Back to basic LCD interfacing app note(PDF!) from Silicon Labs. This application note provides an example interface for a C8051F330 device with an example LCD. First, this application note describes how an LCD works and then describes the two types of LCDs: direct drive and multiplexed drive. Next, the software interface and structure are explained. […]
Author Archives: DP
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: Advanced Encryption Standard (AES) implementation on C8051F326/7 devices
An AES implementation on Silicon Labs’ C8051F326/7 microcontrollers app note(PDF!) The Advanced Encryption Standard (AES) is an algorithm used to encrypt and decrypt data for the purposes of protecting the data when it is transmitted electronically. The AES algorithm allows for the use of cipher keys that are 128, 192, or 256 bits long to […]
App note: Designing efficient digital up and down converters for narrowband systems
An app note (PDF!) from Xilinx on designing efficient digital up and down converters for narrowband systems: Digital Up Converters (DUC) and Digital Down Converters (DDC) are key components of RF systems in communications, sensing, and imaging. This application note demonstrates how efficient DUC/DDC implementations can be created by leveraging Xilinx® DSP tools and IP portfolio for increased […]
Teensy SDR transceiver description
rheslip has been working on a software defined radio using the Arduino compatible Teensy 3.1 and audio shield from PJRC. Source code is available on Github. Project info at Open Emitter blog.
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 times every […]
Mini stereo SE tube amp
Gert of KGELABS posted a step by step guide of his DIY small stereo amplifier: This project started after getting an old schoolproject from a friend. A metal chassis with a single ECL86 tube, a power transformer and a small Muvolett (Amroh) 7044 output transformer. Intrigued by the simplicity of this amplifier I decided to rebuild the amplifier […]
KF5OBS’ Dirty PCBs review
KF5OBS’ first PCB manufacturing run with Dirty PCBs: So what’s the quality of the board? For $ 33 delivered I naturally didn’t expect much. But I was wrong. First off, I received 12 PCBs. So the Protopack definitely worked in my favor over ordering a guaranteed 10 pack for twice the price. Asides from some […]
Laser cut cases for Bus Pirate and Logic Pirate
Chase made custom 3D printed/laser-cut cases for the Bus Pirate and Logic Pirate. These cases are up on Thingiverse. See other cases too. Thanks Chase! Via the contact form.
Kit assembly 0-30V 0-3A adjustable linear power supply
Florin of YourITronics writes, “In this video I am assembling a 0-30V 0-3A Adjustable Linear Power Supply kit. Will it work at first power on? Or will Murphy get me this time? Watch the video and see how I got myself into trouble. I also reverse engineered and got a schematic of this kit which I […]
Yet another laser oscilloscope
Kerry Wong writes: You can generate some pretty amazing patterns by shining a laser onto a mirror mounted on a vibrating speaker cone, a lot of people have experimented with this kind of laser show. But how about building a true laser oscilloscope that is capable of displaying signals? In this post, I will show […]
Embrio tutorial – Custom Arduino nodes
A followup to the Embrio – a visual programming environment for Arduino post. Ezra Schwartz, maker of Embrio, just posted a new version of the software with better functionality for writing Arduino code right into a visual node: Embrio lets you create the logic and structure of your programs with it’s powerful “agent based” architecture, but also […]
STM32 ADC
Shawon Shahryiar over at Embedded Lab has written an article discussing the basics of STM32 ADC: The block diagram shown above might look a bit complex at first but it still worth having a look. It shows us the interfaces that are related to the ADC block and some key features. It seems that some external interrupt […]
LaserOscope project
Steve Schuler over at Science2.0 published a new build: A laser oscilloscope using Lego, littleBits, Erector set, and the Kano Computer Build a laser oscilloscope using Lego, littleBits, Erector set, and the Kano Computer. In honor of The International Year of Light I’ll demonstrate how use the Kano computer to drive a littleBits motor with an […]
ESP-03 modules with the Bus Pirate
Tim Jagenberg writes: Today I received the ESP-03 modules I had ordered from Shanghai. A nice little breakout for the ESP8266EX with ceramic antenna. Due to the 2mm spacing between the contacts on the sides, I had to bend the headers into shape before soldering them to the module. As an initial function test I used […]
DIY Internet connected smart humidifier
Martin’s DIY Internet connected smart humidifier project: The project uses a DHT22 temperature sensor mounted to the side of the enclosure for better ventilation and reliable reading: I threw in a ultra-cheap I2C OLED status display to get a visual reading. Milling the box so that the OLED shows was pretty nasty, hated it. I […]
Arduino decision box BE (Attiny85)
nqtronix wrote this instructable detailing the build of his Arduino Decision ‘Box’ BE (Breadboard edition): Pleace notice: This project neither contains a box nor any Arduino* code. I stuck with this name because this project is a modifictaion of Victor8o5’s “Arduino decision box 2.0 (Attiny85)” posted three days ago. I liked the way it looks and works, […]
#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 […]
Foobot, a robot table football game
Steve of mooplog has been working on a robot table football game called Foobot: My DIY robot table football game, using some super cheap 433mhz radio modules, some AVR microcontrollers (attiny2313 and attiny13) and classic Nintendo and Sega controllers to reignite the console wars… Project info at mooplog site. Check out the video after the break.
Soldering robot – Head assembly
Brian Dorey published a new build, a soldering robot project: We have finished the soldering iron element slider system and stepper mount for the new soldering robot project. The soldering iron element slides on a pair or 6mm rails, drylin® accessories, precision aluminium shaft 100mm length (part no: AWMP-06) with drylin® R – Bearings (part no: […]