toothache

IC card, meal card, mobile phone NFC access control

Overview

1. It is a simple single-chip servo control. There will be differences in different servo models (mine is sg90 ).

2. The stc8 used is small in size and rich in functions.

3. I initially bought a 0.96-inch OLED, but gave up because of the power consumption.

4. The hardware sleep circuit can set the working time according to the capacitance value (I did it for about 10S).

5. There is a DC 5.5 interface, powered by a 7.4V rechargeable battery. Short-circuit the input and output of the 7805 to use the power bank to supply power (solve the problem of the power bank sleeping).

6. Enter the IC card with one click and open the door indoors with one click.

7. The corresponding module of the NFC module interface is RC-522

8. Subsequent improvements

If you have any questions, please leave a message. If you don’t like it, don’t comment. Please give me some advice.

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-08-07 10:05:47

How to put the module program
I want to use a single-chip microcomputer to control a switching power supply (PWM generation, PI regulator, AD sampling, current and voltage display, etc.). How should I arrange these module programs
Texas Instruments helps power Bitcoin mining machines
[size=4][b]Texas Instruments helps Bitcoin mining machine power supply[/b][/size][size=4][color=rgb(85, 85, 85)][align=left]With the rise of virtual currency, the computer host equipment "mining machi
Problems with MT6 series touch screen products
A few days ago, I used the MT6100I series of Vinylon touch screen products. About 7 days later, I found a fault: the basic symptoms are as follows: the black screen and the Vinylon hand-shaped logo fl
Migrate from M2M to IIoT
As the need for industrial automation increased, industrial protocols and M2M machine communications gradually migrated to the IIoT Industrial Internet of Things. Many of today's connected devices wou
How to configure STM32F407 Ethernet?
As the title says, the example program of the official evaluation board has RLos. I use the UDPTCPdbg tool to debug and transfer files in the LAN. The tool shows that the rate is only tens of K. I wan
What is your answer to the Huawei interview question that is trending on the Internet?
In the past few days, this interview question from Huawei has become a hot topic. If you are interested, you can take a look.The test question is: A cow weighs 800 kg, but the bridge in front of it ca

Datasheet More

Circuits More