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In this video we do the 15th project from the Maxitronix Sensor Robot 20 (20in1) Electronics Project Lab Kit: Glass Organ.
We had some trouble getting this circuit to work. It turned out that the instructions omitted one necessary wire. After we added that the circuit worked.
The salty water and the clean water didn’t have hugely different effects. It was hard to get a resistance reading because the resistances seemed to just continually increase. In the end I didn’t really understand that.
The products I purchase from AliExpress in the video are these:
- 5Sets WH148 15mm 3 Pin Linear Taper Rotary Potentiometer Resistor 1K 2K 5K 10K 20K 50K 100KΩ Ohm For Arduino With AD2 White Knob
- DIY Project Starter Kit For Arduino UNO R3 Kit Electronic DIY Kit Electronic Component Set With Box 830 Tie-points Breadboard
We used the Rigol MSO5074 Mixed Signal Oscilloscope to inspect the output of the astable multivibrator.
We used the METCAL PS-900 Soldering Station to solder some jumpers onto a 10K potentiometer which we use to alter the frequency of the astable multivibrator.
We used the UNI-T UTi260B Thermal Imager to inspect the heat profile of the circuit. We see the resistors in the astable multivibrator get warm, along with other components.
We used the Fluke 17B+ Digital Multimeter to continuity test our point to point links, to test various resistances, to check for capacitance (there was none), and to measure the current draw. It was interesting to see the current draw increase with frequency.
We used the Riden RD6006 Bench Power Supply to provide 9V for the circuit. The RD6006 also reported current draw.
We used the Horusdy Soldering Station with Hot Air Gun. We used the hot air gun to shrink the heat shrink we used on the potentiometer jumpers.
We used the Brother P-Touch D210 Label Maker to label our salt jar.
The Goo & Adhesive Remover product I recommend is Goo Gone.
The cheap but excellent wire cutters I mention are these. I got a five pack for ten bucks.
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!
Fluke 17B+ Digital Multimeter |
Let’s go shopping!
