The title says it all.
Have found calculations for RC-networks, but they do not take the transistor into account. I have even tried bread-boarding a couple test circuits but to no avail..
What I am trying to accomplish: I want to apply 30VDC to one end, and on the other end, I want the voltage to go from 0VDC to the full 30 (a little transistor loss is fine) in about 5-10 seconds. I originally thought just a simple transistor, capacitor and resistor would do this.. but I am kinda at a loss.
This does NOT have to be linear.
My breadboard attempt started with a voltage divider network to get a full 5VDC (from the 30). Then, feed that 5VDC to a resistor/capacitor (rc network) that is attached to the base of an NPN transistor.. didn't work like I thought. Either this configuration will not work, or I just have to find the correct calculations.
Someone give me a pointer, I do not mind reading/learning... But I am sooooo close to handing this job to an Arduino.
Thanks!
Have found calculations for RC-networks, but they do not take the transistor into account. I have even tried bread-boarding a couple test circuits but to no avail..
What I am trying to accomplish: I want to apply 30VDC to one end, and on the other end, I want the voltage to go from 0VDC to the full 30 (a little transistor loss is fine) in about 5-10 seconds. I originally thought just a simple transistor, capacitor and resistor would do this.. but I am kinda at a loss.
This does NOT have to be linear.
My breadboard attempt started with a voltage divider network to get a full 5VDC (from the 30). Then, feed that 5VDC to a resistor/capacitor (rc network) that is attached to the base of an NPN transistor.. didn't work like I thought. Either this configuration will not work, or I just have to find the correct calculations.
Someone give me a pointer, I do not mind reading/learning... But I am sooooo close to handing this job to an Arduino.
Thanks!