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Amateur Radio
- Diplexer with integrated Bias-T (Triplexer) for QO-100 and X-band microwave reception using LNBs
- Universal Clock Translator using Renesas VersaClock 6E Devices
- LNB Modification for 10 GHz QO-100 Satellite Reception
- JFET-based infinite impedance detector for AM-demodulation
- SITOR-B / NAVTEX Test Signal Generation
- VHF LDMOS Power Amplifier Experiments
- ICS501 / ICS501 VHF Experiments
- Lumped-Element Wilkinson Splitter / Combiner Design
- Tiger / Rat Tail for Handheld Radios
- 850 MHz Scanner Preamplifier / Filter Project
- HT RX/TX Performance Upgrade (Tiger Tail)
- Yaesu FT-8800 Extended TX (MARS/CAPS) Mod
- Microwave Frequency Meters
Arduino
- Tremolo DSP Effect for Arduino
- DSP Diode Clipping Algorithm for Overdrive and Distortion Effects
- Arduino GIGA R1 WiFi | Audio Loopback Example
- Program uBlox GPS-module timepulse frequency (dynamically) with an Arduino
DSP
Electronics
- DIY Spark Gap Transmitter
- DIY: Adjustable 30 kV High Voltage Power Supply
- Critical length of a PCB trace and when to treat it as a transmission line
- Etching PCBs using hydrochloric acid and hydrogen peroxide
- Total Harmonic Distortion (THD) from dBc
- Generate a stereo-FM multiplex waveform with Python and AWG
- Arduino |Automatically Save Variables to EEPROM on Power-Down
- Diamex Prog-S2 | Arduino IDE
- Automated Forward Gain Measurement
- Thermal Design Basics | Practical Example
- Generating PWM Signals
- Hacking a Strobe Light Controller
- Secondary Surveillance Radar | An Introduction
- What is a Gunnplexer? | Police Radar Gun
- 14 GHz Ku Band Block UpConverter
- Tektronix TSG4106 Introduction & Teardown
- Teledyne LeCroy Factory Tour
- Instrument Landing System Testing
- ILS Localizer / Glide Slope Test Signal Generation
- First PCB Manufacturing Run with Dirty PCBs
- Video Distribution Amplifier | 10 MHz Reference Distribution
- Tektronix RSA 306 | GPS Receiver and Clock Reference
- Importing Maps Into Tektronix RSA Map
- DipTrace Export Settings for Dirty PCB
- PCB Layout Design with DipTrace – An Overview
- Goodbye Radioshack!
- Teledyne LeCroy Factory Tour Day 1, Post 1
- Tektronix RSA306 IF Frequency Verification
- Filter Measurement using Noise Source
- Noise Figure Measurement (Gain Method)
- N-Way Wilkinson splitter / combiner design
- Wilkinson Splitter/ Combiner Design
- FBI Radio Teardown (Motorola Spectra)
- Resistive Splitters / Combiners
- Teledyne LeCroy WS3054
- Gravity Dependent Frequency / Tek MCA3027
- Hobbyists and the Cost of Software Options
- LeCroy WS3162 and HDO4024 Bugs
- VOR NAV Receiver Testing
- MDO4104B-6 Intro, Probe Calibration & License Transfer
- Mini-Circuits USB Power Sensor Review
- Microwave Experiments on a Budget
- Measuring filter response using a noise source
- Jackson Labs Chip Scale Atomic Clock (CSAC)
- Crystal oscillator frequency pulling
- Teledyne LeCroy HDO4024 Teardown
- Look Inside: Teledyne LeCroy HDO4024
- IC-706 MKII Extended Tx Modification
- Review: ADSP-BF592 EZ Lite Kit
- FT-101E and IC-718 Repair Impressions
- L-Network impedance matching
- Review: Abracon MEMSpeed Pro II Programmer / MEMS Oscillators
- 12-bit vs. 8-bit – What’s the difference?
- Review: Analog Devices ADF4360 PLL Synthesizer
- Review: Texas Instruments CC2531 USB Evaluation Module Kit
- Review: Goldsource 2000 W Step Up & Down Transformer
- One-Hung-Low brand 12 V to 220 V inverter
- DIY Passive Probe for the GHz range
- Source for toroids, magnet wire and IF cans
- Review: Analog Devices ADF4351
- Review: Teledyne LeCroy WaveStation 2052 – Arbitrary Waveform Generator
- Quick look at a BPSK31 signal
- Review: STM32 F3-series Discovery Kit
- DSSS / BPSK Clock Recovery with the Abracon ABFT
- Review: Abracon ABFT Frequency Translators
- Closer look at a Direct Sequence Spread Spectrum Signal
- Review: Jackson Labs GPSTCXO Eval Board
- Review: Teledyne LeCroy WaveAce 1002 – Digital Storage Oscilloscope
- Blown Capacitors – Repairing LCDs and TFTs
- Repairing a MRC DAR Plus Receiver
- Fixing a microstrip line in a professional Microwave ODU
- Crystal controlled listening device
- ICS501 – Integrated PLL Clock Multiplier
- Demystifying RF Circuit Design – The art of Voodoo
- Switched Capacitor (SC) comb filter
- Review: Abracon ABPSM-ULN-A – Precision Power Supply Module
- Review: Freescale FRDM-KL25Z development platform for Kinetis L-Series MCUs
- Review: Abracon Sync’n Go – Portable Precision Frequency Reference
- Why you should use high quality soldering tips
- Modifying a 240V / 50 Hz switch mode power supply for 120 V / 60 Hz
- Freescale’s Kinetis L-Series ARM® Cortex™-M0+ based MCUs
- JM38510/10901BPA – Military grade 555 timer IC
- Microcontroller Controlled Police Strobe Light
- Resuscitate Atmel AVR from CKSEL Fuse-Bit Death
- C-Band DRO LNB Teardown
- Atmel AVRISP mkII and BASCOM AVR
- AOCJY1 series high stability OCXOs from Abracon
- Simple VHF tracking device
- How it works: Quadrature detector
- Exclusive OR (XOR) gate based phase detector
- Low Noise Oscillator Design
- No Tune NE602 / NE612 FM Demodulator
- Pseudorandom Number Generator (PRNG)
- Direct Sequence Spread Spectrum Experiments
- Overtone Crystal Oscillator
- Murata VCO MCQ-501: The missing datasheet
- Broadband Preamplifier for up to 7 GHz
- Sudden Storm (HF receiver in a tuna can)
- Working low earth orbit satellites
- Simple oscillator as crystal tester
- BPSK, QPSK, 8PSK and QAM Calculator
- Frequency modulation vs. phase modulation