Technology

Speed controller circuit for radio controlled boats…

Speed controller circuit for radio controlled boats…

Modelboat“This application note describes a circuit designed to control the speed of a dc motor used in radio-controlled boats. The electronic speed controller (ESC) is a “no-brake, forward-only” controller. I wanted to keep the part count low and the circuit simple so a couple features were sacrificed. The circuit does not have: over-current protection, over-temp protection, polarity protection, or over/under voltage protection. All the parts can be obtained from digikey distributors. The circuit was designed with a popular 12-cell model boat motor in mind (graupner speed 700). This project was my first attempt at using Bascom-avr and Atmel microcontrollers. ” Thanks JasonR! Link.

Use PNGs to make real 3D parts out of metal and plastic…

Use PNGs to make real 3D parts out of metal and plastic…

Bluesaw-MedWow, now you can upload a PNG image and have a part cut and sent to you, made from metal or plastic, no need to use CAD software. Simon writes“I’ve just added support for PNG images. I’m really proud of this new feature, as it will allow even people who don’t know how to use CAD software to start creating with Big Blue Saw. There are still a couple of quirks to work out over the next few weeks, and the help files will need to be updated, but this feature was much needed.” Link.