Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Thermoelectric Cooler Peltier 40mm 12v from Circuitrocks is ideal for DIY electronics builds.
Great for Arduino, ESP32, Raspberry Pi, and robotics or school projects here in the Philippines.
TEC1 Series Thermoelectric Cooler Peltier Modules – 40mm, 12V
The TEC1 series thermoelectric cooler modules are solid-state devices that transfer heat from one side to the other, creating a temperature difference when powered. Perfect for cooling, heating, or even power generation applications, they are commonly used in CPU coolers, mini fridges, and thermal experiments.
When powered with the correct polarity (red = positive, black = negative), the side with printed text becomes the cold side, while the opposite side becomes the hot side. As long as a temperature difference exists, these modules can also generate electricity.
Quick Specs:
Models Available: TEC1-12703, 12704, 12705, 12706, 12708, 12709, 12710, 12712, 12715
Size: 40 × 40 × 4mm
Cold Side: Side with printed text
Hot Side: Side without text
Polarity: Red = +, Black = –
Note: Must be used with a suitable heat sink to prevent damage
Applications:
Electronics cooling systems
Portable refrigerators and beverage coolers
Thermal cycling experiments
Low-power electricity generation from heat differenc
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →