AVR ISP Bootloader Programmer Shield with 28-Pin ZIF Socket for Arduino UNO

AVR ISP Bootloader Programmer Shield with 28-Pin ZIF Socket for Arduino UNO is a dedicated production-grade In-System Programming (ISP) expansion shield that transforms any standard Arduino UNO R3 into a standalone AVR chip burner. Furthermore, it features a 28-pin Zero Insertion Force (ZIF) locking socket for bare DIP-28 ATmega328P-PU / ATmega168 / ATmega8 microcontrollers, a 16 MHz onboard target crystal, a 6-pin ICSP output header, a piezo completion buzzer, and diagnostic `Heartbeat / Error / Programming` LEDs. Consequently, you can burn Arduino Optiboot bootloaders or upload sketches into blank AVR chips in seconds without a messy breadboard crystal/capacitor setup.

Key Features:

• 28-Pin Zero Insertion Force (ZIF) Socket: Quick-release lever socket clamps bare 28-pin 300-mil DIP AVR microcontrollers (`ATmega328P-PU, ATmega168P, ATmega8A`) with zero pin bending.
• Onboard 16 MHz Target Clock Oscillator: Supplies the mandatory external clock signal required to program AVR chips whose fuses are already set for an external 16 MHz crystal.
• Audible Piezo Buzzer & 3 Status LEDs: Emits a clear confirmation beep on successful bootloader/sketch flashing and drives `PROG`, `ERR`, and `HEARTBEAT` indicator LEDs.
• External 6-Pin ICSP Output Header: Standard 2×3 male ICSP header lets you use a 6-pin ribbon cable to burn bootloaders onto external target Arduino boards (Nano, Pro Mini, Mega).
• Auto-Reset Override Circuit: Disables the host Arduino UNO’s auto-reset line cleanly during `Arduino as ISP` operation.

Technical Specifications:

• Compatible Host Board: Arduino UNO R3 (Loaded with the standard `ArduinoISP` or `OptiLoader` Sketch)
• Supported ZIF Socket Devices: 28-Pin DIP ATmega328P-PU, ATmega328-PU, ATmega168PA-PU, ATmega88, ATmega48, ATmega8A-PU
• Supported ICSP Header Targets: Any 5V AVR Board with a 6-Pin ICSP Port (UNO, Nano, Pro Mini 5V, Mega 2560, Leonardo)
• Target Oscillator: Onboard 16.000 MHz Quartz Crystal + Load Capacitors
• Programming Protocol: SPI In-System Programming (`D10 RESET, D11 MOSI, D12 MISO, D13 SCK`)
• Operating Voltage: 5.0V DC (Supplied from Host Arduino UNO)

Mechanical Specifications:

• PCB Form Factor: Standard Arduino UNO R3 Stackable Shield Footprint
• Socket Type: 28-Pin 300-mil Narrow/Universal Locking ZIF Socket
• User Feedback: Onboard Piezo Buzzer + 3 × SMD Status LEDs

Dimensions:

• Length: 68.6 mm
• Width: 53.4 mm
• Height: 22.0 mm (Including ZIF Socket Lever)
• Weight: ≈ 30 g

Pinout and Wiring:

• Step 1: Upload the `File -> Examples -> 11.ArduinoISP -> ArduinoISP` sketch to your host Arduino UNO R3 FIRST before plugging the shield on top.
• Step 2 (ZIF Chip Placement): Lift the ZIF lever, place your blank 28-pin ATmega328P-PU chip into the socket with its Pin-1 half-moon notch pointing toward the ZIF locking lever (matching the PCB silkscreen outline), and push the lever down to lock.
• Step 3 (Burn Bootloader): In the Arduino IDE, select `Tools -> Programmer -> Arduino as ISP`, select your target board (`Arduino UNO`), and click `Tools -> Burn Bootloader`.
• Engineering Precaution: Never insert or remove an ATmega328P-PU chip from the 28-pin ZIF socket while the shield is actively programming, and always double-check that the IC Pin-1 notch faces the lever end to prevent reverse-polarity chip destruction.

Datasheet Reference:

• View Official Microchip AVR910 In-System Programming Application Note PDF

Commonly Used in:

• Batch Bootloader Flashing for Blank ATmega328P-PU DIP Chips
• College Electronics Lab Maintenance & Bricked Arduino Bootloader Recovery
• Bootloader-Free Direct Sketch Flashing (`Upload Using Programmer`) to Save 0.5KB/2KB Flash

Applications:

• Rapid Production Chip Burning: Pairs with WestfW’s `OptiLoader` standalone sketch on the host UNO to flash Optiboot onto dozens of blank ATmega328P chips per minute without even needing a PC connected.
• Standalone Breadboard MCU Prep: Burns the 16 MHz or 8 MHz internal-clock bootloader onto bare AVR chips before embedding them into custom PCBs.
• 6-Pin ICSP Target Recovery: Revives bricked Arduino Nano or UNO boards whose serial bootloaders were corrupted.

Equivalent Models:

• SP200SE Atmel 8051 & AVR USB Programmer: Standalone 40-pin ZIF USB programmer supporting 8051, AVR, and 24C/93C EEPROM chips via PC software.
• ATtiny13A/25/45/85 Development Programmer Board: Dedicated 8-pin DIP socket board for programming miniature 8-pin ATtiny MCUs.
• USBasp 10-Pin AVR ISP Dongle: Cable-only USB ISP programmer without a 28-pin ZIF socket or onboard 16 MHz target crystal.

Package Includes:

• 1 × AVR ISP Bootloader Programmer Shield with 28-Pin ZIF Socket for Arduino UNO