DP – Page 243 – Dangerous Prototypes

UPS transfer time measurement

Kerry D. Wong writes: Most offline/line interactive UPS‘ (Uninterrupted Power Supply) have a transfer time between 5 to 15 milliseconds. In this post, I will show you the results of the measured switch-over performance of my APC Back-UPS XS1500 and the technique I used.

Bus Pirate LCD adapter v3 back in stock

The Bus Pirate LCD adapter v3 is back in stock at Seeed Studio. This breakout board lets you drive, and test HD44780, and compatible LCDs with your Bus Pirate v3. We changed the PCB to one of our standard PCB sizes, namely the DP6037 v1. Get an LCD adapter for $9.

Microprocessor controlled 16 line connectivity tester

An ATmega32 based Proteus simulation of 16 line connectivity tester by Dilshan Jayakody: The main functionality of this system is to detect open and short circuits in cables and connectors. This system can test maximum of 16 lines in each test cycle and it indicate the defective line(s) through LCD. This is customizable system and user […]

Quality audio on Teensy3 with Arduino

Paul over at Dorkbotpdx writes: Over the last couple weeks I’ve been working on supporting quality audio (44.1 kHz, 16 bit) on Teensy3 using very simple Arduino style programming. This weekend I added buttons and knobs to control parameters…. This work is still at an early stage. I hope to publish a first alpha test […]

The Arduino as a simple JTAG adapter

pesco blogged about his free XC95144XL CPLD breakout board PCB build: A good while ago I won one of the free PCBs regularly given away by DIY hardware shop Dangerous Prototypes. My board of choice was a CPLD breakout board, for the Xilinx XC9572XL. CPLDs are the smaller brother of FPGAs: programmable logic chips that can be […]

Bus Pirate v4 back in stock

Bus Pirate v4 is back in stock at Seeed Studio. The Bus Pirate is an open source hacker multi-tool that talks to electronic stuff. It’s got a bunch of features an intrepid hacker might need to prototype their next project. You can get a Bus Pirate v4 for $40, including worldwide shipping.

USB Tester OLED backpack update

William at MobileWill posted an update on his USB Tester OLED backpack we covered previously: There is a new firmware update for the USB Tester OLED Backpack. This update completely redesigns the display and makes use of the button. You can find the update on github. If you need directions on how to update: www.friedcircuits

Nibbler: Another 7400 4-bit custom CPU

Steve at Big Mess o’ Wires writes: I know the Open 7400 Contest is long past, but I wanted to call out a new 7400-based custom CPU I’m building. It’s a 4 bit CPU called “Nibbler”, and more info is on my web site here My goals are to keep the chip count to an absolute […]

Logic Sniffer 16-bit input buffer wing back in stock

Logic Sniffer 16-bit input buffer is back in stock at Seeed Studio. This accessory buffers the extra 16 I/O bits on the ‘wing’ header. The Open Logic Sniffer buffer wing in stock and shipping now for $15.

Dot-Matrix MSP430 alarm clock update

Markus Gritsch posted an update on his Dot-Matrix MSP430 alarm clock we covered previously: Using the ADC is a good suggestion. Thank you! The clock now has an additional state after turning the flashlight off, where it displays the battery voltage in volt. I also added an additional displaying mode where it uses dice symbols for […]

Color Meter project

Isonno posted his Color Meter in the project forum: It’s a digital meter for measuring color; either the reflected color of solid object, or emitted light. It works, but the original goal was to measure/calibrate the output of RGB LEDs driven by PWM, but that didn’t work out so well. Via the forum.

#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 […]

Project-a-week: RickPAW – ISP2DIP

This week Rwinscot shared his ISP2DIP project in the forum. And he is giving away 2 freebies: These turned out just as well as the TAG2DIP adapter… as with my others I have 2 freebies to give away. Just send me your name/address and I’ll drop one in the mail for you.

PIC based wristwatch project

exapod shared his PIC based wirst watch project in the forum: i’m building a PIC based wrist watch with a sharp memory lcd as the screen. it has an accelerometer, 4 push button,rgb led for the backlight, a micro usb connector for charging the lipo and a an 18 bit adc for fuel gauge.The pic is […]

I2C LED Display from Hacked Voltmeter

Tom writes: I turned up this cool project write up that reprogrammed a cheap LED voltmeter for use as a general purpose 7 segment display with I2C communication. These voltmeters cost about $3 instead of $10 for an equivalent LED display backpack from Adafruit. NB the author used a Bus Pirate to troubleshoot the bitbanged […]

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 […]

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 August 23, 2013

Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. CxemCAR 2 – Android controlled RC car with video, Bluetooth, WiFi TI’s offers free Medical Imaging Software Tool Kit (STK-MED) Breakout board uses HB100 doppler motion sensor Lattice debuts iCEstick FPGA Evaluation Board at $24.99 Open source plant […]