Category Archives for Products

PCF8574

The PCF8574 is a ‘remote 8-bit I/O expander’, a parallel I/O chip controlled over an I2C bus interface: see Figure 2. It comes in two variants, which differ only in their I2C slave address. In the case of the PCF8574 … Continue reading

13. February 2019 by sam
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Raspberry Pi Zero W

At approximately €25 / £10 / $20 (prices vary from country to country) the cost of the new Raspberry Pi Zero W may be double that of its basic predecessor but the higher price is fully compensated by its cordless … Continue reading

28. January 2019 by sam
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ESP32 Pico Discovery Board

The ESP32 chip is the big brother of the ESP8266: more SRAM memory, higher CPU speed, Bluetooth communication and a greater number of interface pins are just some of its features. Development boards such as the ESP32 Pico Kit make … Continue reading

14. November 2018 by sam
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Phantastron

Phantastron is a special multivibrator circuit with very precise timing invented during the Second World War. The Phantastron is a very clever circuit indeed, but I am sure that if its creator Alan Dower Blumlein had known about the Umac … Continue reading

18. July 2018 by sam
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Bosch XDK110 – Connected Devices and Solutions XDK

The Bosch XDK110 (Figure 6) has been on the market for longer, but nevertheless remains popular [5]. The high quality of the enclosure, accessories, circuit board and online infrastructure come at a price: around US$200. Bosch is recognized worldwide for … Continue reading

15. July 2018 by sam
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Texas Instruments SimpleLink SensorTag

For around US$30 you can be the proud owner of a TI SensorTag (see Figure 10) [9]. On unpacking the kit, first impressions are a little underwhelming: a matchbox-sized dongle in a rubber enclosure. On second glance, however, it becomes … Continue reading

15. July 2018 by sam
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Cypress Semiconductor solar-powered IoT device kit

If this kit [7], which costs around US$50, contained just a Cypress BLE module, there would be little to make it stand out from the crowd of IoT devices. Admittedly the module is a good example of its kind, and … Continue reading

15. July 2018 by sam
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STMicroelectronics SensorTile

STMicroelectronics (ST) has recently brought to market an very interesting kit called SensorTile [4], priced at around US$80 (Figure 4). The device is the size of a coin and is based on an STM32L476 microcontroller (Cortex-M4F, 80 MHz, 1 Mbyte … Continue reading

14. July 2018 by sam
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MikroElektronika and NXP Hexiwear

NXP (formerly Freescale) has of course produced its own Internet of Things development boards, but more interesting perhaps are the alliances it has formed with other manufacturers and with distributors, and it is of such an alliance that Hexiwear (Figure … Continue reading

14. July 2018 by sam
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Gleanergy Demonstration Kit

Semiconductor manufacturer Linear Technology has recently partnered with Würth Elektronik, experts in the domain of passive components and connectors, to create the Gleanergy Demonstration Kit (the ‘Gleanergy’ moniker is a portmanteau of ‘glean’ and ‘energy’), which costs around US$400: see … Continue reading

12. July 2018 by sam
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