HPR4517: Cheap Yellow Display Project Part 4: The hardware

Hacker Public Radio

Hello, again. This is Trey. Welcome to part 4 in my Cheap Yellow Display (CYD) Project series. If you have hung in there with me so far on this journey, thank you. If you have missed earlier episodes, you can find them on my HPR profile page https://www.hackerpublicradio.org/correspondents/0394.html If you have questions, comments, concerns, or other feedback, please leave an episode comment, or drop me an email (Using the address in my profile). Even better, you could record and upload your own show which shares your viewpoint or expertise. To review, I finally have an actual project to build using the CYD. It is a portable, programmable morse code "Keyer memory" which can be connected to any of my HF transceiver radios by simply plugging it in to the code key input port. Then I could transmit stored messages by simply touching their specific icon on the touch screen. So, now I purchased a pair of CYDs. Each arrived in an anti-static zipper bag with a USB C cable, a 6 inch long 4 pin PB1.25mm to Dupont 2.54mm cable harness, a plastic case holding the CYD itself and a small plastic stylus. There are pictures in the show notes. Depending on how many IO connections I may need, and how I plan to power this, I am probably going to need more 4 pin PB1.25mm wired connectors. You can see a description of the various features and connectors on RandomNerdTutorials writeup about this board ( https://randomnerdtutorials.com/cheap-yellow-display-esp32-2432s028r/ ). The only difference I can see between this description and what I received is that mine have both a MicroUSB and USB C port. Of course, first thing, I had to plug it in and see what happens.