Arduino Mega Bacterial Chemotaxis Gradient Assay Kit – Map Attractant Gradients with a 4-Probe TDS EC Array

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Decode how bacteria navigate chemical landscapes by building your own TDS/EC gradient assay station. This kit equips you with an Arduino Mega‑driven, four‑probe array that maps attractant concentration across an agar plate in real time — converting subtle changes in electrical conductivity into a spatial map of chemotactic gradients. Whether you are replicating a classic capillary assay or investigating a new chemoattractant, you get a fully integrated, pre‑tested data‑logging system ready for the bench.

What You’ll Build

You will assemble a 4‑channel TDS/EC meter that positions probes at user‑defined intervals along an agar plate. The Arduino Mega reads each probe, timestamps the value with a DS3231 RTC, and streams live readings to the 1.8‑inch ST7735 TFT display. All data is simultaneously logged to a MicroSD card for later analysis, letting you plot concentration vs. position and time to quantify bacterial migration toward a nutrient source.

What You’ll Learn

• Interface four TDS/EC analog probes with Arduino Mega and calibrate them against standard solutions
• Implement a DS3231 real‑time clock and MicroSD logging to timestamp every measurement
• Design a multi‑channel data‑acquisition routine that cycles through channels and updates a TFT display
• Interpret conductivity maps to infer attractant concentration gradients and correlate with bacterial distribution

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

B.Tech Biotechnology and Instrumentation Engineering students designing microbial chemotaxis experiments will find a ready‑to‑assemble toolkit that saves weeks of piecemeal sourcing. Smart India Hackathon teams tackling the Biotech or Agriculture track can use the gradient mapper for rapid prototyping. ATL Tinkering Labs seeking advanced interdisciplinary projects and researchers at IIT, NIT, VIT, or BITS needing a custom data‑logging assay station will also benefit from the integrated design.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.

Choose your assembly option:

• Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.