Category Archives for Products

DSO150 Oscilloscope Module

As mentioned above, as I was rootling around on the manufacturer’s website [1] I noticed the DSO150 oscilloscope kit (see Figure 2). This device is a development of the DSO138, using the same display and microcontroller. However, this model is … Continue reading

10. June 2019 by sam
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DSO138 Oscilloscope Module

As Figure 1 shows, the DSO138 module consists of a circuit board with a color LCD attached. Soldered to the board are all the user controls (slide switches and pushbuttons) and sockets for signal input and power. On the left-hand … Continue reading

10. June 2019 by sam
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The PGA2311

For those who are interested, in Figure 3 we have drawn the internals of the PGA2311. It is immediately clear that we have two (because it is stereo) amplifiers, the amplification of which are set by a set of (serial) … Continue reading

10. June 2019 by sam
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Keysight 33522A Function Generator

We have there are no issues of importance with the reference device. This signal generator is what it sets out to be and it functions in the same way too. However, for professional equipment of this rank you should expect … Continue reading

10. June 2019 by sam
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Rigol DG1032Z Function Generator

This comes with a ‘Quick Guide’ but no CD. The ‘proper’ operating instructions are of course downloadable from the Rigol website and there is even a German version. Plus point: the fan noise is moderate. At around €560 / £520 … Continue reading

10. June 2019 by sam
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Siglent SDG1032X Function Generator

This time the user instructions do match up with the actual device, thank goodness. Once again the fan noise is definitely audible, even if not nearly as intrusive as on the PeakTech. In price terms, at around €450 / £420 … Continue reading

10. June 2019 by sam
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PeakTech 4125 Function Generator

The operating manual supplied on CD clearly relates to an older version of the device (Figure 1). The front panel of the newer version in fact has a USB connector for an external hard drive. On the other hand the … Continue reading

10. June 2019 by sam
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Optocouplers

Sometimes circuits need to be isolated from each other for safety reasons, noise reduction or even to simplify a circuit function. An early classic example is e photoresistor that Gibson and Fender used to add a tremolo effect in early … Continue reading

01. June 2019 by sam
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RV-8523

The RV-8523 is a real-time clock (RTC) with 20 registers each eight bits wide. The registers, numbered from 00H to 13H inclusive, are listed on the right in Figure 4. The RTC has an internal supply voltage monitor and can … Continue reading

13. February 2019 by sam
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LM75

The LM75 is the de facto standard temperature sensor with an I2C connection. Of the seven bits of its address only the upper four are fixed (at 1001); the other three bits can be set using external circuitry. Up to … Continue reading

13. February 2019 by sam
Categories: Components | Comments Off on LM75

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