In this episode Shahriar takes a look at an unusual vintage HP instrument from the 1950s. The unit has a vacuum-tube-like core with a pair of banana plug interface.
After restoration, the instrument principle of operation, teardown and schematics are presented. Several experiments demonstrate the use-case as well as the correct operation of the unit.
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In this episode Shahriar takes a look at a pair of COVID-19 electronic home kits. These Bluetooth enables devices are manufactured by ellume. Both of these tests had produced false-positive results. The optical readout mechanism of the devices are examined as well as the general design of the unit.
This video is not about which COVID-19 home test kit you should purchase. This is an exploration and analysis of this particular device for educational purposes only. For all medical advice regarding COVID-19, please contact your doctor.
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In this episode Shahriar reviews an ambitious new CNC machine currently offered on Kickstarter. The machine is equipped with automatic tool changer, automatic probing & leveling, built-in dust collection, optional fourth axis and integrated laser engrave module. The review of the pre-production model focuses on the units capabilities along with high-precision PCB experiments. You can access the Kickstarted campaign here:
This review is organized as follows:
00:00 – Introductions and expectations
01:22 – Machine overview, constriction, tablet holder, work area
03:23 – Automatic tool changer design & operation
04:30 – Automatic probing and leveling system
06:11 – Movement mechanism, precision & accuracy, built-in laser, z-axis
09:37 – Optional fourth axis module
10:23 – Included accessories, bit changer tool, collet tool
10:56 – Built-in dust collector
11:33 – CNC interface software, G-code, features & work flow
15:03 – High precision measurement of the x-axis accuracy & repeatability
17:34 – 3.5GHz filter design from Gerber to G-Code, CNC operation
21:18 – Filter PCB and high precision examples after CNC, microscope view
23:23 – Filter measurements & comparison with simulation
24:27 – Homemade oil-bath for FR4 CNC dust protection
24:56 – Manufacture example of PCB with solder-mask
25:38 – Laser engraving example of photo-realistic sample
26:32 – Automatic level & laser engraving of soft materials
27:55 – Conclusions & future plans
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In this episode Shahriar reviews the Analog Discovery Pro 3000 Series, particular the ADP3450 model. The instrument offers a combination of mixed signal oscilloscope and dual-channel arbitrary waveform generator. The WaveForms free software can be used to perform a wide range of measurements. You can find more information about this product at:
https://digilent.com/shop/analog-discovery-pro-3000-series-portable-high-resolution-mixed-signal-oscilloscopes/
The review is organized at follows:
00:00 – Introductions
00:35 – Instrument overview, functions, specifications and design
04:53 – Detailed teardown and architecture overview
11:17 – WaveForms software, oscilloscope capabilities, catching glitches, trigger functions
19:18 – Mixed-Signal measurements, logic analyzer, cross-domain triggering
22:19 – Serial decode, digital trigger, correlated measurements
24:03 – Waveform generation, synchronized signals, modulations, sweeps, FFT, 3D spectrogram
28:46 – Network analyzer functionality, measuring linearity and frequency response of DUT
33:42 – Impedance analyzer functionality, measuring complex impedance across frequency
36:29 – Additional capabilities, tracer, scripting, etc.
37:39 – Concluding remarks
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In this episode Shahriar takes a close look at the design and architecture of an Agilent USB Power Sensor. The principle operation of different power detectors is presented alongside various block diagrams and schematics. The teardown of the power sensor reveals the system components from the integrated sensor MMIC to the ADI BlackFin DSP core. The detector is further examined under the microscope and the dual-diode detector design is presented.
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