A milliohm meter is a very handy piece of test equipment. Most hand-held multimeters cannot measure low resistances and bench meters that can, are usually quite expensive. [barbouri] has shared details of his milliohm meter build on his blog post, and it looks pretty nice.
I need a DAC for my AKG K702. However, the more I looked at commercially available a.k.a. “audiophile” products, the more snake oil I smell. So even before I ordered my CEntrance DACPort Slim, I was already looking into how I can reinventing the wheel
I use OSHPark for prototyping PCBs. I decided to use their 4-layer FR-408 stackup simply for an un-broken ground layer. Turns out that the analog signals can easily fit on the top layer, so I allocated the power layer to the negative rail, and the bottom layer to positive rails.
The DAC + Filter module works! It produces reasonably clean line-level audio signal as expected.
Kevin H. Patterson designed this solution for trailer light wiring after installing a towing hitch on his vehicle:
This is a power module designed to control trailer lights based on signals from your vehicle’s lighting circuits. Most vehicles have at least 4 separate circuits: Running (Tail) Lights, Brake, Left Turn, and Right Turn. Most basic trailers have a 4-wire connector with only 3 signals: Running (Tail) Lights, Left Turn, and Right Turn. The trailer does not have a separate circuit for Brake lights; applying the Brake is supposed to light up both the Left and Right Turn signals together.
The board can be purchased on Tindie:
4-Line to 3-Line Combining Tail Light Power Module for 12V Systems
If you’re making a circuit that is designed to plug into a breadboard, you have a problem. Those 0.1″ header pins are square, and the metal leaf contacts inside a solderless breadboard will eventually get bent out of shape. You only need to look at the breadboards in a university electronics lab for evidence of…
thingSoC is an Open Source socket system for IoT development and has just launched a new Crowdy Supply campaign:
Build any IoT or Networked device you can imagine!
The thingSoC Grovey! platform gives you the freedom to choose from hundreds of existing sensors, actuators, and radios to quickly create new electronic systems, in plug together configurations that were not possible before. Easily mix together different CPUs, Radios, and Peripherals, like Servos, Motors, Relays, Sound and Lights, and then program them in your choice of Integrated Development Environments (IDE).
The thingSoC Grovey Series files are available on GitHub:
- TSOC_Teensy3x: Teensy3.x Adapter for the Grove System
- TSOC_GROVEY_ONE: Model “Uno” Arduino Clone for the Grove System
- TSOC_GROVEY_FOUR: Model “Four” PSoC4 mini for the Grove System
- TSOC_GROVEY_WIFI: ESP8266 Wi-Fi Adapter for the Grove System
- TSOC_GROVEY_I2CHUB: I2C Hub/Switch for the Grove System
- TSOC_GROVEY_GPIO: SX1509 GPIO for the Grove System
- TSOC_GROVEY_UART: USB to UART for the Grove System
We are always surprised how much useful hacking gear is in the typical craft store. You just have to think outside the box. Need a hot air gun? Think embossing tool. A soldering iron? Check the stained glass section. Magnification gear? Sewing department. We’ve figured out that people who deal with beads use lots of fine…