Tuesday, April 23rd, 2019
Steve (VE7SL) has built a Jones Power-Oscillator using a pair of 6L6s and wrote a post on his blog detailing its assembly.Tags: homebrew, Jones oscillator, push-pull oscillator
Posted in DIY | No Comments »
Monday, April 22nd, 2019
Glen has written an article detailing his homebrew DMX-controlled RGB LED light: This project is a small DMX-512 controlled, color-changing RGB LED light. The light can be controlled via the DMX512 protocol or it can run a number of built-in programs depending on how the software is configured. The light incorporates an...Tuesday, April 2nd, 2019
Vinod made a Qi wireless power receiver using Attiny13, that is available on GitHub: I have only two aims while trying this. The receiver should get powered by the transmitter continuously. I should be able to control the power received by adjusting the error packets, in my case I am...Tags: ATtiny13, receiver
Posted in AVR, DIY | No Comments »
Tuesday, March 19th, 2019
Dr. Scott M. Baker published a new build: In this video, I build a 3D Printed Desk lamp. The basic design came from Thingiverse, but I repurposed my LM2576 Constant-Current design to serve as a dimmer. It all started when I found an interesting lamp on thingiverse, which used 75mm...Tags: 3D, LM2576
Posted in DIY | No Comments »
Monday, March 18th, 2019
Scott Harden built a DIY ECG project with AD8232, that is available on Github: Every few years I revisit the idea of building an ECG machine. This time I was very impressed with how easy it is to achieve using the AD8232, a single-lead ECG front-end on a chip. The AD8232 is...Tags: AD8232, ECG
Posted in DIY | No Comments »
Tuesday, March 5th, 2019
Dr. Scott M. Baker made this Pi-based environmental monitor and wrote a post on his blog detailing its assembly: For years I’ve followed the “uRadMonitor”, a device that does air quality monitoring and radiation monitoring. I’ve played with geiger counter projects before and frankly found them to be not very interesting....Tags: monitor, Raspberry Pi
Posted in DIY, R-Pi | No Comments »
Thursday, February 21st, 2019
Dr. Scott M. Baker published a new build: My goals include: 1. The ability to switch each device on/off with a rocker or toggle switch 2. Current limiting capability via a fuse or similar device 3. Overvoltage protection 4. Visual indicator (LED) of operational status 5. Multiple independent outlet See...Tags: USB power
Posted in DIY, USB | No Comments »
Tuesday, February 5th, 2019
Antalife has written an article detailing the build of his a solar powered weather station: To expand my microcontroller and programming knowledge I have decided to try and make a Solar Powered Weather Station. My goal is to record parameters like: *Temperature *Humidity *Air pressure *Air quality (something to do with CO or CO2)...Tags: weather station
Posted in DIY | No Comments »
Friday, February 1st, 2019
Dilshan Jayakody published a new build: In this project we build simple I2S stereo decoder with amplifier. To decode I2S data we use Princeton Technologies PT8211 16bit DAC. KA2206 audio power amplifier is used as driver stage of this system. Structure of this I2S amplifier is self-explanatory from the schematic....Tags: amplifier, i2s, Raspberry Pi
Posted in DIY | No Comments »
Wednesday, January 30th, 2019
KA7OEI has a great write-up on building a transmit converter for 630 and 2200 meters: As the name implies, a transmit converter takes another frequency - such as that produced by a conventional HF transceiver - and converts it to another frequency. In my case I use an FT-817 -...Tags: transmit converter, transmitter, transverter
Posted in DIY, RF | No Comments »
Tuesday, January 29th, 2019
Edward Mallon writes: Dr. Beddow’s instrumentation class has been building the 2016 version of the Cave Pearl datalogger for more than three years, and feedback from that experience motivated a redesign to accommodate a wider range of student projects while staying within the time constraints of a typical lab-time schedule....Tags: data logger, Pro Mini
Posted in Arduino, DIY | 1 Comment »
Tuesday, January 29th, 2019
A detailed instructions of how to build this weather station project by Open Green Energy: This Instructable is a continuation to my earlier weather station project. It was quite popular on the web, people around the globe made their own by following it and given valuable feedbacks for improvement.By taking consideration in...Tags: weather station, Wi-Fi
Posted in DIY, tutorials | No Comments »
Friday, January 18th, 2019
Dave Richards (AA7EE) has written an article detailing his 1mW solar-powered HiFER beacon project, the Boris Beacon: In this post from May of last year, I detailed the construction of a 1mW solar-powered HiFER beacon. I named it the Boris Beacon, in tribute to my neighbor’s cat. The beacon was never mounted...Tags: HiFER Beacon, homebrew radio
Posted in DIY | No Comments »
Monday, January 14th, 2019
Dejan over at HowToMechatronics posted a detailed how-to on building DIY Arduino RC transmitter: Now I can wirelessly control any Arduino project with just some small adjustments at the receiver side. This transmitter can be also used as any commercial RC transmitter for controlling RC toys, cars, drones and so...Tags: how-to, RC transmitter
Posted in Arduino, DIY, tutorials | No Comments »
Monday, January 7th, 2019
Michael Teeuw published a new build: Now that the MusiCubes tray is assembled and the RFID-sensor and LEDs are working as expected, It’s time to add the last feature of the original concept: invisible capacitive touch sensors to control the volume of the music. See the full post on Xonay...Tags: ESP8266, I2C, music, RFID
Posted in DIY | No Comments »
Thursday, January 3rd, 2019
Barton Dring designed and built a Polar Coaster drawing machine to draw custom, round drink coasters: I recently decided to update the Polar Coaster project. The primary reason was to update the controller to use Grbl_ESP32 firmware. I also thought I could make it smaller, lighter and remove a little...Tags: CNC, ESP32
Posted in DIY | No Comments »
Monday, December 17th, 2018
Dilshan Jayakody published a new build: This is real-time clock based automatic LED lamp which we originally designed to use as night light. This lamp can programmed to turn on and off at the specific time of the day. For example, it can program to turn on at 6 PM...Tags: ds1307, LED, PIC16F883, rtc
Posted in DIY, LEDs, PIC | No Comments »
Friday, December 14th, 2018
A nice write-up on Sheldon's (N6JJA) version of N1BYT’s WBR regenerative receiver: This article is broken into two parts. First comes the “Oscar” preselector/preamplifier. As I said, I intended it to be either part of the overall receiver or used as a standalone where desired. The second part deals with...Tags: amateur radio, homebrew radio
Posted in DIY, RF | No Comments »
Wednesday, December 12th, 2018
Vasily Ivanenko has written an article detailing his AF dummy load project: I'll describe a simple 8, or 4 Ω dummy load to test your home brew guitar power amplifiers. Low cost 16 Ω / 25W wire wound, aluminum shell, chassis mount resistors seem abundant. I got mine on eBay. Wire wound...Tags: dummy load
Posted in DIY, tools | No Comments »
