I have a Proportional solenoid valve that uses a 0-30VDC for control (opening the orifice) I only have capability to provide 0-5V or 0-10V. I need to control the valve using my PC. Is there any DC Power supply device that I can control using PC to provide 0-30V (that I can change continuously as required during operation)? I have tried a voltage multiplier circuit. I am getting the required voltage but the Transistors (BC547) are burning out quickly due to over-current/heating.
I am not a electrical/electronics engineer hence don't know if there is a better transistor or how to choose one.