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Mail Call #49: Zener Dioes, TVS Diodes, Cables, and Channel News | In The Lab With Jay Jay

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This post is part of my video blog and you can find more information about this video.

You can support this channel on Patreon: patreon.com/JohnElliotV

Silly Job Title: Charge Charmer. I am the Charge Charmer!

In this video we take a look at what has arrived in the mail from AliExpress:

Also I announce the new video release program for the show:

Thanks very much for watching! And please remember to hit like and subscribe! :)

Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!

Pro’sKit MT-2207-C Analog VOM Handheld MultimeterThis is an image of the product.

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Module Monday #1: KY-010 Photo Interrupter Module | Learning Electronics In The Lab With Jay Jay

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This post is part of my video blog and you can find more information about this video.

You can support this channel on Patreon: patreon.com/JohnElliotV

Silly Job Title: Conductor Captain. I am the Conductor Captain!

In this video we take a look at the KY-010 Photo Interrupter. This module sets up a light beam and can detect when the beam is broken. We interface this module with an Arduino Uno after testing it with a simple circuit on the test board to figure out which pins are which. The pin labeled “S” is the signal, the pin labeled “-” is the negative or ground, and the middle pin is 5V VCC. The signal is high when the beam is interrupted and low otherwise.

There is more info about this sensor here: KY-010 Photo Interrupter Module at ArduinoModulesInfo.

Source code is here: 2025-10-06-KY-010-Photo-Interrupter.ino.

We use the Riden RD6006 Bench Power Supply to power our test circuits.

We use the EEVblog BM2257 Digital Multimeter to measure voltages.

We use the Kaisi S-160 45x30cm Repair Mat as our workspace.

Thanks very much for watching! And please remember to hit like and subscribe! :)

Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!

Yutiars Flat Paint BrushesThis is an image of the product.notes

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Taking information “out-of-band”

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Over in Intro to Data Oriented Design for Games, Nic Barker explains “taking information out-of-band”. Nic credits Andrew Kelly of Zig fame for introducing him to the idea (see Andrew Kelley Practical Data Oriented Design (DoD)).

The basic idea is that instead of having one list with items that have an enumeration with three different states, you can have three lists where membership implies the enum state, obviating the need to store the enum value in the item anymore, thus saving space and improving cache locality.