Micro SD Memory Card interface for 3V MCU

3V SPI Interface to micro SD memory cards in 2.54mm pinout

Sunrom Part# 1102

Available We dispatch same day if ordered by 4PM (excluding holidays), then courier usually takes 2-5 days.
Quantity Pricing
Quantity :
Price (Discount%)
1-4 :
Rs.100/- (0%)
5-9 :
Rs.97/- (3%)
10-24 :
Rs.93/- (7%)
25-49 :
Rs.90/- (10%)
50-74 :
Rs.88/- (12%)
75-99 :
Rs.85/- (15%)
100-249 :
Rs.82/- (18%)
250-499 :
Rs.80/- (20%)
500-999 :
Rs.78/- (22%)
1000+ :
Rs.75/- (25%)

Thanks to mobile revolution, today Micro SD memory cards are available at very low cost(for example a Micro SD 2 GB card at around 200/- INR or $4 USD) so they make ideal choice in embedded projects for data storage and retrieval. More over cards upto 32 GB are also available easily. Many projects like data logger, audio playback etc can be developed.

We have provided an interface boards which accepts any Micro SD Memory Card and provides a 0.1” in standard header for easy connection to any microcontroller system. All SD Card works on 3V interface so if your microcontroller is working on 3V you can use this board readily.  

The interface board provided is for microcontrollers running at 3V.

R1, R2 & R3 are pull up 10K resistors as required by SD Card to operate correctly. The CD is card detect signal which tells if a card is inserted or not.

You can see our board circuit diagram below, we have already put the 10K pull up resistor on data pins and 100nf supply capacitor.

Suitable for Micro SD Cards (Same used in mobile phones)

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Sunrom Electronics & Sunrom Technologies are two companies, that are the foremost online e-commerce stores since 2004, providing innovative embedded systems, components & services. Our aim is to empower you to Make In India. We work closely with electronics manufacturing companies & individuals to understand & solve the challenges faced during production. We do not just sell things, We use them ourselves in our products, and provide you with high quality tested components for trouble free experience.

  • Sunrom Electronics
  • GSTIN: 24AFBPT4632H1ZJ
  • Sunrom Technologies
  • GSTIN: 24AJLPP4029L1ZW
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