Contents
Projects and Circuits
Speech timer for contests & debates 12
by John Clarke
Keep meetings, speeches and events on track with this large-digit timer
SOlar mppt charger & lighting controller – PART 2 24
by John Clarke
Build and set-up procedure for our superb charger/lighting control system
Arduino-based fridge monitor and data logger 30
by Somnath Bera
Track and log temperature/humidity remotely using a 433MHz transmitter
Ingenuity unlimited 34
Sine/square wave oscillator 10-100kHz... Heat trick
Series and Features
Techno talk by Mark Nelson 11
Visible light reveals dark secrets
Meet the mighty micromite 37
by Geoff Graham
Part 2: Input/output and special devices
Net work by Alan Winstanley 44
Traditional Values... Helping hands
Circuit surgery by Ian Bell 46
Direct Digital Synthesis and filtering
PIC n’ MIX by Mike O’Keeffe 50
PICs and the PICkit 3: LED binary clock
EPE product review by Mike Tooley 54
LabNation SmartScope
Interface by Robert Penfold 59
Analogue signal conditioning
MAX’S cool beans by Max The Magnificent 66
Ooh, shiny!… A bit of a Brainiac... Neurotic neurons
ELECTRONIC BUILDING BLOCKS by Julian Edgar 68
High five!
Regulars and Services
Subscribe to EPE and save money 4
EPE – Microchip special offer – NOT TO BE MISSED! 5
Editorial 7
Air wiring... Teach-In 2017... A couple of ooops!
NEWS – Barry Fox highlights technology’s leading edge 8
Plus everyday news from the world of electronics
Microchip reader offer 36
EPE Exclusive – Win one of two Microchip Curiosity PIC32MX470
Development Boards
Farnell element14 OFFER 45
EPE Exclusive – NXP WaRP7 Next Generation Internet Of Things and
Wearable Development Platform
EPE CD ROMS FOR ELECTRONICS 62
A wide range of technical books available by mail order, plus more CD-ROMs
EPE back issues CD-ROM 65
EPE PCB service 70
PCBs for EPE projects
Advertisers index 71
NEXT MONTH! – Highlights of next month’s EPE 72
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