Silicon ChipOuter Front Cover - July 2021 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Software: too many bugs, too many updates
  4. Mailbag
  5. Feature: The 2020 mission to Mars by Dr David Maddison
  6. Project: 20A DC Motor Speed Controller by John Clarke
  7. Feature: How USB Power Delivery (USB-PD) works by Andrew Levido
  8. Feature: El Cheapo Modules: USB-PD chargers by Jim Rowe
  9. Project: Model Railway Level Crossing by Les Kerr
  10. Circuit Notebook: Coded door buzzer by Benabadji Mohammed Salim
  11. Circuit Notebook: Adding shuffle feature to low-cost MP3 player module by Les Kerr
  12. Circuit Notebook: DIY pulse oximeter by Bera Somnath
  13. Project: Silicon Labs-based FM/AM/SW Digital Radio by Charles Kosina
  14. Review: Tecsun PL-990 radio receiver by Ross Tester
  15. Project: Advanced GPS Computer – Part 2 by Tim Blythman
  16. Serviceman's Log: I’ve repaired planes before, but never tanks by Dave Thompson
  17. Vintage Radio: The Rowe AMI JAL-200 jukebox by Jim Greig
  18. PartShop
  19. Product Showcase
  20. Ask Silicon Chip
  21. Market Centre
  22. Advertising Index
  23. Notes & Errata: Advanced GPS Computer, June 2021; Mini Arcade Pong, June 2021; Refined Full-Wave Motor Speed Controller, April 2021; USB Flexitimer, June 2018
  24. Outer Back Cover

This is only a preview of the July 2021 issue of Silicon Chip.

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Items relevant to "20A DC Motor Speed Controller":
  • 20A DC Motor Speed Controller PCB [11006211] (AUD $7.50)
  • PIC16F1459-I/P programmed for the 20A DC Motor Speed Controller [1100621A.HEX] (Programmed Microcontroller, AUD $10.00)
  • Firmware and source code for the 20A DC Motor Speed Controller [1100621A] (Software, Free)
  • 20A DC Motor Speed Controller PCB pattern (PDF download) [11006211] (Free)
Articles in this series:
  • The History of USB (June 2021)
  • How USB Power Delivery (USB-PD) works (July 2021)
Articles in this series:
  • El Cheapo Modules From Asia - Part 1 (October 2016)
  • El Cheapo Modules From Asia - Part 2 (December 2016)
  • El Cheapo Modules From Asia - Part 3 (January 2017)
  • El Cheapo Modules from Asia - Part 4 (February 2017)
  • El Cheapo Modules, Part 5: LCD module with I²C (March 2017)
  • El Cheapo Modules, Part 6: Direct Digital Synthesiser (April 2017)
  • El Cheapo Modules, Part 7: LED Matrix displays (June 2017)
  • El Cheapo Modules: Li-ion & LiPo Chargers (August 2017)
  • El Cheapo modules Part 9: AD9850 DDS module (September 2017)
  • El Cheapo Modules Part 10: GPS receivers (October 2017)
  • El Cheapo Modules 11: Pressure/Temperature Sensors (December 2017)
  • El Cheapo Modules 12: 2.4GHz Wireless Data Modules (January 2018)
  • El Cheapo Modules 13: sensing motion and moisture (February 2018)
  • El Cheapo Modules 14: Logarithmic RF Detector (March 2018)
  • El Cheapo Modules 16: 35-4400MHz frequency generator (May 2018)
  • El Cheapo Modules 17: 4GHz digital attenuator (June 2018)
  • El Cheapo: 500MHz frequency counter and preamp (July 2018)
  • El Cheapo modules Part 19 – Arduino NFC Shield (September 2018)
  • El cheapo modules, part 20: two tiny compass modules (November 2018)
  • El cheapo modules, part 21: stamp-sized audio player (December 2018)
  • El Cheapo Modules 22: Stepper Motor Drivers (February 2019)
  • El Cheapo Modules 23: Galvanic Skin Response (March 2019)
  • El Cheapo Modules: Class D amplifier modules (May 2019)
  • El Cheapo Modules: Long Range (LoRa) Transceivers (June 2019)
  • El Cheapo Modules: AD584 Precision Voltage References (July 2019)
  • Three I-O Expanders to give you more control! (November 2019)
  • El Cheapo modules: “Intelligent” 8x8 RGB LED Matrix (January 2020)
  • El Cheapo modules: 8-channel USB Logic Analyser (February 2020)
  • New w-i-d-e-b-a-n-d RTL-SDR modules (May 2020)
  • New w-i-d-e-b-a-n-d RTL-SDR modules, Part 2 (June 2020)
  • El Cheapo Modules: Mini Digital Volt/Amp Panel Meters (December 2020)
  • El Cheapo Modules: Mini Digital AC Panel Meters (January 2021)
  • El Cheapo Modules: LCR-T4 Digital Multi-Tester (February 2021)
  • El Cheapo Modules: USB-PD chargers (July 2021)
  • El Cheapo Modules: USB-PD Triggers (August 2021)
  • El Cheapo Modules: 3.8GHz Digital Attenuator (October 2021)
  • El Cheapo Modules: 6GHz Digital Attenuator (November 2021)
  • El Cheapo Modules: 35MHz-4.4GHz Signal Generator (December 2021)
  • El Cheapo Modules: LTDZ Spectrum Analyser (January 2022)
Items relevant to "Model Railway Level Crossing":
  • Model Railway Level Crossing PCB [09108211] (AUD $5.00)
  • Pair of PIC12F617-I/P chips for the Model Railway Level Crossing [0910821A/B/C.HEX] (Programmed Microcontroller, AUD $15.00)
  • ISD1820-based voice recording and playback module (Component, AUD $5.00)
  • Firmware, source code and sound recording for the Model Railway Level Crossing [0910211A-C] (Software, Free)
  • Model Railway Level Crossing PCB pattern (PDF download) [09108211] (Free)
  • Mechanical diagrams and label artwork for the Railway Level Crossing (PDF Download) (Panel Artwork, Free)
  • PIC12F617-I/P programmed for the Model Railway Level Crossing [0910821A.HEX] (Source component, AUD $10.00)
  • PIC12F617-I/P programmed for the Model Railway Level Crossing [0910821B.HEX] (Source component, AUD $10.00)
  • PIC12F617-I/P programmed for the Model Railway Level Crossing [0910821C.HEX] (Source component, AUD $10.00)
Videos relevant to "Model Railway Level Crossing":
  • Level Crossing
Items relevant to "Coded door buzzer":
  • Firmware for the Coded Door Buzzer (Software, Free)
Items relevant to "Adding shuffle feature to low-cost MP3 player module":
  • Firmware for adding a shuffle feature to a low-cost MP3 player module (Software, Free)
Items relevant to "DIY pulse oximeter":
  • Firmware for the DIY pulse oximeter (Software, Free)
Items relevant to "Silicon Labs-based FM/AM/SW Digital Radio":
  • SiLabs FM/AM/SW Digital Radio PCB [CSE210301C] (AUD $7.50)
  • ATmega328P programmed with the firmware for the SiLabs FM/AM/SW Digital Radio [CSE210301.HEX] (Programmed Microcontroller, AUD $10.00)
  • Si4732-A10 AM/FM/SW/LW/RDS Radio Receiver IC (Component, AUD $20.00)
  • Pulse-type rotary encoder with pushbutton and 18t spline shaft (Component, AUD $3.00)
  • Firmware and source code for the SiLabe FM-AM-SW Digital Radio [CSE210301.HEX] (Software, Free)
  • SiLabs FM/AM/SW Digital Radio PCB pattern (PDF download) [CSE210301C] (Free)
  • Drilling/cutting diagrams and front panel artwork for the SiLabs-based FM-AM-SW Digital Radio (Free)
Items relevant to "Advanced GPS Computer – Part 2":
  • Advanced GPS Computer PCB [05102211] (AUD $7.50)
  • PIC32MX170F256B-50I/SP programmed for the Advanced GPS Computer [0510221A.hex] (Programmed Microcontroller, AUD $15.00)
  • DS3231 real-time clock IC (SOIC-16) (Component, AUD $7.50)
  • MCP4251-502E/P dual 5kΩ digital potentiometer (Component, AUD $3.00)
  • VK2828U7G5LF TTL GPS/GLONASS/GALILEO module with antenna and cable (Component, AUD $25.00)
  • Micromite LCD BackPack V3 complete kit (Component, AUD $75.00)
  • Matte/Gloss Black UB3 Lid for Advanced GPS Computer (BackPack V3) (PCB, AUD $5.00)
  • Firmware for the Advanced GPS Computer [0510221A.HEX] (Software, Free)
  • Advanced GPS Computer PCB pattern (PDF download) [05102211] (AUD $15.00)
  • Advanced GPS Computer box cutting diagram and lid dimensions (Panel Artwork, Free)
Articles in this series:
  • Advanced GPS Computer - Part 1 (June 2021)
  • Advanced GPS Computer – Part 2 (July 2021)

Purchase a printed copy of this issue for $10.00.
JULY 2021 ISSN 1030-2662 07 The VERY BEST DIY Projects! 9 771030 266001 $995* NZ $1290 INC GST INC GST 26 20A DC Motor Speed Controller 36 USB Power Delivery: how it works 46 Level Crossing for Model Railways 64 FM/AM/SW Digital Radio using Silicon Labs ICs Mars Mission Perseverance & Ingenuity siliconchip.com.au Australia’s electronics magazine July 2021  1