Abra AK-10, Руководство пользователя

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Can I use an alternative transformer?
You may use an alternative transformer as long as it respects the following design constraints: The total
voltage cannot exceed 40v and the current must not exceed 1.5A. Failure in doing so will result in the
death of the LM317. You may use a center tapped or common transformer, the connection for a common
transformer would be the DC through hole as the input and center through hole as the return line. You will
not have the AC feature if you use a common 2 wire transformer and if you do change the transformer the
max voltage output will change according to the transformer rating.
Can I change the capacitor values around?
You may change the capacitors to the following values:
C2 100µF R/35V, 220µF R/35V, 470µF R/35V, 1000µF R/35V, 3300µF R/35V, 4700µF R/35V
R/35V: Rated for 35 Volts Max! The higher the capacitance the longer the discharge time.
Why is C2 circle so big?
This allows room for alternative capacitors with a maximum size of the large radial capacitor to be soldered
into, any bigger than the circle results in damaging or limiting the circuit.
For more details please read the “Capacitor subsection” in the theory chapter.
Where can I mount this?
The side holes allow you to mount the power supply with ABRA standoffs where ever you please; alternatively
you may purchase a plastic project box to house your power supply.
Do I need a heat sink for my LM317?
Please read the subsection “Voltage Regulator” in the theory chapter for more details.
Can I change the heat sink for a bigger one?
You may change the heat sink for bigger one. However the size of the current heat sink should be sufficient
if using provided components.
What version is my power supply?
If you look on the top right corner the version number should be printed, if the revision number is not
printed it is the first edition of the power supply.
What happens if I scratch the surface and I see copper?
You must not touch the copper surface when operating it is conductive! Isolate the copper with electrical
tape.
Why am I getting more than 18 volts?
Please measure the output of the transformer with AC selected and the fuse of your measuring instrument
rated at 1A or more. The result is the approximate maximum voltage you will receive at the output. Ensure
when measuring the wire orientation is the blue wire and return line (black wire).
Which pin do I connect for the potentiometer?
Please connect the potentiometer facing outwards.