May 30th, 2008

+/- 15V Power Supply

+/- 15V Power Supply

This is a precision ±15V regulator designed on a single side PCB. The original project is based on EB-802 and belongs to zerosoft. The author took the original project and modified it by replacing some of the components with others that are easy-er to find on the market.

The board has a really nice symmetry design and fits nicely into a case. You could use the regulator to power a pre-amp or a headphone amplifier with great results.

+/- 15V Power Supply: [Link]

USB interface adaptor for R/C simulator

This is an USB interface cable for R/C simulator. The device looks like a standard HID joystick for operating system and converts up to 8 PPM channels from transmitter into joystick axes and optionally – buttons. If you know about radio controlled models and their PC simulators like FMS, Aerofly Pro Deluxe, RealFlight G2/G3 and Reflex XTR, and if you are an owner of PPM transmitter box then you definitely know how to use this device.

Basically this is a project for R/C models enthusiasts and it’s helping them simulating the control of their device.

USB interface adaptor for R/C simulator: [Link]

Ericsson GA628 Display Controller

The GA628 display provides a 12 character alphanumeric display , some icons in the second line and power consumption of some 100 uA. It can easily be connected to the hardware, simply by soldering some wires. The only disadvantage is , it needs a 3.3V power supply and something around 5.6V. However, this code and the MSP430 provides a clock for a simple charge pump, realized with 3 diodes and 3 capacitors.

Ericsson GA628 Display Controller: [Link]

AccelR8 - a portable device that can measure acceleration AccelR8 - a portable device that can measure acceleration

This sounds like a fun project but it is a work in progress, so you’ll need either some knowledge to put the pieces missing in place or some patience to wait until its finished by the author. Basically the AccelR8 is a device for measuring acceleration. It can measure +/- 2 g. As it contains a micro-controller, it can also measure time.  This opens up some interesting possibilities. If we have the acceleration and the time, we can find speed (V), as V = a * t.  Also, we can find distance (D) as D = 0.5 * a * t * t.  If we now the mass of the object we are moving, we can also find the force (F) applied, as F = m * a.  And finally, from this we can find the power (P) from P = F * V.

yeah i know, physics 101 you might like it or you might not but using these you can find out some nifty info about your car:

  • Acceleration 0-100 km/t (0-60 mph)
  • Braking distance 100-0 (60-0), and
  • Maximum Horsepower

AccelR8 – a portable device that can measure acceleration: [Link]

RGB LED PWM Control Project

The RGBLED and mRGBLED controllers allow you to control the color of RGBLEDs.  This might sound trivial, but it actually takes a lot of resources to let you be able to set an RGBLED to any color you’d like.  In addition to just lighting an LED up with a given color, these boards also let you install a color or setup transition/animations effects.  They are easily controller via an RS232 connection (serial port) or an SPI connection (logic level).

The boards can be built reasonably inexpensively and there are PC boards available for either model.  All source code for the onboard PIC processor as well as the software for configuring and using the controllers is available.  The protocol is a simple protocol well documented.

I’m currently studying timers and pwm control on AVR’s so i can build my own projects related to controlling RGB LED’s. I hope I’ll get something up soon.

RGB LED PWM Control Project: [Link][via]



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