Here’s a teardown & repair of the Siglent SHS810 100MHz 1GS/s portable oscilloscope & multimeter from The Signal Path: In this episode Shahriar examines the failure of a Siglent SHS810 100MHz 1GS/s portable oscilloscope and multimeter. The instrument’s multimeter inputs are functional, however the neither of the oscilloscope inputs display the correct waveform. The displayed […]
Author Archives: DP
Designing a PIC24 development board
Brian Dorey has designed and built a PIC24 development board, that is available at GitHub: One problem we found was trying to prototype code using this microcontroller as unlike Arduino and any ARM microcontrollers there isn’t a small easy to use prototyping board available for the PIC24 chip. Microchip make an Explorer 16 Development Board which […]
Cambridge audio A4 stereo Amplifier Mods
Steve did a teardown and refurbishment of a Cambridge Audio A4 Amplifier: In this video, Steve disassembles a Cambridge Audio A4 Integrated Amplifier which he rescued before it was thrown away. The amplifier is refurbished with new electrolytic capacitors and a clean inside before performing a modification to make the dials on the front panel glow. […]
#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 […]
Nifty USB LED light
Isonno writes, “One of the hit discoveries of Hacker Camp 5 were these little USB lights. Plugs in either way, and you turn on/off/dim by touching the back. Turns out the show is run by a chip called the Sigma SGL8022W. The datasheet has the schematic.” Via the forum.
TruPlay- Hacking into an OVC3860 based bluetooth A2DP adapter using the MSP430
TruPlay – controlling bluetooth A2DP devices using MSP430and OVC3860 from Rohit Gupta: I wanted it to 3D Print a new case but couldn’t so, made a PCB that would sit on the Top of the adapter and command it. I was lucky to have a 3.3V Regulator inside the adapter so, an extra regulator was […]
LED POV fan update
Zach writes: I first posted on how to reprogram a “Programmable Message Fan: Model 45 Series” POV fan a few years ago, and the code I posted no longer works with the current versions of the Octave and Arduino software. The original post still describes how the fan works and how I went about figuring […]
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: Synchronous CCSS Regulator
Capacitor-coupled switched shunt regulator (CCSS) App note from Microchip. App note here. Shunt regulators consist of two elements: a voltage regulator in parallel with the load (the shunt), and a series element between the supply and load to limit current. The parallel shunt regulates voltage by varying its conduction to maintain the desired voltage across […]
App note: HV823 & HV825 EL lamp driver circuits
App note from Microchip on their EL lamp drivers circuits utilizing (Supertex) HV823 and HV825, App note here. This application note presents fourteen EL driver circuits utilizing the Supertex HV823 and HV825 drivers. They have been optimized for a variety of applications and may be used as-is or used as a starting point in designing […]
App note: Understanding and using cyclic redundancy checks with Maxim 1-wire and iButton products
Understanding and using cyclic redundancy checks with Maxim 1-wire and iButton products, application note here (PDF!) from Maxim: All 1-Wire® devices, including iButton® devices, contain an 8-byte unique registration number in read-only memory (ROM). This registration number is used as a unique network address on a 1-Wire bus. To ensure data communication integrity, one byte […]
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 […]
Bus Pirate v3.8 free PCB build
@ursudima tweeted picture of his free Bus Pirate v3.8 PCB build. The Bus Pirate is an open source hacker multi-tool that talks to electronic stuff. If you build a free PCB we’ll send you another one! Blog about it, post a picture on Flicker, whatever – we’ll send you a coupon code for the […]
Teensy audio library gets S/PDIF support
Paul over at DorkbotPDX has written an article on Teensy Audio Library with S/PDIF support: Thanks to the amazing effort of Frank Boesing, the Teensy Audio Library now has native S/PDIF output. Using a $1 TOSLINK connector, or just a red LED, you can get optical S/PDIF digital audio output.
TinySensor server
Steve’s TinySensor server project, that is available at Github: Well after almost a year I decided it was time to update this project with improvements to both its hardware and software. On the hardware side, the server is still the original Raspberry Pi model B, but I’ve mounted the nRF24L01+ radio on a neat little Slice […]
LiTiny- A Tiny LiIon charger for most things battery
Rohit Gupta made this LiTiny project, a tiny LiIon charger: In the end I had a LiIon charger capable of charging batteries @700mA restricted due to thermal dissipation limits of home made PCBs. Project details at Rohit’s blog.
DIY soldering station
MatthiasW over at DebuggingLab posted his DIY Weller station clone project, that is available at Github: At the fpv-community.de Forum I read about a DIY Weller station. Basically an Arduino shield to drive a Weller soldering tip. As there is not much to it, the board simply contains an precision OpAmp, a power MOSFET, 2 buttons […]
EAGLE BOM generation script
Dilshan Jayakody writes: This is a quick post about EAGLE parts list generation script which I was written to replace existing “part2html.ulp”. This script generates more organized and detailed BOM HTML file and it can directly replace “part2html.ulp”. This script is tested with EAGLE 6.6.0, but it can also work with older versions of EAGLE […]
#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 […]
DIY laser diode driver | Constant current source
GreatScottLab’s instructable on how to make your own constant current source and how to get a ‘burning’ laser diode: In this project I will show you how I extracted a laser diode from a DVD Burner which should have the power to ignite a match. In order to power the diode correctly I will also […]