Lab Resistor Substitution Box – Part 4: Wiring the Switches

In this installment we'll wire up the six rotary switches. Each switch will be wired with 9 resistors so that we can select between 0 - 9 for each digit. Rather than try to describe the process with text, I'll let the video guide you through the wiring process. https://youtu.be/4H5iBpNmsZk Now just repeat that for … Continue reading Lab Resistor Substitution Box – Part 4: Wiring the Switches

Lab Resistor Substitution Box – Part 3: Drilling the Front Panel

Look what I’ve got... The parts for our Resistor Substitution Box are in.  I had two issues with the parts order, both related to the knobs. When the knob order arrived from Amazon, the envelope was empty. It was completely sealed all the way around, no rips or tears, but there was nothing in it. … Continue reading Lab Resistor Substitution Box – Part 3: Drilling the Front Panel

Lab Resistor Substitution Box – Part 2: Component Selection

Now that we have a completed design (see Lab Resistor Substitution Box - Part 1: Design), we need to select appropriate components so that we can begin building. First, we'll define some basic parameters (specifications)  that our components need to meet. Don’t order the knobs I recommend, they do not fit.  They should according to … Continue reading Lab Resistor Substitution Box – Part 2: Component Selection

Lab Resistor Substitution Box – Part 1: Design

Since our first few lessons covered resistors, and in at least one case demonstrated the utility of having a Resistor Substitution Box, that's what we're going to build for our first project. https://youtu.be/k5Fvy84lwG4 Introduction One of the most useful pieces of equipment in a hobby electronics lab is a good quality resistor substitution box. As … Continue reading Lab Resistor Substitution Box – Part 1: Design