voltage regulation : using PC ??

[hassenman]

HI Everybody .
i need to design voltage source that can be controlled from PC .
In other words , if i need 7 volts for instance , i have just to enter 7 in a program running windows ( i have to write this program too) .
the circuit should be connected to the Pc serial port for example .
Any ideas , links !!!

 

[alex.stoicescu]

You can use an ICPDAS module for Analog Output (www.icpdas.com) The module is I-7021 (one analaog output channel) or you can use I-7024 (with four analog output channels). I-702X costs about 200$ and you also gonna need an convertor (I-7561 USB <->RS485) because I-702X communicates on RS-485 and I guess you have an computer with RS-232 or USB ports. I-7561 costs about 100$. The programs can be written very easily, or you can use the Utility Software (DCON Utility from www.icpdas.com) to manualy input the desired voltage (-10V - +10V). I'm not sure about the resolution but it's at least 12 bits.

Best regards!