LPC1114 controlled Midi Synthesizer

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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

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SatNOGS is the 2014 Hackaday Prize winner

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Hackaday has announced the grand prize winner of the 2014 Hackaday Prize today. The winner is SatNOGs, a complete platform of an open-source satellite ground station built from readily available and affordable tools and resources. Hackaday writes, It opens up the use of satellite data to a much wider range of humanity by providing plans to build satellite tracking stations, and a protocol and framework to share the satellite data with those that cannot afford, or lack the skills to build their own tracking station. The hardware itself is based on readily available materials, commodity electronics, and just a bit of

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Microchip announces new 16-bit A/D converters with 200Msps sampling rate

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Microchip Technology Inc. has announced two families of new high-speed A/D converters in the MCP37DX1-200 and MCP372X1-200 families. These families feature 12-, 14- and 16-bit pipelined A/D converters with a maximum sampling rate of 200 Mega samples per second (Msps). The 14- and 16-bit devices feature high accuracy of over 74 dB Signal-to-Noise Ratio (SNR) and over 90 dB Spurious Free Dynamic Range (SFDR), while the 12-bit devices have 71.3 dB SNR and 90 dB SFDR. This enables high-precision measurements of fast input signals. These families operate at very low-power consumption of 490 mW at 200 Msps including LVDS digital

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Mooltipass: An offline password keeper

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In today’s digital world, password management has become an indispensable and challenging part of our lives. No matter is it our online banking, social media, email, restaurant, utilities, or remote server account, every web-interaction these days requires you to create a strong, non-repetitive, and frequently-changed  password to login to the system. With growing number of online accounts and their strong password policies, keeping track of the passwords is getting annoying and harder. Choosing the same password for multiple accounts puts your entire online identity at risk if that password is compromised. To address this password problem, Hackaday introduces a new

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Motion Sensing Pumpkin Vibrobot

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Mechanical Engineer and K-12 STEM educator, Ben Finio, has designed this kid-friendly motion sensing pumpkin Bot, which could be a fun project to make for the next Halloween. The thing I liked the most about this PumpkinBot is its simplicity and microcontroller-free design. His motion-sensing bot uses a passive infrared (PIR) sensor attached in front of the pumpkin to detect motion. Three toothbrush heads are glued underneath the PumpkinBot to give it a stable tripod. When a motion is sensed, it triggers the robot’s LED eyes and a DC motor attached on its back. A wine cork fixed to the

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