Here’s an application note from Atmel for using the 10-bit ADC amplified conversion on AT90PWM (PDF!): ADC features on Atmel® AVR® AT90PWM devices: – 10-bit ADC amplified conversion with differential inputs – Programmable gain – Internal voltage reference The AT90PWM devices feature a 10-bit successive approximation ADC. The ADC is connected to an analog multiplexer […]
Author Archives: DP
Ken Gracey Quadcopter Build
Ken Gracey Quadcopter build: Ken Gracey, the President of Parallax is building a huge quadcopter. In the picture above it might not look that big but when you realize that the propellers are 14 inches that might put things into perspective! There are 2 X 4 amp hour 18 volt batteries feeding the 770 KV […]
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. More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three times every week: Free PCB Sunday. The classic. Every week, get […]
Week in (p)review July 26, 2013
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. Making wine in Shenzhen: four months into a three week tour Making wine in Shenzhen: Single row cable kit Adam Carlson wrote a short review of the Open Bench Logic Sniffer Yet another Logic Sniffer case Bus Pirate makes […]
Bus Pirate v3.5a-SOIC DIY edition free PCB build
Sleepwalker3 posted pictures of his free Bus Pirate v3.5a SOIC DIY edition PCB build. These boards were designed with the larger SOIC PIC microcontrollers, making them easier to solder for beginners. Get an assembled Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors. Via the forum.
COLDES1 (COLlaborative DESign) – LCD 2 TV Out
Mats writes: Most of the PAWs are rather simple but I’d like to to some more involved/advanced projects every now and then. So I would like to propose a new series of projects – the COLDES – Collaborative Design. Where we are a few that uses our shared time and experiences to come up with […]
Logic Analyzer costs little, performs well
Adam Carlson over at Microcontroller Central wrote a short review of the OpenBench Logic Sniffer: The OLS, the lowest-cost option, is both open-source hardware and open-source software. This is the product of a cooperative effort between Dangerous Prototypes and the Gadget Factory. To me, being open-source is not necessarily a plus. While it is great […]
Seeed Studio’s new PCB assembly prototype service
Seeed Studio PCBA prototype service testing: Appreciated you use our fusion PCB service before. For greatly increase your efficiency for your product design from prototype stage, it bring a new service for your check. We are going to launch a new service online at the end of July—PCB assembly prototype service. We could help […]
Making wine in Shenzhen: Single row cable kit
Often it’s not clear exactly what connector, button, switch, or part is the best choice for a project. We end up making a last minute order of 1 or 2 of any likely candidate from Mouser or Digikey. That sets the project off by about a week while we dig through datasheets and websites, make […]
Audio/video routing switcher
Benoit Frigon posted his audio/video routing switcher project: It’s an audio/video (composite) routing switcher, i used it to switch between video sources on my tv. The tv I had back then only had 1 video input. It consist of a 8×8 video crosspoint (MAX4456) and a 16×16 analog crosspoint (AD8113) controlled by a small microcontroller […]
Dummy electrical Load
Debraj built an electrical dummy load to test his power supply and wrote a post on his site detailing it’s assembly: Recently, I purchased a power supply that claimed a max current of 2A and 0~15V. So I wanted to test it. I had a 36 watts bulb (used in motor cycles), but that was too […]
BB Prince free kit build
FourthDr built this BB Prince he won in Mats’ giveaway contest. It’s a small multi-purpose utility for your solderless breadboard: Anyone else receive their kit? I’m going to use mine with some minimal Arduino circuits on my bread board along with the crystal module you made. Via the forum.
I just donated to Open Hardware Summit, did you?
This is our fourth year sponsoring the Open Hardware Summit happening September 6, 2013 at MIT. You can be a sponsor too: The summit relies on forward-thinking donors to help cover costs of venue, catering, multimedia and more, so that we can keep ticket prices low, and ensure that we can offer a truly open, accessible […]
Polyimide (Kapton) PCB solder paste stencil
cmiyc wrote this Instructable: Polyimide (Kapton) PCB solder paste stencil Creating a solder paste stencil for a toaster reflow oven or hot plate is simple when you have access to a laser cutter. I used the Laser Cutter at my local TechShop to create this and other PCB stencils. This Instructable assumes you have created a PCB […]
#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 […]
Simple high bright LED night light with dimmer
Dilshan designed and developed a high bright LED night light to replace his 5W (filament base) night lamp: This circuit is mainly based around TL494 PWM driver IC and LM350 – 3A adjustable voltage regulator. The LED used in this project is 9V – 10W high bright LED and this given design is capable to drive […]
Blinking earring project
Bertho posted his blinking earring in the project log forum: An idea of a blinking earring was born while talking at the local hackerspace. Inger was playing with harddisk parts and wanted to make blinking earrings. She has been doing workshops making jewelry from old computer parts (very, very nice; she is not an engineer/technician). […]
Bus Pirate makes life easier
M2M writes: First off, you guys Rock! I have had so much productive fun with BP and I just got it a few days ago. Here is a little thing I did to make a project weigh less. When you are prototyping GPS M2M you don’t always want to carry your laptop outside to get […]
PCB a Week 18: SMD Practice Skull
Mats continues his challenge of designing one PCB every week. In week 18 he came up with SMD Practice Skull: I while ago I chatted with (Re:load) Nick Johnson about making some simple pcbs for learning how to solder smd parts. This is one of the boards that I came up with. All parts are […]
App note: Using the XMEGA external bus interface
Here’s an application note from Atmel describing how to use the external bus interface fount on the XMEGA series AVR microcontrollers. The XMEGA External Bus Interface (EBI) is a highly flexible module for interfacing external memories and memory addressable peripherals such as LCD controllers and advanced communication controllers. The EBI module has four separate Chip […]