Erich Styger has made a series of tutorial blog posts on using the new NXP MCUXpresso IDE. Published so far are: MCUXpresso IDE: Unified Eclipse IDE for NXPs ARM Cortex-M Microcontrollers MCUXpresso IDE: S-Record, Intel Hex and Binary Files MCUXpresso IDE: Adding the Eclipse Marketplace Client MCUXpresso IDE: Importing Kinetis Design Studio Projects MCUXpresso IDE: […]
Author Archives: DP
RX/TX sequencer
Lukas Fässler has designed and built an RX/TX sequencer based on a PIC16F18325, that is available on github: Much like the beacon keyer presented here earlier, this RX/TX sequencer is a simple but useful little device. Its typical use is in ham radio applications when a separate power amplifier (PA) and/or a sensitive low-noise pre-amplifier (LNA) is used. […]
Philips MR16 12V 2017 LED teardown
Teardown of a 500lm MR16 12V LED light bulb from Electronupdate. Check out the video after the break.
Bus Pirate PCB build
Ben Kazemi shares his latest build a Bus Pirate v3.6a PCB. The Bus Pirate is an open source hacker multi-tool that talks to electronic stuff. My latest build – i have to say the yellow soldermask is prettier than it looks on the photos, i also like to think i earnt something special for having […]
Deepace KC901V 6.8GHz handheld network analyzer review, teardown and experiments
Teardown and analysis of Deepace KC901V 6.8GHz handheld network analyzer from the The Signal Path: In this episode Shahriar reviews the Deepace KC901V 6.8GHz handheld network analyzer. This battery-powered instrument is an RF multi-instrument integrating VNA, spectrum analyzer, field strength meter, and a low-frequency signal generator. It can also perform signal port vector measurement and 2-ports simple vector […]
Pulsecounting and deepsleep based IoT water meter
Tisham Dhar has written an article detailing his pulsecounting and deepsleep based IoT water meter project: I admit to being a tiny bit obsessed with monitoring utility bills and gathering data on my usage patterns blow-by-blow. The energy monitoring has reduced my electricity bills, so I wanted to have a go at the water usage. […]
A DC motor controller with control LEDs
Boris Landoni writes about a new open source project a DC motor controller with control LEDs: It can be controlled through logic levels to set the speed and the direction of the rotation of CC brushed motors and stepper motors; outputs have LEDs indicating the rotation direction. The circuit board we are presenting this time is […]
Free PCB Sunday: Pick your PCB
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will […]
App note: Active capacitor discharge circuit considerations for FPGAs
Power down sequencing and discharging on FPGAs app note from Diodes Incorporated. Link here (PDF) FPGA’s need the different power rails to be powered up and down in a defined sequence. For power down, each sequenced rail needs to be fully off before the next rail is turned off. With large high speed and high […]
App note: Power supply rejection for low-jitter clocks
Method of rejecting noises from power supply, an app note from Silicon Labs. Link here (PDF) Hardware designers are routinely challenged to increase functional density while shrinking the overall PCB footprint of each new design. One significant challenge is minimizing clock jitter through careful board design while meeting the design’s functional and space requirements. Since […]
Adjustable constant current source
Dilshan Jayakody has published a new build: The current source introduced in this article is capable to handle current up to 6A with maximum input voltage of 50V. This is an operational amplifier based adjustable current source and it uses LM358 in a general voltage follower configuration. To handle large currents we use four 0.1Ω […]
3D POV display
Gelstronic shared detailed instructions of how to build this 3D POV display, project instructables here: In my project i use a spinning helix of LED strips. There are a total of 144 LEDs that can displays 17280 voxels with 16 colors. The voxels are arranged circularly in 12 levels. The LEDs are controlled by only […]
Free PCB coupon via Facebook to 2 random commenters
Every Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. The coupon code usually go to Facebook ‘Other’ Messages Folder . More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three […]
Duck DNS ESP8266 mini WiFi client
An ESP8266 Duck DNS client from Davide Gironi: It is powered by USB, it can also be powered by the router USB port. It’s built on a pretty old ESP-01 board. It has two led, one is the ESP-01 WiFi connection status embedded one, the other is connected to the GPIO2 port, and it’s used […]
Creating custom 3D printed LED bar graphs
Glen Akins has a nice build log on his 3D printed LED bar graphs: While building my zombie containment unit, I decided I wanted some LED displays or bar graphs to complement the containment status video running on the smaller secondary video monitor. Some other containment units used LED air pressure gauges from eBay. I […]
Programmable LED dimmer
Programmable LED dimmer from Soldernerd: Around one and a half years ago I’ve designed and built various LED dimmers for both white and RGB LEDs. Then late last year someone approached me asking if I could make an RGB dimmer for him, too. But my designs were really tailored to their specific applications and built […]
Dynamic lights with CMOS integrated
Nicu Florica @ Arduinotehniq writes: Inspired by a 1990 article from Tehnium anual magazine, I revisited an old schematic of mine designed for dynamic “games” without the need for microcontrollers. A few years back, I was in search of a straightforward solution for an automatic game system, and this schematic came to mind. I refined […]
Build an open source laser reflection barrier
Boris Landoni from Open Electronics writes about an open source project laser reflection barrier: It allows us to detect the presence and passage of an object thanks to the combination of a laser diode which emits a light ray and a phototransistor which detects reflected light. Robotics applications and industrial control systems normally make use of optical […]
#FreePCB via Twitter to 2 random RTs
Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every week: Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch […]
Build your very own drink mixing robot
Yu Jiang Tham designed and built his own bartender robot named Bar Mixvah, that is available on Github: I built a robot that mixes drinks named Bar Mixvah. It utilizes an Arduino microcontroller switching a series of pumps via transistors on the physical layer, and the MEAN stack (MongoDB, Express.js, Angular.js, Node.js) and jQuery for the […]