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sinara-hw / Stabilizer_Piezo_Driver

SImple piezo driver mezzanine for Stabilizer
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Testing v1.0.2 #7

Open JakubKajzer opened 3 years ago

JakubKajzer commented 3 years ago

When starting the board, it turned out that the converter could not be set to a voltage higher than 160V. This was due to the opening of the transistors in the voltage control system of the converter during shorting the VADJ and VREF pin. obraz This could be changed to R2R DAC controlled by a switch like in voltage offset selector.

JakubKajzer commented 3 years ago

The next problem is with the overtemperature indicator. The LM358 can't rail-to-rail and due to this, the upper voltage is only 1.26V. It can be changed to LMV358 (pin to pin compatible).

JakubKajzer commented 3 years ago

The offset voltage selector works well, but it gives max value when you choose "0" on the hexadecimal switch and min value when choosing "F". This is quite unintuitive.

JakubKajzer commented 3 years ago

I noticed, that the device draws around 1A from 12V supply during startup. Maybe a slow start circuit should be added.