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  • Update, July 20
  • Log     from Improve the Haber process
  • 1) Made final board schematic2) Software is coming along3) Lots of features added to board/software4) Semi automated horn tuning seems to work5) Horn blanks can be cut with a table saw6) Power control works, but not very well. Probably due to noise.Added...

  • Initial setup and breadboard
  • Log     from YAETM
  • Initial wiring was pretty much the same thing you would see anywhere. I could not find my 3.3v ttl converter so I used a Red LED and a 10k resistor on the RX of the ESP8266 (TX from usb-ttl converter) to try and stay in the 3.3v ballpark. I was able...

  • ESP8266 Arrived
  • Log     from SubPos Positioning System
  • My ESP8266 order arrived in one piece (thankfully, since they just sent it in a standard paper envelope...).Just waiting on the Microchip PIC16LF1824, which should arrive tomorrow and then I can get to work on using that to create each node. The PIC16LF1824...

  • How To Use the Node
  • Log     from SubPos Positioning System
  • Whether you are using the revision 01/02 or the newer (in development) revision 03 Node, they are all easily configured via a serial connection.If you are using the 01/02 Nodes, you will need a UART(TTL) to USB converter to configure it via a serial...

  • Adding Bluetooth
  • Log     from NeoPixel SmartWatch
  • Finally, after over a month of waiting, my HC-06 bluetooth module came in from China. For once it truly was 'plug and play', using the Serial1 interface for data transmission over the tx/rx pins. There are a couple apps on the play store that allow you...

  • Controlling the motors
  • Log     from Reflecting the sun into your home
  • Okay, we've found a motor, and a step up converter to provide power to it. Now we need to control it.A linear motor has two terminals, + and -.If you apply a suitably high DC voltage between the two terminals, the motor will start rotating. + and - are...

  • Final bits
  • Log     from Reflecting the sun into your home
  • Ok we need some way to detect how many rotations the shaft makes, a CPU board, and a Real Time Clock (RTC). We should have some Flash memory as well to store our data points.Photo-Interruptor CircuitAn easy way of detecting shaft rotation is by using...

  • The brain
  • Log     from DIY Quadrocopter
  • The MPU-6000 IMU (inertial measurement unit) board was not to get for a reasonable price.Instead, I got an MPU-6050 breakout board for 2,55 € in China.Unfortunately, the MPU-6000 and MPU-6050 are not 100% compatible. Thus, the MPU-6050, for example,...

  • PCBs with an UV-laser
  • Log     from Yet another laser engraver / cutter
  • Recently I bought a 100 mW UV laser module (405 nm) with power supply (TTL capable) on eBay from laserlands.com to plot PCBs on a printed circuit board with a photo sensitive layer on it. To develop the photosensitive layer 10 - 20 mW of laser power...

  • The smoke test
  • Log     from Reverse engineering a Life Optics M5/Leica HM500
  • In order to power up the varioscope the correct supply voltage had to be determined. I had originally assumed that supply the voltage would be 4.8V based on a what seemed to be 4 cell NiMH pack in the manual. However, performing a Google image search...

  • First steps
  • Log     from Overly complicated laboratory power supply
  • This project started a few weeks ago, in fact. I took rotary dial and partially breadboarded the dialing circuit.No big deal, just a little bit of sequential logic and contact debouncing. The dialing circuit alone contains 14 ICs and it will grow up...

  • Update April 2015
  • Log     from BlackFin DSP Arduino Board
  • HardwareAs you can see from the photographs most of the board is populated. Will fit the Audio Codec when I am happy that all the rest of it is relatively stable. As you can see from the photographs my board design/layout skills are substantially better...
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