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Master Brick - restarting :-(


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What can cause master brick restarting ?

When i switch my desk lamp http://www.top3dmodels.com/uploads/desk_lamp_sample_solid_main.jpg

in about 15cm from my wires master brick restarts.

It also happend to me while driving DC motor from DC brick (full forward, full backward, and so on)

Both cases are fully reproductable.

How can i prevent this ?


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The reason seems to be EMI (http://en.wikipedia.org/wiki/Electromagnetic_interference)


Especially inductive loads like motors can generate high voltages when switching them off.


Some counter meassures:

Flyback Diode parallel to the motor or parallel to the relais.


Snubber (resistor and capacitor).


See also TF documentation: http://www.tinkerforge.com/en/doc/Hardware/Bricklets/Dual_Relay.html#dual-relay-inductive-load-switching


There is a lot of information in the net about this. Example:




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