The LCR meter I built and described in previous posts has some issues. In this post I’ll describe how I tried to solve them. Observed Issues Looking at the test…
An easy way for a user to update a device’s firmware is via its USB interface. Here is how a device can support this functionality. Overview By setting the logic…
When working on electronic circuits it is sometimes quite useful to be able to apply a precise voltage with only a few mA of current. If the required resolution goes…
In this episode I am going to talk about building the box. Building the…
In this part we will look at how to calibrate the decade capacitor and also see some measurement results. Calibration For the switching strategy described in the last post to…
This is a follow up project to my Programmable Decade Resistor project. This capacitor box can set capacitances from 20pF to 100µF in steps of 10pF. Overview When building the…
In this post I am going to talk about revision 2 of the PCB and show some test results. PCB Revision 2 Revision 2 of the…
Parsing SCPI commands is a rather involved task. Here I am showing how to perform two central steps: setting up a command table in a human readable form and performing…
As configuring the PLL is such an important part of the project I want to explain it in more detail. What I am going to describe here is specific to…
Having covered some of the theory in the last post I am now ready to design a concrete device. Designing a Device These are the features of the device I…