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Practical Electronics Practical Electronics Practical Electronics Practical Electronics Practical Electronics The UK’s premier electronics, computing and maker magazine The UK’s premier electronics, computing and maker magazine The UK’s premier electronics, computing and maker magazine The UK’s premier electronics, computing and maker magazine The UK’s premier electronics, computing and maker magazine Circuit Surgery Getting an FIR filter algorithm running on a microcontroller Audio Out A proper PCB for building the cascode audio amplifier Net Work Smart meters, new Chinese EVs & Temu 01202 087631 Circuit Surgery Measuring frequency response with a PC sound card Audio Out Three FET-based Class-A Audio Buffer Module PCBs Precision Electronics Circuit Surgery The final instalment Measuring frequency response with a PC sound card, part 2 Audio Out An instrument fuzz box with germanium transistors 3D Printer Filament Dryer Putting it together Circuit Surgery Signal conditioning using op amps. Audio Out Finishing the ‘Transmanium’ germanium fuzz box. Teach-In 12 Part 2: introducing RF components & circuits Energy Harvesting Small amounts of electricity from the environment. Circuit Surgery Compact Hi-Fi Headphone Amp Custom Electric Guitar/ Bass Controls Discrete Ideal Bridge Rectifiers Automatic L/Q Meter PLUS! Techno Talk – the history of breadboarding Cool Beans – a crash course in digital logic and gates Dual Rail Supply Protector – a bipolar electronic fuse www.electronpublishing.com <at>practicalelec 09 ... including a modern ‘crystal’ radio set to build Techno Talk – The history of recording technology Cool Beans – Measuring reaction times & using logic ICs Nikola Tesla – The inventions of the original ‘mad scientist’ www.electronpublishing.com 5MHz, 40A Current Probe Capacitor Discharger 3D Printer Filament Dryer PLUS! Sep 2025 £5.99 9 772632 573030 practicalelectronics <at>practicalelec Part 3: radio transmitters and receivers. 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Jan 2026 £5.99 Techno Talk – ultra-low-power AI chips and routers Cool Beans – multi-digit displays & logic operators Mk2 VSD – assembling the PCB and getting it running www.electronpublishing.com <at>practicalelec 01 9 772632 573030 practicalelectronics Take out a one-year subscription and save more than £10 over the year. Even better – save over £1 per issue if you subscribe for two years – a total saving of £26. 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We accept MasterCard or Visa. (For past issues see the Back Issues page.) SUBSCRIPTION ORDER FORM  6 Months:.UK £33.99, Europe £38.99 (Airmail), Rest of the World £46.99 (Airmail)  1 Year: UK £59.99, Europe £69.99 (Airmail), Rest of the World £84.99 (Airmail)  2 Years: UK £114.99, Europe £129.99 (Airmail), Rest of the World £164.99 (Airmail) To: Practical Electronics Subscriptions PO Box 6337 Bournemouth BH1 9EH United Kingdom Tel: 01202 087631 Email: pesubs<at>selectps.com I enclose payment of £ .............. (cheque/PO in £ sterling only) payable to Select Publisher Services Ltd  Please charge my Visa/Mastercard My card number is: ....................................................................... Please print clearly, and check that you have the number correct Card Security Code .................. Valid From Date........................ (The last 3 digits on or just under the signature strip) Card Ex. Date ...................................... 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