DCC Impulses Column - 2
(2 inputs, one + and one - output) or can be made from four
discrete diodes. Generally, I recommend the module, for small
size and ease of construction (3).
Rectifiers have two primary specifications, voltage and current.
The rated voltage is properly known as Peak Inverse (reverse)
Voltage (PIV) and is the maximum voltage that the rectifier is
designed to withstand backwards across the diode. Back to
my water analogy from my December 2012
(
mrhmag.com/
magazine/mrh-2012-12-dec/di_basic-electronics-for-dcc
)
Basic Electronics column. PIV is the maximum pressure that
the check valve will withstand when the water is trying to flow
against the closed valve.
Rectifiers are usually rated at 50 volts or higher. Since this
exceeds the maximum DCC voltage, most any will work just
fine, voltage wise.
The sum of all the current drawn through the rectifier should
be less than the rating on the rectifier. One amp is about the
minimum current rating for a rectifier and works in the vast
majority of DCC uses. In the case of this circuit, there will be
2
2: Power supply schematic.
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