Flipdots: Unterschied zwischen den Versionen

Zeile 65:

Achtung, das Panel braucht beim Schalten extrem viel Strom! Unsere Netzteile hier schaffen das nicht. Mit einem ausreichend großen Kondensator sollte man das ausgleichen können.

And some simple math about the current draw… the panel takes 1.6A while updating for two seconds. You need 3ms per row to switch. It is assumed that the current in the solenoids ~~rises~~ linear. And there are 20 rows. That’s 10 rows per second which means a duty cycle of 0.03 (Ton/Toff).

And some simple math about the current draw… the panel takes 1.6A while updating for two seconds. You need 3ms per row to switch. It is assumed that the current through the solenoids rise linear. And there are 20 rows. That’s 10 rows per second which means a duty cycle of 0.03 (Ton/Toff).

For a short moment the panel pulls 50Amps averaged and 100Amps peak. That's almost impossible for SMPS supply without nice caps.

For a short moment the panel pulls 50Amps averaged and 100Amps peak. That's almost impossible to handle for SMPS supply without nice caps.

And a very rough estimation about the inductance of one coil:

There are 16 coils per row which means one coil pulls 6.25Amps peak. I=U/L*t -> 6.25=24/L*0.003 -> L=22uH