This article continues my newly acquired interest in implementing digital signal processing algorithms on the Arduino GIGA R1 by showing how to implement a tremolo effect algorithm in software. After showing how to implement an Audio Loopback Device and a DSP Diode Clipping Algorithm for Overdrive and Distortion Effects on the Arduino GIGA R1 WiFi, […]
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Program uBlox GPS-module timepulse frequency (dynamically) with an Arduino
The uBlox GPS-modules are capable of providing various reference clock signals through the TIMEPULSE pin. By default, this pin outputs a 1 pulse-per-second (PPS) signal. For an upcoming project, a GPS disciplined oscillator (GPSDO), this output had to be adjusted to 100 kHz. Instead of using the manufactuer’s software, u-center, this task is supposed to […]
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Review: Abracon MEMSpeed Pro II Programmer / MEMS Oscillators
Most circuit design engineers know this problem. They seem to have an inexhaustible amount of oscillators with all kinds of frequencies available, but there’s always one frequency that seems to be unavailable: the one they need. Abracon offers a variety of low-cost MEMS oscillators that can be programmed for a wide range of frequencies. When […]
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Switched Capacitor (SC) comb filter
Switched-capacitor filters are great alternatives to standard LC filters. Their frequency response can easily be controlled solely by an external clock signal. In this short article we will have a closer look at an extremely narrow switched-capacitor comb filter. For a homebrew EAS (Emergency Alert System) decoder I needed a very selective band pass filter […]
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DIY: Adjustable 30 kV High Voltage Power Supply
High voltage power supplies can open interesting doors to research topics such as laser, x-ray, spark gap transmitters. And many other specialized niches. Unfortunately, laboratory grade high voltage power supplies are rather costly. Luckily, there is a much less expensive way to put high voltage experiments into the hobbyists reach. This article shows how to […]
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DSP Diode Clipping Algorithm for Overdrive and Distortion Effects
This article shows how to approximate the behaviour of a regular diode in a mathematical equation and how to subsequently implement the behaviour in software. The DSP algorithm can be modified to implement different topologies, such as single diode clipping, dual diode symmetrical soft clipping or asymmetrical clipping. The easiest way to implement distortion through […]
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LNB Modification for 10 GHz QO-100 Satellite Reception
This article shows how to modify an inexpensive LNB to accept an external LO-reference signal in order to be used as a K-band downconverter for QO-100 (Qatar Es’hail 2) amateur radio sattelite reception, radio astronomy or similar K-band experiments. This article is a shortened version of a scientific paper that I wrote as the lead […]
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Review: Teledyne LeCroy WaveStation 2052 – Arbitrary Waveform Generator
After having a look at a Teledyne LeCroy WaveAce series oscilloscope recently, it’s time to have a look at the entry-level WaveStation family of arbitrary waveform generators. The WaveStation generators and the WaveAce oscilloscopes are designed to be capable of working hand-in-hand. The Teledyne LeCroy WaveStation 2052 is a 50 MHz, 2-channel Function/Arbitrary Waveform Generator […]
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Review: Jackson Labs GPSTCXO Eval Board
Jackson Labs offers several different precision timing solutions. Among them are various GPS-disciplined oscillators. They sent me an evaluation board for one of their ultra small, low-cost GPSDO. So let’s check it out! The GPS-disciplined Oscillator (GPSDO) reviewed in this article is a state-of-the-art eval board from Jackson labs equipped with a high-performance GPS receiver, […]
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Review: Abracon Sync’n Go – Portable Precision Frequency Reference
Most professional devices which require high accuracy and precision have an input for some sort of external frequency reference. The frequency 10 MHz is an industry standard particularly for test equipment. Most reference generators are designed for lab use and therefore are bulky and unsuitable for portable use. Abracon now offers a pocket-sized portable solution. […]
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