Standalone DRAM Tester for 4164 / 41256 Memory Chips – PLUG & PLAY, Arduino Nano Included!

Essential diagnostic tool for vintage computer and console repair.

Faulty DRAM is one of the most common failures in vintage 8-bit and 16-bit systems. This DRAM Tester is designed to quickly verify the health of individual memory chips, supporting both 4164 (64kbit) and 41256 (256kbit) chips (plus compatible variants).

"We use this exact DRAM test Shield on own workstation to test New Old Stock (NOS) and salvaged RAM—it's an absolute lifesaver. We've acquired a small batch to help fellow retro enthusiasts keep classic hardware alive at an affordable price."

What’s Included

Fully Assembled Test Shield: Professionally soldered and ready for immediate bench use.
Pre-Programmed Arduino Nano: Included and flashed with the testing firmware. A complete, ready-to-go solution out of the box.

Key Features

Universal Compatibility: Tests standard 4164 and 41256 DRAM chips.
Standalone Operation: No PC or Serial Monitor required for basic testing. Onboard LEDs provide instant visual feedback.
Modern USB-C Power: Easily power the unit using any standard USB-C cable connected to a PC, power bank, or 5V phone charger—* Charge Cable not supplied.
Quality Build: High-quality FR-4 PCB featuring clean solder joints and precision socket headers.

How to Use

Power Up: Insert Chip: Connect a standard 5V USB-C power source.
Carefully insert your DRAM chip into the socket, ensuring correct orientation (Pin 1 / notch facing toward the LEDs).
Read Results: The tester stress-tests the memory cells and indicates status instantly:
- 🟢 GREEN LED: Chip passed all tests; ready for use.
- 🔴 RED LED: Fault detected; chip is defective.

⚠️ Safety Warning

Orientation: Inserting a chip backward can cause it to overheat and fail instantly. Double-check alignment before powering on.
ESD Sensitive: Always handle RAM chips and circuit boards using proper anti-static precautions.

Quality Guarantee & Shipping