lektor January & February 2021 107Project 2.0
Corrections, Updates and Readers’ Letters
By Ralf Schmiedel (Elektor) and Jens Nickell (Elektor)
interactive
USB to S/PDIF Interface
September/October 2020 issue, page 6 (180027)
The circuit diagram in Figure 5 and the parts list
both give the wrong part number for IC1. The cor-
rect part is the PIC32MX27 0 F256B-50I/SO rather than the PIC-
32MX27 4 F256B-I/SO. The printed circuit board is correct.E-e-e-ternal Blinker
July/August 2020 issue, page 65 (200200)
There is an error in the circuit diagram: T1 to T3
are labelled as BC548C (NPN) transistors, but T3
is shown as a PNP type. T3 should be a PNP type as marked
and a BC558 can be used.How to Take (Successful) Photos of Electronics
July/August 2020 issue, page 44 (200186)
I found the article ‘How to Take (Successful) Photos of Electronics’ a
fascinating read. However, it is possible to reduce the effort involved
somewhat and leave the lens in your magnifier lamp without reducing
the quality of the results. Very low-cost ring lights are available to fit all current SLR
cameras and, despite their price, they are of good quality. In my photography I use a
Fositan RF-550D that is available from Amazon for around £30. The unit comes with
a wide range of adaptors to fit lenses of different diameters. If you are not the lucky
owner of a macro lens then an add-on close-up lens can be used: use +2 dioptres to
be on the safe side. When using the ring light it is necessary to put the camera into
manual mode, setting the aperture and shutter speed by hand. At normal brightness
(setting 0) and ISO 100 I have obtained good results at f/11 and 1/60 s. If the images
are too dark then the ISO setting can be increased to 200. With these values it is also
possible to work without a tripod.
The light works very well in conjunction with my camera (a Canon 80D with 18–55 mm
zoom lens) without having to dig into its more obscure settings. First the appropriate
adaptor ring is threaded onto the front of the lens and then the control box can be
mounted onto the flash bracket. The ring light itself is then attached to the adaptor.
Volker SchmidtNew LCR Meter 50 Hz - 2 MHz
November/December 2020 issue, page 6 (190311)
Due to a technical problem we published an old version of the article in the printed edition, we have to apologize for
this! The PDF on the webpage shows the correct version, free download:
http://www.elektormagazine.com/magazine/elektor-159/59096Questions or Comments?
Do you have questions or comments? Then get in touch with
Elektor by email at [email protected].190381-E-03