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Hi, this is probaly not the right forum, I'll be grateful for hints on where to go, in element 14 or some other group/forum: As surplus from my old job I have an old HP5308A counter/timer that does'nt work and I'd like to fix it. I have manual and schematic for the HP5308A part of the instrument, and testing around it seems the problem is that the 10 MHz clock signal is dead. Unfortunately, the clock is generated in the top section, HP5300B, the measuring unit, and for that I have not been ab ...
This series of posts relates to the work of  jancumps and  peteroakes in their WIP Programmable Electronic Load  blog.   In this post I'm going to look at stability and the way we might get some measure of how good it is other than looking at the step response as I did in the earlier blogs. I did a post in the WIP blog on stability, so I'm repeating myself a bit, but it seems sensible to go through it again before adding a bit more about interpreting the features of the ...
This series of posts relates to the work of  jancumps and  peteroakes in their WIP Programmable Electronic Load  blog.   In the previous parts, I looked at the effect of changes to the control input. Now I want to look at the effect of holding the control input constant and varying the voltage of the output. That change of voltage will result in the circuit having to vary the resistance of the MOSFET, to compensate and bring the current back to the desired value, and t ...
Inexpensive, precise, stable and rugged, the most practical solution for RTD simulation: Bulk Metal Foil trimmed to the exact value of PT100 @ +125C, 147.952 ohms.    iNotes-quick webinar:  http://bit.ly/2xfpQrN   RTD Simulators – Product sheet: http://www.vishaypg.com/doc?63524   Resistor technical datasheet: http://www.vishaypg.com/doc?63255 ...
Platysen’s Seal is an analyzer that tracks your stats, swimming strength, and movements. Like other wearable tech, Seal works with a companion app (via Platysen)   Whether you’re a fitness enthusiast or a professional athlete, wearable tech proves to be a great tool. A bit more underused than I thought they would be by now. Keeping track of your stats lets you know what needs improvement and movement reminders let you know when it’s time for exercise. But if you’re ...
From a pen device that can determine cancerous tissue to health screening apps, more and more people are opting to go digital when it comes to healthcare. This pen-like device can tell you whether or not tissue is cancerous (Photo from University of Texas at Austin)   With so many initiatives and programs dedicated to staying healthy, more and more people are doing their best to keep a healthy and fit lifestyle. Whether it’d be getting enough exercise or adjusting your diet, it seems ...
Unfortunately my trusty old Rigol DS1052e oscilloscope suffered from damage on the way to the calibration laboratory. The control knob for the trigger level had been broken off and the calibration lab advised that they could not repair the device, so I asked for it to be sent back to me to see what I could do with it.   A search of the internet revealed some information on the encoders utilised within the scope as there had been a few posts on forums of failures of the encoders.   ...
Kepler-186f, first Earth-size distant planet found in an ‘inhabitable zone.’ (Image credit NASA)   Observing and studying distant planets traditionally requires the use of radio or refractive telescopes in order to gain insight of their composition and whether or not they could, or have supported life. Scientists have now made it possible to peer inside those planets for invaluable feedback concerning the material makeup of their interiors.   The Department of Energy̵ ...

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