Seeed Studio has announced that RePhone, an open source and modular phone kit is now being offered on Kickstarter! With Rephone you can: 1.Create your own phone in minutes with the slim MODULES, accessible SOFTWARE, and customizable Phone Enclosures. 2.Hack anything around you, giving inanimate objects the power of cellular communication. Have a conversation with […]
Author Archives: DP
#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 […]
Software Spectrum Analyzer for the Rigol 1000 series oscilloscopes
rheslip writes: I came up with this idea after seeing Farhan Ashar’s spectrum analyzer design which uses some of the same bits and pieces I used in the Simple Scalar Network Analyzer. Farhan’s is a classic heterodyne SA design – the addition of mixers and filters in front of the power detector makes the analyzer […]
Photon headerless – SMD mounted
Carsten4207 writes: Just wanted to share what a Photon soldered directly onto a PCB looks like As far as what this is, this will replace my Honeywell Zoning Panel (HZ311) and will give me the ability to add variable dampers. This will also hookup to my HVAC’s motor (Evergreen IM) so I can adjust the […]
AC energy metering board using an Atmel 90E24 energy metering chip
Steve Rodgers writes, “Here’s my latest project. Its an AC energy metering board using an Atmel 90E24 energy metering chip. The board can either take an ESP8266-12 and run a native C application, or the ESP8266-12 can be omitted, and an external microcontroller can be used to talk to the Atmel 90E24 energy metering chip. […]
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: Soldering Tip Care and Use
A quick app note from Weller on soldering tip care. Link here (PDF!) When it comes to soldering irons, you know that the tip is the most critical component. While the soldering iron holds and heats the tip and controls its performance, the tip is tasked with the most important job of transferring heat efficiently […]
App note: “Is Your Soldering Equipment Speeding?”
A technical note from Weller on how accurate your soldering tool reading are. Link here (PDF!) With so many technological advancements, there is no excuse for incorrect measurement readings. For example, your automobile has a number of alternative methods to check the accuracy of the speedometer. You rely on those indicators to be accurate. If […]
Universal soldering controller
SZ64 posted picture of his soldering controller PCB build in the project log forum: Hi sparkybg, You have indeed perish in labor ;-) Just say that you are well. I managed to finally all up and running as it should. Via the forum.
Dobot: Robotic Arm for everyone, Arduino & Open Source
Here’s an interesting open source project on Kickstarter the magical robotic arm, Dobot: Designed for DESKTOP. Arduino-powered, 4-axis parallel-mechanism robot arm with High Quality. For makers, educators, and everyone! We are six engineers who built a 4-axis high accuracy, high repeat precision, stepper motor, Arduino-based, desktop robotic arm called Dobot. You can visit his Kickstart page […]
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 […]
Tutorial: How to patch the USB IR Toy driver into LIRC sources
Oskar’s tutorial on how to patch the USB Infrared Toy driver into LIRC sources. Get detailed instructions on github. You can get IR Toy v2 for $22.05, including world wide shipping.
HC508 Amiga 500 accelerator card
A HC508 Amiga 500 accelerator card project from mc68k: Finally, the project has reached a stage when complete system tests are possible The integrated CF + IDE allows running the complete OS 3.1 with WHDLoad. Key feaures: 68HC000 CPU running at 50 MHz (100% MC68000 compatibility) 40 pin IDE connector for HDD, CD ROM etc. […]
#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 […]
Data logger deluxe version
An update on LuckyResistor’s data logger project we covered previously: Just to let you know the deluxe version of the data logger is almost done. The hardware is ready and tested – currently I finish the menu based software for the data logger. Menu based control with 5 capacitive inputs Record, view records, send records […]
Screw it, lets go live! Dev site launch
Dirt cheap SLA 3d prints, custom color PCBs, and not-ripping-you-off pogo test pins are now available at dev.dangerousprototypes.com! We built a bunch of new, no nonsense, instant pricing services modeled after the simplicity of DirtyPCBs.com, please help us test them! Dirty SLA 3D prints – $0.95 per gram for beautiful white SLA 3D prints. Upload […]
Fake TV security light
Marcus Jenkins writes, “I made this gadget which steps up the game from leaving a light on at home when you’re out. Place in near a window to make it look like somebody’s at home watching TV. ” Project details at Marcus Jenkins’ site. Via the contact form.
Directional coupler
Flathagen blogged about his DIY directional coupler: It is simple to construct the directional coupler. The transformers are FT50-43 toroid cores with 32 turns of 24 AWG enamel wire. The primary winding is simply a piece of RG58 through the torioid (i.e., one turn). Different designs use different toroids and number of turns. I settled […]
App note: Understanding latch-up in advanced CMOS logic
Another old app note from Fairchild Semiconductor about CMOS latch-up. Link here (PDF!) Latch-up is a failure mechanism of CMOS integrated circuits characterized by excessive current drain coupled with functional failure, parametric failure and/or device destruction. It may be a temporary condition that terminates upon removal of the exciting stimulus, a catastrophic condition that requires […]
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 […]