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Practical Electronics PCB SERVICE PROJECT AUGUST 2025 CODE Micromite Explore-40 PCB...................................................... 07106241 Micromite Explore-40 Audio Breakout PCB........................... 07101222 8-Channel Learning IR Remote Receiver PCB....................... 15108241 FlexiDice PCB set..................................................................... 08107241-2 JULY 2025 Compact OLED Clock & Timer PCB....................................... 19101231 180-230V DC Motor Speed Controller PCB........................... 11104241 Mains Power-Up Sequencer PCB (same as Feb ‘25)............. 10108231 JUNE 2025 Styloclone (case version)......................................................... 23106241 Styloclone (standalone version)............................................... 23106242 Dual Mini LED Dice (TH LEDs, white solder mask)................. 08103241W Dual Mini LED Dice (TH LEDs, black solder mask)................. 08103241B Dual Mini LED Dice (SMD LEDs, white solder mask)............. 08103242W Dual Mini LED Dice (SMD LEDs, black solder mask)............. 08103242B Dual Hybrid Supply regulator board........................................ 18107211 Dual Hybrid Supply front panel control board......................... 18107212 Dual Hybrid Supply CPU board............................................... 01106193 Dual Hybrid Supply LCD adaptor............................................ 01106196 MAY 2025 Skill Tester 9000........................................................................ 08101241 USB-C Serial Adaptor (black solder mask)............................. 24106241 DC Supply Protector (SMD adjustable version)...................... 08106241 DC Supply Protector (TH adjustable version)......................... 08106242 DC Supply Protector (TH fixed version).................................. 08106243 APRIL 2025 ESR Test Tweezers PCB set.................................................... 04105241+ Fan Speed Controller Mk2....................................................... 10104241 Calibrated Microphone (SMD version).................................... 01108231 Calibrated Microphone (TH version)........................................ 01108232 MARCH 2025 Pico Gamer............................................................................... 08104241 Compact Frequency Divider.................................................... 04112231 FEBRUARY 2025 Laser Communicator transmitter............................................. 16102241 Laser Communicator receiver.................................................. 16102242 Model Railway Points Controller transmitter........................... 09101241 Model Railway Points Controller receiver................................ 09101242 Mains Power-Up Sequencer.................................................... 10108231 JANUARY 2025 USB to PS/2 Converter for VGA PicoMite.............................. 07111231 ps2x2pico USB to PS/2 Converter.......................................... 07111232 Compact Microphone Preamplifier (case version).................. 01110231 Compact Microphone Preamplifier (integrated version)......... 01110232 DECEMBER 2024 PRICE £2.99 £2.99 £5.99 £4.99 £4.99 £9.99 £11.99 £6.99 £7.99 £2.99 £2.99 £2.99 £2.99 £5.99 £2.99 £3.99 £2.99 £9.99 £2.99 £3.99 £3.99 £3.99 £5.99 £4.99 £3.99 £3.99 £9.99 £4.99 £3.99 £3.99 £3.99 £2.99 £11.99 £3.99 £3.99 £5.99 £5.99 Raspberry Pi Clock Radio PCB pair........................................ 19101241/2 £12.99 VGA PicoMite (blue)................................................................. 07107221 £5.99 Secure Remote Switch receiver.............................................. 10109231 £4.99 Secure Remote Switch transmitter (module version)............. 10109232 £2.99 Secure Remote Switch transmitter (discrete version)............. 10109233 £2.99 PROJECT NOVEMBER 2024 CODE Ideal Diode Bridge Rectifiers (28mm square).......................... 18101241 Ideal Diode Bridge Rectifiers (22mm square).......................... 18101242 Ideal Diode Bridge Rectifiers (4-pin SIL)................................. 18101243 Ideal Diode Bridge Rectifiers (tiny SOT-23)............................. 18101244 Ideal Diode Bridge Rectifiers (standalone SMD)..................... 18101245 Ideal Diode Bridge Rectifiers (standalone TH; 2oz copper)... 18101246 Multi-channel Volume Control (volume PCB).......................... 01111221 Multi-channel Volume Control (control PCB).......................... 01111222 Multi-channel Volume Control (OLED PCB, black)................. 01111223 OCTOBER 2024 TQFP-32 Programming Adaptor............................................. 24108231 TQFP-44 Programming Adaptor............................................. 24108232 TQFP-48 Programming Adaptor............................................. 24108233 TQFP-64 Programming Adaptor............................................. 24108234 2m VHF FM Test Signal Generator.......................................... 06107231 SEPTEMBER 2024 PIC Programming Adaptor...................................................... 24105231 Salad Bowl Speaker crossover................................................ 01109231 AUGUST 2024 Arduino ESR Meter combined L/C-ESR................................. 04106182 Arduino ESR Meter separate ESR........................................... 04106183 Watering System Controller..................................................... 15110231 PRICE £3.99 £3.99 £3.99 £3.99 £4.99 £6.99 £4.99 £4.99 £4.99 £4.99 £4.99 £4.99 £4.99 £4.99 £4.99 £7.99 £9.99 £7.99 £11.99 JULY 2024 Dynamic NFC Tag (22 × 31mm)............................................... 06101231 £5.95 Dynamic NFC Tag (86 × 54mm)............................................... 06101232 £7.95 Reciprocal Frequency Counter................................................ CSE230101C £8.95 Reciprocal Frequency Counter front panel (black mask)....... CSE230102 £7.95 Pi Pico-based Thermal Camera............................................... 04105231 £6.95 JUNE 2024 Loudspeaker Test Jig............................................................... 04106231 £12.95 MAY 2024 GPS-Disciplined Oscillator....................................................... 04103231 £12.95 Dual RF Amplifier...................................................................... CSE220602A £5.95 Songbird ................................................................................... 08103231 £7.95 APRIL 2024 Basic RF Signal Generator....................................................... CSE221001 £8.99 Basic RF Signal Generator front panel (black solder mask)... CSE220902B £9.99 Silicon Chirp Cricket................................................................. 08101231 £7.99 Test Bench ‘Swiss Army Knife’................................................ 04110221 £9.99 MARCH 2024 Digital Volume Control Potentiometer SMD version............... 01101231 Digital Volume Control Potentiometer through-hole version.. 01101232 Advanced SMD Test Tweezers body....................................... 04106221 Advanced SMD Test Tweezers legs (pair)............................... 04106212 FEBRUARY 2024 Active Mains Soft Starter......................................................... 10110221 JANUARY 2024 Q Meter ................................................................................... CSE220701 Q Meter front panel (black solder mask)................................. CSE220704 Raspberry Pi Pico W BackPack.............................................. 07101221 DECEMBER 2023 Digital Boost Regulator............................................................ 24110224 Dual-Channel Power Supply for Breadboards........................ 04112221 Display Adaptor for the Breadboard PSU............................... 04112222 £8.95 £9.95 £6.95 £7.95 £10.95 £8.95 £7.95 £8.95 £8.95 £11.95 £9.95 PCBs for most recent PE/EPE constructional projects are available. From the July 2013 issue onwards, PCBs with eight-digit codes have silk screen overlays and, where applicable, are double-sided, have plated-through holes, and solder mask. They are similar to photos in the project articles. Earlier PCBs are likely to be more basic and may not include silk screen overlay, be single-sided, lack plated-through holes and solder mask. Always check price and availability in the latest issue or online. A large number of older boards are listed for ordering on our website. In most cases we do not supply kits or components for our projects. For older projects it is important to check the availability of all components before purchasing PCBs. Magazine back issues are available – see https://www.electronpublishing.com/product-category/pe-back-issues-print-and-digital/ 76 Practical Electronics | August | 2025 Double-sided | plated-through holes | solder mask PROJECT NOVEMBER 2023 CODE PRICE LC Meter Mk3........................................................................... CSE220503C £9.95 DC Supply Filter for vehicles.................................................... 08108221 £8.95 Discrete Audio Op Amp PCB................................................... AO1-JUL23 £9.95 Discrete Audio Op Amp PCB + essential components.......... AO2-JUL23 £17.95 OCTOBER 2023 Buck/Boost Charger Adaptor.................................................. 14108221 PIC Breakout Board for SOIC parts........................................ 24110225 PIC Breakout Board for DIP parts........................................... 24110222 AVR64DD32 Breakout board................................................... 24110223 Automatic Train Controller........................................................ 09109221 Chuff Sound module................................................................ 09109222 SEPTEMBER 2023 Mini LED Driver......................................................................... 16106221 New GPS-Synchronised Clock............................................... 19109221 £9.95 £5.95 £5.95 £5.95 £6.95 £6.95 £7.95 £9.95 AUGUST 2023 110dB RF Attenuator............................................................... CSE211003 £9.95 Universal Battery Charge Controller (2023 update)................ 14107192 £9.95 Wide-Range OhmMeter........................................................... 04109221 £12.95 JULY 2023 Multimeter Checker/Calibrator................................................ 04107221 JUNE 2023 Arduino Programmable Load................................................... 04105221 Buck-Boost LED Driver............................................................ 16103221 £8.95 £8.95 Precision AM-FM DDS Signal Generator................................ CSE211002 £14.95 Improved SMD Test Tweezers programmed PIC.................... 0410621PIC £12.95 AO 2x-dual-to-quad through-hole (pack of five)..................... AO1-MAY23 £6.95 AO 2x-dual-to-quad SMD (pack of five).................................. AO2-MAY23 £6.95 AO 2x-single-to-dual through-hole (pack of five).................... AO3-MAY23 £6.95 AO 2x-single-to-dual SMD (pack of five)................................ AO4-MAY23 £6.95 500W Amplifier Module............................................................ see p.22, April 2023 Clipping Indicator (per channel)............................................... 01112211 £7.95 CD Welder Power Supply (one needed).................................. 29103221 £9.95 CD Welder Controller (one needed)......................................... 29103222 £9.95 CD Welder Energy Storage module (several needed)............ 29103223 £7.95 AO Universal Dual Op Amp Board........................................AO1-APR23 £9.95 AO Stereo RIAA precision passives kit for dual op amp.......AO2-APR23 £8.95 FEBRUARY 2023 Tesla Coil driver board.............................................................. 26102221 Tesla Coil potentiometer board................................................ 26102222 Cooling Fan Controller & Loudspeaker Protector................... 01102221 Remote Gate Controller........................................................... 11009121 JANUARY 2023 Classic LED Metronome – 8-LED............................................ 23111211 Classic LED Metronome – 10-LED.......................................... 23111212 Multi-Channel Speaker Protector – 6 channel........................ 01101221 Multi-Channel Speaker Protector – 4 channel........................ 01101222 Remote Control Range Extender – IR-to-UHF....................... 15109212 Remote Control Range Extender – UHF-to-IR....................... 15109211 AO Universal Single Op Amp Board......................................AO1-JAN23 PRICE Hummingbird Amplifier............................................................ 01111211 £9.95 SMD Trainer PCB..................................................................... 29106211A £8.95 SMD Trainer PCB + parts......................................................... 29106211B £13.95 NOVEMBER 2022 USB Cable tester – main PCB................................................. 04108211 £12.95 USB Cable tester – front panel................................................ 04108212 £5.95 USB Cable tester – optional panel.......................................... SC5970 £5.95 Model Railway Carriage Lights – PCB.................................... 09109211 £6.95 AO trnsfmr PCB – standard VTX-A range.......................... VTX-101-007 £6.95 AO trnsfmr PCB – dual-outline VTX102-3001/101-3002......VTX-Dual £6.95 OCTOBER 2022 SMD Test Tweezers – PCB and pair of tweezer arms............ 04106211-2 £11.95 SMD Test Tweezers – programmed PIC12F1572-I/SN.......... 0410621A £7.95 Tele-com............................................................................. 12110211 £12.95 SEPTEMBER 2022 Touchscreen Digital Preamp – main board............................. 01103191 Touchscreen Digital Preamp – adaptor board pair................. 01103192 20A DC Motor Speed Controller.............................................. 11006211 £12.95 £5.95 £9.95 For the many earlier PCBs that we stock please see the PE website: www.electronpublishing.com PE/EPE PCB SERVICE Order Code Project Quantity Price ......................................................... ......................................................... ......................................................... APRIL 2023 Pico BackPack......................................................................... 07101221 Semaphore Signal (controller).................................................. 09103221 Semaphore Signal (blade)........................................................ 09103222 CODE £10.95 MAY 2023 MARCH 2023 PROJECT DECEMBER 2022 £9.95 £7.95 £5.95 ......................................................... ......................................................... ......................................................... ......................................................... Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......................................................... £9.95 £5.95 £8.95 £12.95 £7.95 £8.95 £9.95 £7.95 £5.95 £7.95 £7.95 Tel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Email . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Card No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valid From . . . . . . . . . . . . . . . . . Expiry Date . . . . . . . . . . . . . . . Card Security No . . . . . . . . . . You can also order PCBs by phone, email or via the shop on our website: www.electronpublishing.com No need to cut your issue – a copy of this form is just as good! All prices include VAT and UK p&p. Add £4 per project for post to Europe; £5 per project outside Europe. Orders and payment should be sent to: Practical Electronics, Electron Publishing Ltd 113 Lynwood Drive, Merley, Wimborne, Dorset BH21 1UU Tel 07918 614662 Email: pe<at>pemag.au Online Shop: www.electronpublishing.com Sorry, cheques cannot be accepted as we are based in Australia and our UK bank account does not allow cheque deposits. NOTE: Most boards are in stock and sent within seven days of order receipt. Please allow up to 28 days delivery if we need to restock. Practical Electronics | August | 2025 77 Practical Electronics PCB SERVICE PROJECT AUGUST 2022 CODE Multi-purpose Battery Manager – I/O Expander..................... 11104212 Multi-purpose Battery Manager – Switch Module.................. 11104211 Simple MIDI Music Keyboard (for 8 switches)........................ 23101213 Nano Pong................................................................................ 08105212 PRICE PROJECT AUGUST 2021 Silicon Labs AM/FM/SW Radio............................................... CSE210301C £10.95 Level Crossing Controller......................................................... 09108211 £6.95 Full-wave Motor Speed Controller........................................... 1010221 PIC Programming Helper for 8-pin PICs only......................... 24106211 PIC Programming Helper for 8, 14 or 20-pin PICs ................ 24106212 Advanced GPS Computer....................................................... 05102211 JULY 2021 ATtiny816 Breakout / Dev Board w/ Capacitive Touch...... 24110181 £9.75 IR Remote Control Assistant (Jaycar version).................... 15005201 £8.95 IR Remote Control Assistant (Altronics version)................. 15005202 £8.95 PIC18F Development Board............................................... PNM-JUL21 £12.95 Microphone Preamplifier........................................................AO-JUL21 £11.95 £8.95 £7.95 £10.95 £9.95 JUNE 2021 MAY 2022 Roadies’ Test Signal Generator (surface-mount ver.)......... 01005201 Roadies’ Test Signal Generator (through-hole version)...... 01005202 Touchscreen Wide-range RCL Box (Resistor module)....... 04104201 Touchscreen Wide-range RCL Box (Ind/Cap module)....... 04104202 KickStart Part 3 – Gyrator-based Audio Filter.................... KS3-2021 Bus board PCB for Analogue Vocoder............................... AO1-MAY22 £10.95 Complete set of 14 PCBs for Analogue Vocoder............... AO2-MAY22 £97.95 Programmed EEPROM for Digital FX Unit......................... FX1-MAY22 £10.95 Programmed PIC for Digital FX Unit w/ potentiometer.........FX2-MAY22 £8.95 APRIL 2022 MAY 2021 64-key MIDI Matrix shield........................................................ 23101211 £8.95 64-key MIDI Matrix switch board............................................ 23101212 £11.95 High-current Battery Balancer ................................................ 14102211 £10.95 Digital FX Unit – using potentiometer...................................... 01102211 £9.95 Digital FX Unit – using BCD switch.......................................... 01102212 £9.95 Universal Audio PSU................................................................ AO1-APR22 £11.95 MARCH 2022 Mini Isolated Serial Link........................................................... 24102211 Busy Loo Indicator................................................................... 16112201 Analogue Vocoder – Band-pass filter board........................... AO1-MAR22 Analogue Vocoder – HP/LP filter board.................................. AO2-MAR22 FEBRUARY 2022 Arduino-based Power Supply.................................................. 18106201 Battery Monitor Logger............................................................ 11106201 Electronic Wind Chimes........................................................... 23011201 Analogue Vocoder – Driver Amplifier....................................... AO-FEB22 JANUARY 2022 Vintage battery Radio Li-ion Power Supply............................ 11111201 MiniHeart: A Miniature Heartbeat Simulator........................... 01109201 7-Band Equaliser (Mono)......................................................... 01104201 7-Band Equaliser (Stereo)........................................................ 01104202 Car Altimeter............................................................................. 05105201 OCTOBER 2021 Mini Wi-Fi LCD BackPack.................................................. 24106201 £18.95 £7.95 £8.95 £10.95 £7.95 Reflow Oven – DSP Active Crossover (CPU)..................... 01106193 Reflow Oven – DSP Active Crossover (Front panel)........... 01106195 £19.95 Reflow Oven – DSP Active Crossover (LCD)...................... 01106196 Frequency Reference Signal Distributor.................................. CSE200103 £8.95 £5.95 £5.95 £9.95 £9.95 MARCH 2021 Nutube Guitar Effects Pedal............................................... 01102201 £12.95 Programmable Thermal Regulator (Peltier Interface)......... 21109181 £18.95 Programmable Thermal Regulator (Peltier Driver).............. 21109182 Tunable HF Preamp............................................................ CSE190502 £8.95 £9.95 £10.95 £10.95 £8.95 FEBRUARY 2021 4G Remote Monitoring....................................................... 27111191 JANUARY 2021 £9.95 £8.95 Nutube Valve Preamplifier.................................................. 01112191 Arduino DCC Controller...................................................... 09207181 £9.95 £12.95 £10.95 DECEMBER 2020 AM/FM/SW Digital Receiver............................................... CSE200902A £13.95 Balanced Input and Attenuator for USB CODEC............... 01106202 £11.95 Dual Battery Lifesaver........................................................ 11111202 £8.95 £9.95 APRIL 2021 DECEMBER 2021 NOVEMBER 2021 PRICE Ol’ Timer PCB..................................................................... 19104201 £11.95 Ol’ Timer 8x8 RGB LED module using WS2812B.............. 19104201-88 £8.95 Ol’ Timer set of acrylic case pieces and spacer................ 19104201-ACR £8.75 Ol’ Timer DS3231 RTC IC wide SOIC-16................................ 19104201-RTC £5.95 Wideband Digital RF Power Meter..................................... 04106201 £9.75 Switchmode 78xx regulators (PACK of 5!)........................ 18105201 £7.95 Cool Beans SMAD display................................................. CB-AUG21 £11.95 £5.95 £8.95 £6.95 £7.95 JULY 2022 JUNE 2022 CODE Pseudo-Random Sequence Generator.............................. 16106191 £7.95 Clever Charger................................................................... 14107191 £11.95 PE Theremin Amplifier........................................................ AO-1220-01 £8.95 £6.95 NOVEMBER 2020 LED Christmas Tree (1 off).................................................. 16107181-1 £6.95 LED Christmas Tree (4 off).................................................. 16107181-2 £14.95 LED Christmas Tree (12 off)................................................ 16107181-3 £24.95 LED Christmas Tree (20 off)................................................ 16107181-4 £34.95 USB/SPI Interface Board.................................................... 16107182 £5.95 45V/8A Power Supply PCB plus acrylic spacer................. 18111181 £14.95 45V/8A Power Supply five-way display bezel.................... 18111181-BZ £3.95 Five-way LCD Panel Meter/Display.................................... 18111182 £7.95 £8.95 SEPTEMBER 2021 USB SuperCodec PCB...................................................... 01106201 £14.95 Audio DDS Oscillator PCB................................................. 01110201 £5.95 Audio DDS Oscillator rotary encoder................................. 01110201-ENC 6.95 Programming Adaptor Board for Audio DDS Oscillator..... 01110202 £5.95 High-power Ultrasonic Cleaner main PCB......................... 04105201 £14.95 High-power Ultrasonic Cleaner front-panel PCB............... 04105202 Night Keeper Lighthouse PCB........................................... 08110201 £5.95 OCTOBER 2020 Digital Audio Millivoltmeter................................................. 04108191 Precision Signal Amplifier................................................... 04107191 £9.95 £7.95 Silicon Chip kits & parts for projects in this issue (posted from Australia): Micromite Explore-40 kit Micromite Explore-40 audio breakout PCB with connectors FlexiDice kit https://siliconchip.au/Shop/20/6991 https://siliconchip.au/Shop/8/7326 https://siliconchip.au/Shop/20/7361 AUD $42 (about £21) + P&P AUD $3 (about £1.50) + P&P AUD $36 (about £18) + P&P 20% VAT is included in the above prices (it will be removed for customers outside the UK). Postage & packing cost is typically around £12-15. Please allow 1-2 weeks for delivery (longer in some cases). 78 Practical Electronics | August | 2025