Mail Call #51: Stamp Breakout Boards, DIY Telegraph Machine, PTZ Mount with Servos, and More!

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Silly Job Title: Lightning Tamer. I am the Lightning Tamer!

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

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Yum Cha A5 Cutting MatThis is an image of the product.

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Electronics Project #21: DIY Telegraph Machine | Learning Electronics In The Lab With Jay Jay

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Silly Job Title: Joule Juggler. I am the Joule Juggler!

In this video we assemble the Children’s Science Technology Small Production Diy Telegraph Machine in the Science Experiment Equipment Stem Education Model.

The instructions were easy enough to follow, given they are in Chinese! We get the two circuits working perfectly. Really impressed with this one, it works like a charm! Didn’t do any range testing or what not, I’m going to do this one again when my little people come to visit.

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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!

MROOFUL Carpenter Mechanical PencilThis is an image of the product.

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Module Monday #4: KY-035 Analog Hall Effect Sensor Module | In The Lab With Jay Jay

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Silly Job Title: Buzz Boss. I am the Buzz Boss!

In this video we take a look at the 1-10pcs KY-035 Analog Hall Magnetic Sensor Module 49E For Arduino.

You can learn more about the Hall effect which is basically a magnetism detector.

The code for this Arduino sketch is here: 2025-10-27-KY-035-analog-hall-effect.ino.

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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!

Damotk 5pcs Crevice Cleaning BrushThis is an image of the product.notes

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