3.3V / 5V Sensors LM339 4 Channel / 4 way test Photosensitive For Arduino

3.3V / 5V Sensors   LM339 4 Channel / 4 way test Photosensitive For Arduino

Specification:

Module Interface Description :

1.DO1-- 1 TTL level output
2.DO2-- 2 -way TTL-level output
3.DO3-- 3 -way TTL-level output
4.DO4-- 4 -way TTL-level output
5.GND-- connected to the supply negative
6.VCC-- positive power supply

Competitive Advantage:

1. Convenient & Friendly Customer Service
2. Low Prices Direct From Factory Suppliers
3. Fast Delivery Around the World. 
4. High Quality With Global Standards. 
5. 1 Year Factory Warranty
6. Safe Shipping Way and Payment

Factory Picture:

Awards:

FAQ:

1. What is the delivery time?

  Normally, 1-5 workdays after payment;

  Special requirement orders, delivery time is negotiable.

2.If the products can’t work after receiving it,what should I do?

  We will replace new items for you at once, and respect your final decision for wrong goods.

3.If the products don’t meet my demand after I received it,can I return it?

  Yes,no problem.

  You can return back to us, we will refund your full payment.