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Contents
Vol.35, No.12
December 2022
14 James Webb Space Telescope
The James Webb Space Telescope (JWST) is the newest and most
advanced telescope yet. It was launched on December 25th, 2021 with the
goal of gathering information on the universe.
By Dr David Maddison
Space exploration feature
48 Jaycar QC1938 Oscilloscope
Jaycar’s QC1938 two-channel, 100MHz digital oscilloscope was released
just a few months ago, with many handy features at a low cost.
By Tim Blythman
Test equipment review
76 nRF5340 DK Development Board
Pages 31 & 40
Dual-channel
Power Supply for
BREADBOARDS
dual- channel oscilloscope
Jaycar QC1938
Nordic Semiconductor’s nRF5340 DK is a development board with a dualcore ARM chip. It’s Arduino-compatible and is a good starting point for
designing products with Bluetooth, NFC or other wireless communications.
By Tim Blythman
Microcontroller module review
31 Dual-channel Breadboard PSU
This power supply is designed to help you take the mess out when
prototyping new designs on a breadboard. It plugs straight into a
breadboard’s power rails and has two adjustable current-limited outputs.
By Tim Blythman
Power supply project
Page 48
Page 62
40 Breadboard PSU Display Adaptor
Combine the Breadboard PSU from above with this Display Adaptor to show
lots of handy data, such as the set and actual voltages and currents. It even
includes extra voltmeter and ammeter channels for analysis.
By Tim Blythman
Power supply project
62 Active Monitor Speakers, Part 2
This month, we cover how to build the power supply, prepare the chassis
and arrange the wiring for the Active Crossover Amplifier. Plus, there’s a
section to help troubleshoot most problems that could occur.
By Phil Prosser
Audio project
81 Digital Boost Regulator
The multi-tasking Digital Boost Regulator can generate an adjustable
voltage from 5V to 20V without a dedicated boost chip. This is possible due
to its use of a PIC16F1846 microcontroller.
By Tim Blythman
Microcontroller project
Active Monitor Speakers
with optional subwoofer
Digital Boost
Regulator
Page 81
2
Editorial Viewpoint
88
Online Shop
107
Ask Silicon Chip
4
Mailbag
90
Circuit Notebook
111
Market Centre
112
Advertising Index
112
Notes & Errata
47
Subscriptions
54
Serviceman’s Log
94
1. mmPi add-on for Raspberry Pi
2. Two different positive DC outputs
from a centre-tapped transformer
3. Traverser for model railway
Vintage Television
RCA 621TS TV by Dr. Hugo Holden
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