Description
One card. One unique ID. Zero fuss.
The EM4100 125 kHz smart RFID card carries its own permanent ID number, engraved on the card and stored in the chip. Hold it near a 125 kHz reader and your system knows exactly who it is. It is the simplest, cheapest way to build attendance, door access and ID systems.
EM4100 ১২৫ kHz স্মার্ট RFID কার্ড। প্রতিটি কার্ডে আলাদা ইউনিক আইডি নম্বর ছাপা থাকে এবং চিপের ভেতরেও থাকে। হাজিরা সিস্টেম, দরজার অ্যাক্সেস কন্ট্রোল, স্কুল-অফিস আইডি এবং Arduino প্রজেক্টে ব্যবহার করুন। RDM6300 ও EM-18 রিডারের সাথে কাজ করে।
Which RFID card do you need?
We stock three kinds of RFID and NFC cards and tags. Choose what you want to do to see the best match.
Not sure? Message us with your project and we will suggest the right card and reader.
Specifications
| Type | EM4100 (TK4100 compatible) 125 kHz RFID proximity card |
|---|---|
| Frequency | 125 kHz (low frequency) |
| ID | Factory-programmed unique ID that cannot be changed. The number is also engraved on the card. |
| Memory | Read-only. The card holds its ID and nothing else. |
| Size | Standard card format, about 85 × 54 mm |
| Works with | 125 kHz readers such as RDM6300 and EM-18, and most 125 kHz door access readers |
| Does not work with | RC522 (13.56 MHz) readers, and phones |
| Read range | A few centimetres, depending on the reader |
| Bulk pricing | 5% off for 50 to 99 pieces, 10% off for 100 pieces or more |
| In the box | RFID cards in the quantity you order |
EM4100 125 kHz or 13.56 MHz 1K card?
| EM4100 125 kHz (this card) | 13.56 MHz 1K card | |
|---|---|---|
| Memory | ID only | 1 KB of rewritable memory |
| Rewritable | No | Yes |
| Reader | RDM6300, EM-18, 125 kHz readers | RC522, PN532 |
| Phone | No | Many Android phones |
| Best for | Simple ID, attendance, door access | Balances, user data, programmable cards |
What you can build
If you only need to know who it is, this card does the job.
Attendance system
Record who arrived and when, for a class, office or workshop, using an Arduino and a reader.
Door access control
Open a door or a drawer lock for approved cards only.
School and office ID
Give every person a card with a number that cannot be copied by hand.
Gym and club membership
Check members in at the door.
Parking and gate
Open a gate for registered vehicles’ cards.
Arduino learning
A cheap way to learn RFID with the RDM6300 reader.
Connect an RDM6300 reader to Arduino
| RDM6300 pin | Arduino UNO |
|---|---|
| 5V | 5V |
| GND | GND |
| TX | D2 (read by SoftwareSerial) |
Check your reader: the RDM6300 needs an antenna coil attached and a 5V supply. The RC522 reader sold for 13.56 MHz cards cannot read this card, so make sure you use a 125 kHz reader.
Basic Arduino code: read the card ID
#include <SoftwareSerial.h>
SoftwareSerial rdm(2, 3); // RX = 2, TX = 3
void setup() {
Serial.begin(9600);
rdm.begin(9600);
Serial.println("Tap a card");
}
void loop() {
if (rdm.available() && rdm.read() == 0x02) { // start of message
String id = "";
for (int i = 0; i < 10; i++) {
while (!rdm.available());
id += (char)rdm.read(); // 10 hex characters
}
Serial.print("Card ID: ");
Serial.println(id);
delay(1000);
while (rdm.available()) rdm.read(); // clear the rest
}
}Basic Arduino code: open a lock for one card
Read your card ID with the sketch above, then paste it below. The relay on pin 8 switches on for two seconds when the allowed card is tapped.
#include <SoftwareSerial.h>
SoftwareSerial rdm(2, 3);
const String allowedID = "1A00XXXXXX"; // replace with your card ID
void setup() {
pinMode(8, OUTPUT);
digitalWrite(8, LOW);
rdm.begin(9600);
}
void loop() {
if (rdm.available() && rdm.read() == 0x02) {
String id = "";
for (int i = 0; i < 10; i++) {
while (!rdm.available());
id += (char)rdm.read();
}
if (id == allowedID) {
digitalWrite(8, HIGH); // access granted
delay(2000);
digitalWrite(8, LOW);
}
delay(500);
while (rdm.available()) rdm.read();
}
}Questions buyers ask
What reader do I need for this card?
A 125 kHz reader, such as the RDM6300 or EM-18 module for Arduino, or a 125 kHz door access reader. The RC522 reader cannot read it.
Can I read it with my phone?
No. Phones read 13.56 MHz cards and tags. If you want to use a phone, choose our NTAG213 NFC tags instead.
Can I write data on the card?
No. The EM4100 card is read-only and only holds its ID. For rewritable memory, choose our 13.56 MHz 1K card.
What is the number printed on the card?
It is the card’s ID, engraved on the card so you can record it. Readers show the same ID in a different format, usually as hexadecimal numbers.
How far can the card be read from?
A few centimetres. The exact range depends on your reader and its antenna.
Do you offer bulk discounts?
Yes. You get 5% off when you order 50 to 99 cards, and 10% off for 100 cards or more.
Do you deliver outside Dhaka?
Yes, we deliver all over Bangladesh.
Related searches
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Banglish: EM4100 card dam koto, 125kHz RFID card kothay pabo, RFID attendance card price BD, access card kinbo kothay, Arduino shop Dhaka
বাংলা: আরএফআইডি কার্ড দাম, ১২৫ কিলোহার্টজ কার্ড, EM4100 কার্ড, অ্যাক্সেস কন্ট্রোল কার্ড, হাজিরা কার্ড, রোবোটিক্স শপ ঢাকা
