Silicon ChipContents - July 1990 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: The story of electrical energy
  4. Vintage Radio: How to solve unusual problems by John Hill
  5. Review: AR950 100-Channel Scanner by Garry Cratt
  6. Project: Digital Sine/Square Wave Generator; Pt.1 by John Clarke
  7. Project: Alarm Keypad & Combination Lock by Greg Swain
  8. Project: Build An Elegant Electronic Die by Darren Yates
  9. Serviceman's Log: The dangers of a quick fix by The TV Serviceman
  10. Back Issues
  11. Feature: The Story Of Electrical Energy by Bryan Maher
  12. Feature: Waveform Generation Using A PC, Pt.4 by Steve Payor
  13. Feature: Computer Bits by Jennifer Bonnitcha
  14. Project: Low Cost Dual Power Supply by John Crichton
  15. Feature: Amateur Radio by Garry Cratt, VK2YBX
  16. Market Centre
  17. Advertising Index
  18. Subscriptions
  19. Outer Back Cover

This is only a preview of the July 1990 issue of Silicon Chip.

You can view 49 of the 104 pages in the full issue, including the advertisments.

For full access, purchase the issue for $10.00 or subscribe for access to the latest issues.

Items relevant to "Digital Sine/Square Wave Generator; Pt.1":
  • Digital Sine/Square Wave Generator PCB patterns [04108901/2] (Free)
  • Silicon Chip article scan, July 1990 - Digital Sine/Square Wave Generator; Pt.1 (AUD $10.00)
Articles in this series:
  • Digital Sine/Square Wave Generator; Pt.1 (July 1990)
  • Digital Sine/Square Wave Generator; Pt.2 (August 1990)
Articles in this series:
  • The Technology Letters, Pt.2 (January 1989)
  • The Story Of Electrical Energy (July 1990)
  • The Story Of Electrical Energy; Pt.2 (August 1990)
  • The Story Of Electrical Energy; Pt.3 (September 1990)
  • The Story Of Electrical Energy; Pt.4 (October 1990)
  • The Story Of Electrical Energy; Pt.5 (November 1990)
  • The Story Of Electrical Energy; Pt.6 (December 1990)
  • The Story Of Electrical Energy; Pt.7 (January 1991)
  • The Story Of Electrical Energy; Pt.8 (February 1991)
  • The Story Of Electrical Energy; Pt.9 (March 1991)
  • The Story Of Electrical Energy; Pt.10 (May 1991)
  • The Story Of Electrical Energy; Pt.11 (July 1991)
  • The Story Of Electrical Energy; Pt.12 (August 1991)
  • The Story Of Electrical Energy; Pt.13 (September 1991)
  • The Story Of Electrical Energy; Pt.14 (October 1991)
  • The Story Of Electrical Energy; Pt.15 (November 1991)
  • The Story Of Electrical Energy; Pt.16 (December 1991)
  • The Story Of Electrical Energy; Pt.17 (January 1992)
  • The Story Of Electrical Energy; Pt.18 (March 1992)
  • The Story Of Electrical Energy; Pt.19 (August 1992)
  • The Story of Electrical Energy; Pt.20 (September 1992)
  • The Story Of Electrical Energy; Pt.21 (November 1992)
  • The Story Of Electrical Energy; Pt.22 (January 1993)
  • The Story of Electrical Energy (April 1993)
  • The Story Of Electrical Energy; Pt.24 (May 1993)
  • The Story Of Electrical Energy; Pt.24 (June 1993)
Articles in this series:
  • Computer Bits (February 1990)
  • Computer Bits (March 1990)
  • Waveform Generation Using A PC, Pt.3 (May 1990)
  • Waveform Generation Using A PC, Pt.4 (July 1990)
Articles in this series:
  • Computer Bits (May 1990)
  • Computer Bits (June 1990)
  • Computer Bits (July 1990)
  • Computer Bits (August 1990)
  • Computer Bits (September 1990)
Articles in this series:
  • Amateur Radio (November 1987)
  • Amateur Radio (December 1987)
  • Amateur Radio (February 1988)
  • Amateur Radio (March 1988)
  • Amateur Radio (April 1988)
  • Amateur Radio (May 1988)
  • Amateur Radio (June 1988)
  • Amateur Radio (July 1988)
  • Amateur Radio (August 1988)
  • Amateur Radio (September 1988)
  • Amateur Radio (October 1988)
  • Amateur Radio (November 1988)
  • Amateur Radio (December 1988)
  • Amateur Radio (January 1989)
  • Amateur Radio (April 1989)
  • Amateur Radio (May 1989)
  • Amateur Radio (June 1989)
  • Amateur Radio (July 1989)
  • Amateur Radio (August 1989)
  • Amateur Radio (September 1989)
  • Amateur Radio (October 1989)
  • Amateur Radio (November 1989)
  • Amateur Radio (December 1989)
  • Amateur Radio (February 1990)
  • Amateur Radio (March 1990)
  • Amateur Radio (April 1990)
  • Amateur Radio (May 1990)
  • Amateur Radio (June 1990)
  • Amateur Radio (July 1990)
  • The "Tube" vs. The Microchip (August 1990)
  • Amateur Radio (September 1990)
  • Amateur Radio (October 1990)
  • Amateur Radio (November 1990)
  • Amateur Radio (December 1990)
  • Amateur Radio (January 1991)
  • Amateur Radio (February 1991)
  • Amateur Radio (March 1991)
  • Amateur Radio (April 1991)
  • Amateur Radio (May 1991)
  • Amateur Radio (June 1991)
  • Amateur Radio (July 1991)
  • Amateur Radio (August 1991)
  • Amateur Radio (September 1991)
  • Amateur Radio (October 1991)
  • Amateur Radio (November 1991)
  • Amateur Radio (January 1992)
  • Amateur Radio (February 1992)
  • Amateur Radio (March 1992)
  • Amateur Radio (July 1992)
  • Amateur Radio (August 1992)
  • Amateur Radio (September 1992)
  • Amateur Radio (October 1992)
  • Amateur Radio (November 1992)
  • Amateur Radio (January 1993)
  • Amateur Radio (March 1993)
  • Amateur Radio (May 1993)
  • Amateur Radio (June 1993)
  • Amateur Radio (July 1993)
  • Amateur Radio (August 1993)
  • Amateur Radio (September 1993)
  • Amateur Radio (October 1993)
  • Amateur Radio (December 1993)
  • Amateur Radio (February 1994)
  • Amateur Radio (March 1994)
  • Amateur Radio (May 1994)
  • Amateur Radio (June 1994)
  • Amateur Radio (September 1994)
  • Amateur Radio (December 1994)
  • Amateur Radio (January 1995)
  • CB Radio Can Now Transmit Data (March 2001)
  • What's On Offer In "Walkie Talkies" (March 2001)
  • Stressless Wireless (October 2004)
  • “Degen” Synthesised HF Communications Receiver (January 2007)
  • WiNRADiO: Marrying A Radio Receiver To A PC (January 2007)
  • PICAXE-08M 433MHz Data Transceiver (October 2008)
  • Half-Duplex With HopeRF’s HM-TR UHF Transceivers (April 2009)
  • Dorji 433MHz Wireless Data Modules (January 2012)
JULY 1990 FEATURES 8 Review: AR950 100-Channel Scanner by Garry Cratt Mobile unit covers many bands 52 The Story Of Electrical Energy by Bryan Maher Pt.1: coal burning power stations This sine/square wave Generator uses high speed CMOS ICs & a digital filter IC to produce sine & square waves from 0.1Hz-500kHz. It also features a 4-digit frequency readout. Turn to page 16. THIS KEYPAD combination lock can be used to control a burglar alarm or activate a solenoid-operated door strike - see page 28. 64 Waveform Generation Using A PC, Pt.4 by Steve Payor PC board plus software PROJECTS TO BUILD 16 Digital Sine/Square Wave Generator by John Clarke Covers the frequency range from 0.1Hz-500kHz 28 Alarm Keypad & Combination Lock by Greg Swain Turns your house or car alarm on & off 34 Build An Elegant Electronic Die by Darren Yates Simulates the roll of a real die & turns itself off 78 Low Cost Dual Power Supply by John Crichton Provides switched outputs from ± 3V to ± 18V SPECIAL COLUMNS IF YOU KEEP anything long enough .. .. well, you know the rest. The Serviceman's hoarding tendencies sure came to the rescue this month. His stories start on page 40. 6 Vintage Radio by John Hill Remote Control How to solve unusual problems 40 Serviceman ' s Log by the TV Serviceman The dangers of a quick fix 72 Computer Bits by Jennifer Bonnitcha What to do when your computer goes bung; Pt.3 Space restrictions have prevented us from publishing Bob Young's Remote Control column this month. The column will return with the next issue. 88 Amateur Radio by Garry Cratt Weather fax - list of frequencies DEPARTMENTS 2 Publisher's Letter 3 37 60 50 Mailbag Bookshelf Circuit Notebook Back Issues 94 100 103 104 Product Showcase Ask Silicon Chip Market Centre Subscription Page HAS SOMEONE PINCHED the dice from the Monopoly game? Replace them with this electronic die. It uses just two CMOS ICs and simulates the roll of a real die. See page 34. JULY 1990 1