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Category Archives: ARM projects

Meet Teensy LC (low cost)

Posted on February 3, 2015 by R-B Leave a comment

Meet the new Teensy LC, a more affordable version of popular Teensy ARM development board and is now available for pre-order for only $$11.65. It features an ARM Cortex-M0+ processor at 48 MHz, 62K Flash, 8K RAM, 12 bit analog input & output, hardware Serial, SPI & I2C, USB, and a total of 27 I/O pins. And most importantly, Teensy-LC maintains the same form-factor as Teensy 3.1, with most pins offering similar peripheral features. Most modern projects involve serial communication with sensors, other chips, other systems, or even the internet. Hardware serial ports greatly simplify projects and enable excellent performance. Teensy-LC provide

Open-source ARM Pro Mini

Posted on January 20, 2015 by R-B One comment

Zapta has shared the design files on github for his ARM PRO MINI, which is an open source ARM M0 microcontroller development board that could be handy for quick prototyping and as a starting point for your own ARM based custom designs. Highlights Prototyping friendly. Compatible with standard soldieries breadboards and can be soldered to a standard 0.1” proto board. Straight forward barebone design. Customize for your own PCB design by selecting the portions of the circuit you need. Single package install of the free and fully feature IDE (NXP Eclipse/LPCXpresso). Zero software installation when using with the mbed.org online

Portable GPS logger for runners

Posted on November 24, 2014 by R-B Leave a comment

Daniel’s portable GPS logger is a university-funded project and is geared towards runners to record their movement. The core hardware of the project mainly consists of an LPC1778 Cortex M3 microcontroller, an Adafruit Ultimate GPS module, and a Newhaven Display 2.4″ ILI9340 QVGA LCD, which are all powered by a 500 mAh Lithium Ion battery.The GPS logger circuit also contains an on-board batter charger circuit using Microchip MCP73831T IC. It displays the current distance traveled and the time taken to travel the distance. The maps are generated from TileMill using a custom color scheme and OpenStreetMap data, and are stored in a microSD card. The electrical

LPC1114 controlled Midi Synthesizer

Posted on November 13, 2014 by R-B Leave a comment

Matt Sarnoff built this digital monophonic synthesizer using the NXP LPC1114FN28 ARM Cortex-M0 microcontroller and MCP4921 SPI DAC. It is a midi synthesizer with following features: 4 oscillators; sawtooth or pulse with adjustable duty cycle with coarse and fine tuning 2-pole (“Chamberlin”) state-variable filter with lowpass, highpass, and bandpass modes Attack-release envelopes for amplitude and modulation Low-frequency oscillator with four shapes (triangle, ramp, square, random) LFO and/or modulation envelope can affect filter cutoff frequency, pitch, and pulse width Keyboard tracking for filter cutoff frequency Glide with 3 different rate presets MIDI input; monophonic with last-note priority 250kHz, 12-bit output Powered by 3 AA