New Product in stock: BB-VNH3SP30 full bridge motor driver 30A / 36VDC


BB-VNH3SP30 is full bridge motor driver 30A / 36VDC suitable for driving DC servo motors and gear motors. With spring connectors for quick wiring it’s perfect for motor controlling via Arduino. STATUS LEDs show the bridge current direction.

WII NUNCHUCK projects with Arduino Leonardo AVR-T32U4


WII NUNCHUCK is low cost joystick and 3 axes accelerometer combo which could be read by I2C.

We created UEXT plug-in board which allow WII-NUNCHUCK to be used with any of our development boards with UEXT connector.

Here on this video:

you can see four projects made with WII-NUNCHUCK

1. Mouse – you can move the mouse pointer with Joystick and to use the two buttons as mouse buttons

2. Sound – with the 3 axes accelerometer you can change the pitch of the generated tone

3. Driving two servos with the 3-axes accelerometer

4. Drivinig RGB stripe with MOD-RGB and MOD-WII-NUNCHUCK – as AVR-T32U4 have just one UEXT port we use the UEXTx5 extender.

The demo code is at GitHub:

AVR-T32U4 Arduino Leonardo experiments with knock sensor and servo


This is simple fun project which we build for couple of minutes with materials in the office.

What you need: AVR-T32U4 Arduino Leonardo clone, Breadboard-1 for AVR-T32U4, LiPo battery, some JumperWires, Knock sensor, MS-1.3-9 servo motor, some tape and empty carton box.

Tape the servo in the corner and put on it plastic arm which to rise the box lid, tape the knock sensor to the lid. Connect the servo to D9 and Knock sensor to A0 of AVR-32U4.

The code Knock.ino is on GitHub, as you can see it’s pretty simple, once on A0 is detected level above some threshold (you can experiment what this level is in your case as it depend on how you attach the knock sensor to the box) you move the servo motor up wait some time and move it back.

Watch the video in action:

Then one of our practicing students at Olimex decided to make code which will open the box only if you knock in some secret sequence of long and short knocks and the code is also on Github (please be gentle the code is crappy but written by enthusiast with no much experience).

The new video for the password knock is here:

AVR-T32U4 Arduino Leonardo Analog Servo motor drive demo


We stock now 6 types of Analog Servo drive motors

The motor parameters are encoded in their names:

MS-1.3-9 means – Servo-Motor with 1.3 force and 9 gram weight.
MS-R-1.3-9 means Servo-Motor with 360 degree angle and 1.3 force and 9 gram weight.

All servo motors came with various exchangable plastic arms:


Separately are available aluminum ARMs which can snap to the bigger 3.2 and 6 motors, these are so powerful than can open and close drawers.

Adruino have special library for servo drive just notice that the normal servos will accept angle between 0 and 120 degree only, while the R type will accept from 0 to 360 degree.

The demo code is on GitHub:

You can see the code running on this video