ATTiny85 Timer Switch PCB

@macroenergy

As an electronics engineer with extensive knowledge in PCB design and embedded system development, I am well-suited for your ATTiny85 Timer Switch PCB project. My experience in designing low-power, compact devices underscores my ability to meet your requirement of a board that runs on standard batteries while maintaining efficient power usage. Over the years, I have honed my skills in circuit design, particularly focusing on low-noise analog circuits and digital motor controls, which are directly applicable to your need for MOSFET-based electronic switches and GPIO interrupts. Proficient in Altium Designer, KiCad, and OrCAD, I can provide you with high-quality schematic and PCB files that reflect all your project specifications. My meticulous approach emphasizes the placement of decoupling components close to Vcc/GND paths and incorporating isolation slots where necessary, ensuring clean signal routing. Moreover, I understand the importance of adhering to low-µAbattery currents during sleep mode (sockets off), and will engage my expertise to accomplish this in your project without compromising performance.

@mairajali11

As an experienced and verified Electrical/Electronics Engineer, my expertise in PCB Designing aligns perfectly with your ATTiny85 Timer Switch PCB project. Having spent more than 8 years designing high-quality circuit boards using widely-known platforms, such as Eagle, Altium, KiCAD, and EasyEDA, I understand the importance of precision and low power consumption that your project demands. Due to my extensive knowledge and skills in embedded system design (Arduino, AutoCAD, Multisim, Proteus, LTspice, PSpice) and programming (C/C++), I am confident in implementing the key features you require: two ATtiny85 pins driving MOSFETs as switches, an extra GPIO for external sensor's interrupt pin along with ISP programming and a small pogo-pin test area. In adherence to your specifications, I will ensure that every component choice and trace width highlights low-power operation while keeping the battery holder footprint compact. My commitment to delivering exceptional results on time has placed me among the top 1% of Preferred Freelancers. With my dedication towards turning ideas into reality and ensuring customer satisfaction, I promise to provide not just the required deliverables but also an efficient project execution that meets your vision for affordability without compromising quality. Let's get started on this project; discussing it anytime you're available.

@tshibsamuel477

Hi there, I’ve carefully read your project description, and I can help design the compact single-sided ATTiny85 board with two MOSFET-switched outputs, interrupt input, ISP/USBASP programming footprint, pogo-pin test pads, battery holder routing, and low-power firmware. I’m Samuel Tshibangu, a mechatronics engineer with hands-on experience in ATTiny/AVR circuits, low-power battery devices, MOSFET load switching, KiCad/Altium PCB design, ISP programming, and embedded C firmware. I can keep the board under 30 × 30 mm, optimize for low sleep current, and provide clean production-ready files. I can deliver the schematic, PCB layout, Gerbers, drill files, assembly drawing, BOM, and demo HEX/source code showing timed switching plus interrupt wake from sleep. Feel free to send me the load current requirements and preferred battery holder, and I can start right away. Best regards, Samuel Tshibangu

@majeed219

Sub-15µA sleep on an ATtiny85 board is the whole game here — at that budget, a single wrong MOSFET (Rds(on) is irrelevant; gate leakage and the wrong pull configuration aren’t) or a leaky decoupling choice blows the spec. Single-sided under 30mm with an ISP footprint and pogo pads is tight but very doable. Why me? • Designed complex, miniaturized PCBs across AVR/ATtiny, ESP32, STM32, and Nordic nRF platforms — small single-layer boards included. • Hands-on with µA-level low-power design — proper MOSFET selection, pull-down placement, and leakage-aware part choices for sub-15µA sleep. • Comfortable with ATtiny85 firmware including pin-change interrupt wake-from-sleep and timed load toggling. • Route USBASP ISP plus pogo test pads so the board flashes cleanly with or without headers. • Deliver KiCad schematic/PCB, Gerbers, drill, assembly drawing, and BOM with real MPNs and costs. • response within 2 minutes during work hours. Happy to jump on a short call once those are clear.

@leonidye

Hi, I can design the compact single-sided ATTiny85 timer switch PCB with two MOSFET-controlled outputs, low-power battery operation, external interrupt input, ISP programming footprint, and pogo-pin flashing pads. The main focus will be confirming the two load specifications first, especially load voltage/current, so the MOSFETs, trace widths, connectors, and battery capacity are selected correctly. I will design for ultra-low sleep current under 15 µA by using ATTiny85 sleep modes, low-leakage MOSFETs, high-value pullups where suitable, and avoiding unnecessary current-draining parts. The board will be routed under 30 × 30 mm, with clear silkscreen labels, decoupling close to VCC/GND, battery holder footprint, sensor wake-up input, spare I/O breakout, and USBASP/pogo programming access. I can also provide a simple demo firmware HEX/source showing timed switching and wake-from-sleep interrupt operation. Deliverables will include the complete KiCad schematic/PCB files, Gerbers, drill files, assembly drawing, BOM, and demo source code. Regards.

@debosx

Hello! I'm a highly skilled PCB Designer with over 10 years of expertise in delivering reliable and efficient PCB designs. I specialize in creating precision designs tailored to client's needs, utilizing top-tier design tools such as Altium Designer, Autodesk Eagle, KiCad, EasyEDA, Siemens PADS, DipTrace, Allegro/OrCAD, Fritzing and Proteus. My goal is always to ensure the highest quality and performance in every project. Core Expertise : • Schematic Capture & Layout Design • Component Selection & Library Management • Reverse Engineering (PCB Replication, PCB Cloning) • Gerber, BOM, and CPL File Generation & Manufacturing Support • Design for Manufacturability (DFM) and Design for Assembly (DFA) • PCB Design & Development (Single, Double, Multi-Layer, Flexible PCBs) Industries Served : • Medical Devices • Telecommunications • Consumer Electronics • Industrial Equipment • Automotive Electronics • Safety and Security Devices Why Choose Me? • Attention to Detail and Commitment to Quality • Strong Communication Skills & Client-Centric Focus • Timely Delivery & Flexible Approach to Meet Project Requirements I would love to help you with your next PCB design project. Feel free to reach out, and let’s discuss how I can bring your ideas to life! Best Regards, Utpal

@hamzazayyad

Hello, I am an Electronics Engineer with 15+ years of experience in embedded systems, low-power electronics, PCB design, and custom microcontroller-based products. Your ATTiny85 low-power controller is a good fit for my background. I can design the complete schematic and compact PCB (under 30x30 mm), optimized for AA/AAA battery operation with ultra-low sleep current. I have extensive experience with AVR microcontrollers, MOSFET switching circuits, power optimization, ISP programming interfaces, and production-ready PCB layouts. For this project I will provide: • Complete schematic and PCB design in KiCad (or Altium if preferred) • Two MOSFET-controlled outputs driven by ATTiny85 • External interrupt input and spare GPIO breakout • USBASP 6-pin programming footprint and pogo-pin test pads • Proper decoupling, clear silkscreen labels, and manufacturing-friendly layout • DRC/ERC verified design • Gerbers, drill files, assembly drawing, and BOM with manufacturer part numbers • Demo firmware (HEX + source code) demonstrating timed switching, sleep mode operation, and interrupt wake-up functionality I regularly design embedded control boards, motor-control electronics, industrial automation hardware, and battery-powered devices, so I understand the importance of low-power design and reliable production files. I can also review component selection to help achieve the <15 µA sleep-current target before final release. Best regards, Hamza Electronics Engineer

@tetianam8

⭐⭐⭐⭐⭐ I've reviewed your requirements carefully, and this is exactly the kind of compact, low-power embedded design where attention to detail matters more than component count. The functionality itself is straightforward, but achieving reliable operation from AA/AAA cells while keeping sleep current below 15 µA requires careful selection of the ATTiny85 configuration, MOSFETs, pull networks, programming interface, and firmware sleep strategy. I can provide: • Complete schematic and PCB design (KiCad preferred, but Altium/Eagle also available) • Compact single-sided board under 30 × 30 mm • Two MOSFET-controlled outputs with low-leakage design • External interrupt input and spare GPIO breakout • USBASP 6-pin programming footprint and pogo-pin test pads • Production-ready Gerbers, drill files, assembly drawing, and BOM with MPNs • Demo firmware demonstrating timed switching, sleep mode, and interrupt wake-up • ERC/DRC verified design files Proposed Milestones: Schematic and component selection PCB layout and power optimization Firmware development and testing Manufacturing package generation Final review and delivery A few questions: Are the two outputs intended as low-side or high-side switches? What maximum load current should each MOSFET support? Do you have a preferred battery holder footprint (AA×2 or AAA×2)? I can deliver a clean, manufacturable design with power consumption and serviceability considered from the start.

@Alif2710

As an expert in electronic and circuit design with over 8 years of experience in military and avionic companies, I believe I'm the perfect fit for this project! My skills include proficiency in STM32, Arduino, PCB Design using EAGLE & KICAD, and a whole lot more that aligns closely to your needs. Having designed circuits even on the minutest scale as required for this project (with dimensions under 30×30mm), coupled with my deep Working knowledge on the ATtiny85 has equipped me with the skill to effectively toggle two independent loads under firmware-controlled timing while still ensuring low power operation and an accurate timer. Additionally, I have expertise in embedded systems design which will support you leveraging the full power of the ATTiny85 functionalities such as exposing one GPIO as an interrupt pin for an external sensor. My Switching Mode Power Supply (Buck, Boost, Buck-Boost) designing skills can effectively ensure battery current is kept below 15 µA on sleep with switches off. And rest assured that my designs have consistently passed DRC and ERC, so your Gerbers files will be nothing short of production-ready. So please let me handle this well within budget and meet your specifications down to the littlest detail. I guarantee prompt delivery without leaving out necessary details like BOM with manufacturer part numbers and cost estimation. Give this task to me, you won't have any regrets!

@shadabkhan92

Done , similar tasks https://www.freelancer.com/projects/embedded-systems/Sierra-Handshake-Integration lets discuss over chat

@shivkantverma

Hi, greetings..!! I am interested to work on your project. Please discuss PCB design details. Looking forward to work with you. Thank you

@soltracker

Hi sir....Its me Imad, have done 200+ projects regarding microcontrollers. Thanks for posting the job....................

@markupdudes

Hi, I have thoroughly reviewed your requirements for a compact ATTiny85 timer switch PCB with low-power optimization and precise features, and I'm confident I can deliver a design that meets all your criteria. With extensive experience in embedded systems and PCB design, I will create a single-sided board under 30x30 mm that controls two independent loads via MOSFETs, includes the interrupt GPIO for sensor input, and supports ISP programming with your requested footprint. I will ensure power efficiency, targeting battery current under 15 µA during sleep and follow best practices with decoupling, isolation slots, and clear silk-screen labels. I'll provide KiCad schematic and PCB files, production-ready Gerbers, a demo HEX illustrating the delayed toggling and interrupt wake from sleep, and a detailed BOM. I plan to deliver the complete package for your review within 7 days, and I welcome any feedback for quick adjustments before final sign-off. Do you have a preferred manufacturer or assembly service for the final production? Best regards,

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@ahmedy607

Hi, I have experience with low-power embedded systems, ATtiny microcontrollers, battery-powered devices, and compact PCB design. I can design the complete ATtiny85 board, including the dual MOSFET load switches, ISP programming interface, pogo-pin test pads, and low-power firmware with sleep/wake functionality. The design will be optimized for low current consumption, compact size, and manufacturability. Deliverables will include schematic, PCB layout, Gerbers, BOM, assembly files, and demonstration firmware. Best regards, Ahmed

@sakshis576

Hi, As an experienced and versatile freelancer, my proficiency in Arduino, Circuit Design, Electronics, Embedded Systems, and PCB layout makes me a natural fit for your ATTiny85 Timer Switch PCB project. I bring forth not only the technical know-how, but also an acute understanding of your specific requirements. Your demand for a single-sided board with ATtiny85 pins operating selectively and a low-power design aligns well with my skills. My previous work with ATTiny85 has allowed me to hone into designing PCBs that suit the requirements of small form factor projects such as yours. Given your emphasis on low-power operation and space optimisation, I assure you that my skill at selecting appropriate components and choosing trace widths to respect the 3V range without compromising efficiency will be invaluable. Additionally, in light of your requirement for the board to be ISP programmed through a USBASP 6-pin footprint sans headers once assembled, you can count on my meticulousness to deliver a design that caters to the same. My capability to provide complete KiCad files, production-ready Gerbers, drill files, and assembly drawings combined with a BOM with manufacturer part numbers and costs will ensure your workflow post-project is seamless. Best regards, Sakshi masih

@Santoshchaulaga

Hello, I am Santosh Chaulagain, a professional Electrical Engineer and PCB Designer with over 7 years of experience in schematic design, PCB layout, and embedded systems, including ESP32, IoT devices, analog and digital circuits. I have successfully completed multiple projects for clients worldwide, delivering reliable and manufacturable designs. I have carefully reviewed your project requirements and I am confident that I can provide a high-quality solution tailored to your needs. My expertise includes PCB design using industry standards, component selection, BOM preparation, Gerber generation, and design optimization for cost and performance. I always ensure that my designs are fabrication-ready and tested for reliability. I focus on clear communication, timely delivery, and customer satisfaction. I am happy to discuss your project in detail and provide revisions until the final result meets your expectations. Looking forward to working with you. Best regards, Santosh C. Electrical Engineer | PCB Designer | ESP32 & IoT Specialist

@robertobizzarri

I've used the AVR family of Atmel processors numerous times, including the ATtyny85. I've been working with firmware and PCBs for 30 years now. If I understand correctly, you're asking for a complete project, schematic, PCB, and basic firmware, right?

@akshayrukade01

Hi, I am an Electronic Systems designer based at the IIT Madras incubation hub, and I can design and route this ATtiny85 load-switch board for you in KiCad immediately. To hit your sub-15 µA sleep current target, I will configure the ATtiny85's Power-down mode with the ADC, BOD, and watchdog timer disabled, utilizing a pin-change interrupt (PCINT) on your spare GPIO to wake the system. For the switches, I will spec low-leakage N-channel or P-channel MOSFETs (depending on if you need high-side or low-side switching), ensuring the gate pull-down resistors are sized to prevent parasitic drain while sleeping. Regarding your 30 × 30 mm dimension constraint: standard 2×AA or 2×AAA through-hole holders will physically overhang a 30mm board. If the board must strictly be 30x30mm including the power source, we will need to use a coin cell (like CR2032), or route pads for external battery wires rather than an onboard holder. Deliverables will include the full KiCad project, standard Gerbers/Drills/BOM, and the demo C/C++ firmware proving the deep sleep and interrupt wake sequence. Let me know if you want to proceed with wire pads or a coin cell, and I can start the schematic today. Best, Akshay Rukade