Cookies help us provide services. By using our services you consent to the use of cookies. OK More info
WIZNET

IoT Watch with Wiznet W7500

This article explains how to make a simple network watch with 7 segment LED display. The watch gets time information from network using SNTP (Simple Network Time Protocol) and displays the current time on the 7 segment display using RTC (Real Time Clock).

The good old 7-segment display was widely used at the end of last century. I’m sure you still have some in your desk drawer. It is a “low cost” alternative to matrix LED display. SNTP (Simple Network Time protocol) is the network protocol for time synchronization on the Internet. RTC provides the current time information. It counts the date, time, minute and second by operating independently from the MCU or CPU.

Hardware
WIZwiki-W7500: 1ks (Cortex-M0 Platform board)
LED display Common-Anode Typ, 7-Segment : 2EA
BC547 : 8EA
Tact Switch : 1EA
220Ohm Resistor : 16EA
1kOhm Resistor : 8EA
10kOhm Resistor : 1EA
1uF : 1EA
Jumper Wires
Bread Board

As shown on the circuit image, the A~G pins from 7 segment display are parallely connected to WIZwiki-W7500. Common pins can be optionally connected 3.3V using npn transistor.
https://blog.wiznettechnology.com/category/w7500/

The test
If you watch the demonstration movie, when the WIZwiki-W7500 is reset, it acquires the time information from NTP server. If the RED LED is on, it means the time information is successfully acquired from NTP server. The time information is registered to RTC. The current time of RTC is displayed on the 7 segment LED display. Whenever you press the switch, the time and data information is alternately displayed on the display.

Firmware Code
The firmware is programmed on the mbed on-line compiler. If you click on below link, you can get the source code.
https://developer.mbed.org/users/nanjsk/code/SNTP_7SEG_WIZwiki_W7500/

Videos

Example of application.


Main products

image type / kind / description Ord.number manufacturer in stock External stock price/pc excl. VAT
WIZwiki-W7500 WIZNET WIZwiki-W7500

Platform for W7500 MCU Arduino compatible

More info: wizwiki_w7500_sch_v1...

Ethernet

196279
S

WIZNET

in stock 4 pcs
-

1 pcs+ 36,6000 €

2 pcs+ 35,3000 €

3 pcs+ 32,9000 €

5 pcs+ 32,1000 €


WIZwiki-W7500 WIZNET  
WIZwiki-W7500

Platform for W7500 MCU Arduino compatible

Ethernet

Ord. No.: 196279
Manufacturer: WIZNET
in stock 4 pcs
1 pcs+
2 pcs+
3 pcs+
5 pcs+
36,6000 €
35,3000 €
32,9000 €
32,1000 €

Additional products

image type / kind / description Ord.number manufacturer in stock External stock price/pc excl. VAT
CA 56-12 SRWA KINGBRIGHT CA 56-12 SRWA

LED display 7-segment 4-digits 14.2mm red

More info: c56.pdf

LED - displays 7- segment

43953
S

KINGBRIGHT

in stock 120 pcs
-

1 pcs+ 2,7500 €

10 pcs+ 2,4000 €

30 pcs+ 2,2700 €

110 pcs+ 2,0200 €

BC 547 B BULK DIOTEC BC 547 B BULK

Transistor NPN 0,1A/45V 0,5W TO92 Bulk P1,27

More info: bc546bk.pdf

Bipolar transistors low-power

75754
S

DIOTEC

in stock 6600 pcs
-

100 pcs+ 0,0149 €

200 pcs+ 0,0128 €

500 pcs+ 0,0122 €

1000 pcs+ 0,0115 €

B3F-1052 OMRON B3F-1052

Tactile Switch 6x6mm Projected

More info: b3f.pdf

Push-buttons into PCB micro

42620
S

OMRON

in stock 1500 pcs
-

10 pcs+ 0,1990 €

20 pcs+ 0,1550 €

100 pcs+ 0,1400 €

500 pcs+ 0,1290 €

2000 pcs+ 0,1150 €

RM 1% 220 R (MF0207FTE52-220R) YAGEO RM 1% 220 R (MF0207FTE52-220R)

Metal Film Resistor 0207 0,6W

More info: MF0.pdf

Leaded Resistors

30789
S

YAGEO

in stock 29950 pcs
Currently in stock 33000 pcs
Reserved for customers 3050 pcs
Currently available 29950 pcs
If you are interested in bigger quantity that is currently available in stock, please contact our sales assistant or click on Get Quote.
-

50 pcs+ 0,0235 €

200 pcs+ 0,0106 €

1000 pcs+ 0,0068 €

5000 pcs+ 0,0052 €

15000 pcs+ 0,0049 €

RM 1% 1 K (MF0207FTE52-1K) YAGEO RM 1% 1 K (MF0207FTE52-1K)

Metal Film Resistor 0207 0,6W

More info: MF0.pdf

Leaded Resistors

30867
S

YAGEO

in stock 42140 pcs
Currently in stock 43000 pcs
Reserved for customers 860 pcs
Currently available 42140 pcs
If you are interested in bigger quantity that is currently available in stock, please contact our sales assistant or click on Get Quote.
-

50 pcs+ 0,0235 €

200 pcs+ 0,0106 €

1000 pcs+ 0,0068 €

5000 pcs+ 0,0052 €

15000 pcs+ 0,0049 €

RM 1% 10 K (MF0207FTE52-10K) YAGEO RM 1% 10 K (MF0207FTE52-10K)

Metal Film Resistor 0207 0,6W

More info: MF0.pdf

Leaded Resistors

30981
S

YAGEO

in stock 26280 pcs
Currently in stock 27000 pcs
Reserved for customers 720 pcs
Currently available 26280 pcs
If you are interested in bigger quantity that is currently available in stock, please contact our sales assistant or click on Get Quote.
-

50 pcs+ 0,0235 €

200 pcs+ 0,0106 €

1000 pcs+ 0,0069 €

5000 pcs+ 0,0052 €

15000 pcs+ 0,0049 €

ELMIN 1uF/63V SMSE (SSR010M1JC07M) JAMICON ELMIN 1uF/63V SMSE (SSR010M1JC07M)

Miniature Radial Electrolytic Capacitor 4x7x1,5mm

More info: ss-jamicon.pdf

Electrolytic Capacitors

19470
S

JAMICON

in stock 1500 pcs
-

100 pcs+ 0,0194 €

200 pcs+ 0,0188 €

1000 pcs+ 0,0170 €

4000 pcs+ 0,0158 €

16000 pcs+ 0,0140 €

SJ-65 SJ-65

Flexible terminal contact set 65pcs

Cables various

121582
S

-

in stock 71 pcs
(We are checking the delivery date: 150 pcs)
-

1 pcs+ 5,6600 €

2 pcs+ 5,3600 €

5 pcs+ 4,9500 €

10 pcs+ 4,6500 €

BB-01 ( 640/200 ) BB-01 ( 640/200 )

Bread Board 840pins 66x174x8,5mm

Breadboards

45832
S

-

in stock 77 pcs
(We are checking the delivery date: 100 pcs)
-

1 pcs+ 6,7200 €

10 pcs+ 5,5000 €

25 pcs+ 5,0200 €

50 pcs+ 4,3800 €


CA 56-12 SRWA KINGBRIGHT  
CA 56-12 SRWA

LED display 7-segment 4-digits 14.2mm red

LED - displays 7- segment

Ord. No.: 43953
Manufacturer: KINGBRIGHT
in stock 120 pcs
1 pcs+
10 pcs+
30 pcs+
110 pcs+
2,7500 €
2,4000 €
2,2700 €
2,0200 €

BC 547 B BULK DIOTEC  
BC 547 B BULK

Transistor NPN 0,1A/45V 0,5W TO92 Bulk P1,27

Bipolar transistors low-power

Ord. No.: 75754
Manufacturer: DIOTEC
in stock 6600 pcs
100 pcs+
200 pcs+
500 pcs+
1000 pcs+
0,0149 €
0,0128 €
0,0122 €
0,0115 €

B3F-1052 OMRON  
B3F-1052

Tactile Switch 6x6mm Projected

Push-buttons into PCB micro

Ord. No.: 42620
Manufacturer: OMRON
in stock 1500 pcs
10 pcs+
20 pcs+
100 pcs+
500 pcs+
2000 pcs+
0,1990 €
0,1550 €
0,1400 €
0,1290 €
0,1150 €

RM 1% 220 R (MF0207FTE52-220R) YAGEO  
RM 1% 220 R (MF0207FTE52-220R)

Metal Film Resistor 0207 0,6W

Leaded Resistors

Ord. No.: 30789
Manufacturer: YAGEO
in stock 29950 pcs
50 pcs+
200 pcs+
1000 pcs+
5000 pcs+
15000 pcs+
0,0235 €
0,0106 €
0,0068 €
0,0052 €
0,0049 €

RM 1% 1 K (MF0207FTE52-1K) YAGEO  
RM 1% 1 K (MF0207FTE52-1K)

Metal Film Resistor 0207 0,6W

Leaded Resistors

Ord. No.: 30867
Manufacturer: YAGEO
in stock 42140 pcs
50 pcs+
200 pcs+
1000 pcs+
5000 pcs+
15000 pcs+
0,0235 €
0,0106 €
0,0068 €
0,0052 €
0,0049 €

RM 1% 10 K (MF0207FTE52-10K) YAGEO  
RM 1% 10 K (MF0207FTE52-10K)

Metal Film Resistor 0207 0,6W

Leaded Resistors

Ord. No.: 30981
Manufacturer: YAGEO
in stock 26280 pcs
50 pcs+
200 pcs+
1000 pcs+
5000 pcs+
15000 pcs+
0,0235 €
0,0106 €
0,0069 €
0,0052 €
0,0049 €

ELMIN 1uF/63V SMSE (SSR010M1JC07M) JAMICON  
ELMIN 1uF/63V SMSE (SSR010M1JC07M)

Miniature Radial Electrolytic Capacitor 4x7x1,5mm

Electrolytic Capacitors

Ord. No.: 19470
Manufacturer: JAMICON
in stock 1500 pcs
100 pcs+
200 pcs+
1000 pcs+
4000 pcs+
16000 pcs+
0,0194 €
0,0188 €
0,0170 €
0,0158 €
0,0140 €

SJ-65  
SJ-65

Flexible terminal contact set 65pcs

Cables various

Ord. No.: 121582
in stock 71 pcs
(We are checking the delivery date: 150 pcs)
1 pcs+
2 pcs+
5 pcs+
10 pcs+
5,6600 €
5,3600 €
4,9500 €
4,6500 €

BB-01 ( 640/200 )  
BB-01 ( 640/200 )

Bread Board 840pins 66x174x8,5mm

Breadboards

Ord. No.: 45832
in stock 77 pcs
(We are checking the delivery date: 100 pcs)
1 pcs+
10 pcs+
25 pcs+
50 pcs+
6,7200 €
5,5000 €
5,0200 €
4,3800 €
Report a bug

Would you like to change anything? Did you come across any error? Or do you have any interesting comments? Share it with us. Valuable comments will be rewarded. You only need to describe the error or your comment and provide your contact details. Thank you

Contact details