In this post, we will finally look at the working Precision Current Source. We will assemble the device and calibrate it using a 34465A bench multimeter. Finally, I got this project almost to the finish line. I will tell you what is remaining. But for now, I am happy with how this project turned out. Precision Current Source Specification The…
Over-current protection is a type of circuit protection that stops your designs from releasing the magic smoke (getting damage). In some ways, most over-current protection circuits help with the over-voltage condition too. It's because as the voltage increases, the current draw increases too. What are our options for over-current protection? The simplest form of over-current protection is adding a current…
While working with precision sources, we have to consider its accuracy over its full usable temperature range. We will discuss potential ways of minimizing temperature drift due to trimmer potentiometer (POT). The accuracy of the current output depends on the values of the resistor ratio formed by the resistors. But using a trimmer potentiometer, we can overcome the total errors…
Most of us find ourselves in a situation where we need a precision current excitation source for one or the other sensors. The easiest way to have that is to use an ADC with a built-in current source. In these ICs, an internal voltage source generates the excitation currents. ADC measurements use the same reference voltage. So the drift in…
Ah! 2020 is coming to an end, finally. And I am back with update on my upcoming projects. It has been an exhausting year full of uncertainty, stress, and anxiousness. We all have plowed through it. As you may have noticed, there haven't been any posts since September. There are many reasons for it tough the most interesting one has…
