Category Archives: Products


High-voltage seven segment LED display driver with SPI interface

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Seven segment LED displays are known to be resource and power hungry. But because they are visually so charming and readable from a far viewing distance and at a much wider viewing angle as compared to any other electronic displays, they are still hugely popular. The required number of I/O pins to drive the LED segments can be reduced significantly by using an additional dedicated hardware. For example, the MAXIM’s MAX7219 device allows you to interface 8 pieces of seven segment LED modules using only 3 I/O pins of Arduino or any other microcontroller. You can find details on the

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New power supply boards added to our Tindie store

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We have added two new regulated power supply boards and one general purpose double-sided prototyping circuit board (7cm X 9cm) to our Tindie store today. Both the power supply boards provide constant 3.3V and 5.0V power supply derived from an unregulated DC input ranging from 6.5-12V. One is designed to serve power supply for a breadboard circuit whereas the other one can be enclosed within the project box along with the project circuit board. The boards are designed for low power applications (600 mA). The breadboard version can be powered either from a DC wall wart or 9V battery (connector

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SPI7SEGDISP4.40-1R LED displays are back in stock

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SPI7SEGDISP4.40-1R is a serial 4-digit seven segment LED display based on MAXIM’s MAX7219 device. This display module can be interfaced with any microcontroller that has 3 I/O pins available. If the microcontroller features a built-in hardware SPI, then the display module can be interfaced as a SPI slave device. In that case the SPI signal lines SDO (serial data out), SCLK (serial clock), and SS (slave select) from the microcontroller can be directly connected to the DIN, CLK, and LOAD pins labeled on the display module. CS is active low signal. In case the host microcontroller doesn’t have a hardware

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Weekend offer: 30% OFF on 8-digit (double row) SPI 7-segment LED displays

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We are offering 30% OFF (coupon code BDEA254) on SPI7SEGDISP8.56-2R this weekend (May 31 – Jun 2, 2012). SPI7SEGDISP8.56-2R is a MAX7219-based seven segment LED display board with 8-digits which are arranged in two rows of four. The MAX7219 allows you full control of all the digits and decimal points through three I/O pins of a microcontroller. The communication interface is SPI-compatible, and the brightness of the LED segments can be controlled through software. Key Features: 3-wire SPI interface double row of 4-digit displays (0.56″) operates at +5V supply individual control of all digits and decimal points 16 levels of

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Easy Pulse Sensor is now also available from Elecrow

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Easy Pulse, a DIY pulse sensor based on the principle of photoplethysmography, is now also sold by Elecrow, our China-based collaborator, for only $18.50 and ships world-wide through a registered parcel for less than $5. We encourage international buyers to get it from Elecrow because they can save money shipping, and the shipment comes with a tracking number. US customers, however, would still be able to buy it from our Tindie store. If you are not familiar with Easy Pulse, “Easy Pulse is a DIY pulse sensor that can be used for detecting the cardio-vascular pulse wave from a fingertip.

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