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!
We use the UNI-T UTi260B Thermal Imager to examine the thermal characteristics of the circuit, particularly the 1K resistors getting warm.
We use the Riden RD6006 Bench Power Supply to provide 9V for our circuit and also to measure the current drawn by the circuit in its inactive (11mA) and active (12mA) states.
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!
We use the UNI-T UTi260B Thermal Imager to watch the thermal effects of the circuit. We see both the 1K resistors in the astable multivibrator get warm, but only the activated side of the bistable multivibrator gets warm.
We use the Riden RD6006 Bench Power Supply to provide 9V for our circuit. I make a mistake and connect it the wrong way around to begin with!
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!
We use the Rigol MSO5074 Mixed Signal Oscilloscope to see the output of the astable multivibrator. In the video I make a mistake and attach the probe to the wrong pins.
We use the METCAL PS-900 Soldering Station to solder the wires I use for the banana plugs I attach to the touch sensor an voice sensor (microphone).
We use the UNI-T UTi260B Thermal Imager to look at the heat profile of the circuit. We see that the low resistances (470Ω and 1KΩ) get the warmest, but the higher resistances (e.g. 10KΩ) are also slightly visible.
We use the Peak Electronic Design Atlas LCR45 LCR Meter to measure the resistance of the resistor we use in the LED attachment circuit. This extra circuit allows us to switch out the buzzer for an LED, which makes a lot less racket. The resistor it uses turned out to be 470Ω.
We use the Riden RD6006 Bench Power Supply to provide 9V for our test circuit. Usually I take a current reading to see how much power the circuit draws in its various states, but I forgot!
We use the Horusdy Soldering Station with Hot Air Gun for its hot air gun in order to shrink the heat shrink which we added to the banana plug cables we attached to our sensors.
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!
After we build the circuit we dump the sensor in a glass of water which causes the alarm to trigger. To avoid the obnoxious noise we put an LED in place of the buzzer.
Please be aware: while talking about this circuit I said that the astable multivibrator “flip flops” between states. And that’s kind of true in one sense, but I should be clear than an astable multivibrator is not a “flip flop” circuit. A flip flop circuit is a different type of circuit known as a bistable multivibrator, which is a different kind of thing. In this experiment we use an astable multivibrator to generate a 1.62 kHz square wave which provides our tone, we do not use a flip flop or bistable multivibrator circuit.
We use the UNI-T UTi260B Thermal Imager to investigate the circuit thermals. We see that the 1K resistors in the astable multivibrator generate the most heat.
We use the Fluke 17B+ Digital Multimeter to measure the voltage across Q5. Between about 500 mV and 750 mV is enough voltage to enable the output.
We use the Riden RD6006 Bench Power Supply to deliver the 9V DC required for the project. We use the current measurement from the power supply to see that when the LED is active the circuit draws about 23 mA compared to about 11 mA when the LED is not active.
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!
I made a few mistakes with the production of this video, sorry about that. I made a mess of the side branding, I will have that fixed in future. And I managed to get my toes on camera. The height of professionalism!
Note: in the video I’m not sure what “ROI” means, but it turns out it means “region of interest”. The region of interest is a box in the middle of the display, and some settings apply to this area.
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!
I saw this Hewlett Packard HP 8018A Serial Data Generator for sale for US $2,000 after having seen it mentioned over on Using a 1930 Teletype as a Linux Terminal. That sent me off trying to see if I could get my UTG962E from the UNI-T UTG900E series arbitrary function waveform generator to transmit a custom waveform. I managed to get the software installed on Windows and apparently I can upload any of *.sav, *.rec, *.dat, *.uwr, *.wfr, *.wf to my waveform generator, but I have no idea how to generate such files.
