 20:58
DC Ammeter and Math with Atmel
It is obviously not a best idea to draw a VCC pointing down. It confused you all.
Tuesday, 11 November 2014 - 20:46
DC Ammeter and Math with Atmel
your schematics is OK, your simulation is OK, ADC reading is OK, you only for current calculation should take the voltage drop on the resistor, not the voltage after it. Cheers
Tuesday, 11 November 2014 - 20:01