e-Seal is an advance electronic container seal replacing conventional bolt-seal. The basic function of an e-Seal is the same as traditional seal. However, it can be sealed and unsealed for many times during the whole process. Typically it can be used in container transportation to keep record of each operation of seal and unseal and improve logistic safety level.
We have disassembled an active e-Seal used in container tagging and monitoring. This e-seal tag is based on proprietary 2.4GHz air protocol.
Specifications:
Identify range: max=40m (work with SP-RFS-300, in the air)
Frequency: 2.4~2.8GHz
Sensitivity: -80dbm ~ -90dbm
Battery life expectation: long work life from 6 to 8 years
ID number: 64 bit
Temperature: -40℃ ～ +80℃
Storage temperature: -60℃ ～ +85℃
Anti electromagnetism: 10V/m 0.1～1000MHz AM electromagnetic waves
Vibration: 10～2000Hz 15g three axes
Free dropping: 1500mm concrete floor，twice on each side
External dimension: 67mm x 79mm x 23mm
Proofing level of the shell: IP54
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I wrote this post because I googled and don’t seem to find any information on auto gate PCB troubleshooting and repair tips. I have repaired more than 20 pieces of auto gate controller PCB of different types. Below are my observation and something to share. Hopefully this post helps!
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M6e is the world’s smallest 1 Watt, four port UHF reader module on the market today, delivering leading performance and significant time-to-market advantages to original equipment manufacturers (OEM), value added resellers (VAR), and solution providers looking to add RFID to existing product lines or designing and building new solutions from the ground up.
The Mercury6e (M6e) embedded UHF RFID reader module offers world leading performance, form factor, and time-to-market advantages to OEM, Value Added Reseller, and Solution Provider customers. It is designed to the performance standards of full size readers, but is small and efficient enough to be used in mobile applications. The M6e supports 4 ports and will operate to a level of +31.5 dBm. Serial and USB interfaces are provided to support both board-to-board and board-to-host connectivity.
Features of the Mercury6e RFID reader module include:
- Multiprotocol support including EPCglobal Gen 2 (ISO 18000-6C) with DRM, ISO 18000-6B (optional) and IP-X (optional)
- Four 50 Ohm MMCX connectors supporting four monostatic antennas
- Separate read and write levels, command-adjustable from 5 dBm to 31.5 dBm (1.4W) with +/0.5 dBm accuracy above +15 dBm
- Support for full 860 to 960 MHz UHF RFID carrier frequency range to accommodate worldwide regulations
- Certifiable for operation in countries adopting FCC, ETSI, MIC (KR) and SRRC-MII (P.R. China) regulatory specifications
- TTL level asynchronous data interface supporting speeds up to 921.6 kbps
- USB 2.0 full speed device port (up to 12 Mbps)
- Operating temperature range of -40 C to +60 C
- Maximum tag read rate of over 400 tags per second
- Maximum tag read distance of over 30 feet (9 m) with 6 dBi antenna
- 4 GPIO lines controlled through data interface
The M6e Development Board provides simple USB connection to host which allows a complete demo setup in minutes.
M6e Development Kit Complete Set with patch antenna, power adapter, M6e module on demo board, usb cable and UHF (Ultra-High-Frequency) sample tags.
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One of my ceiling fan with electronic remote speed control produces an arcing.. bishhhhhh….bishhhhhh… sound (like an electric shock sound) and it switches the fan speed from low to medium to high, and its like out of control. I have decided to inspect to see what is wrong with the electronics section. I have disassembled the bottom base control section away from the body of the fan motor.
Figure 1: Bottom base control section internal (PCB is sitting inside the fan bottom enclosure so as the IR (Infra Red) receiver is mounted on the bottom of the Light Filter lense.
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Name: Analog & Digital Educational Trainer
Platform/Processor: Compatible with the IDL-800 Digital Lab.
Functions:
Two digits 7-segment LED display
8 Buffered LED display
8 Data Switches & Adapter
Two pulse switch
Two function switch
Power supply (+5V,-5V, Adjustable 0V-15V, -15V-0V)
Digital Volt Meter
Function Generator ( Sine, Cos, Square Waveforms)
Applications: Schools, College & Engineering Institut teaching aid.
Specifications:
Power Supply: Mains supply 115VAC or 220VAC selectable.
Main prototyping PCB
Power Supply Unit
Function Gen. & DVM (right)
Function Gen. & DVM (right) bottom view
Name: Timer Scheduler with yearly program
Platform/Processor: Visual Basic 6 (Windows 95/98/2000/NT/XP)/Philips P89c51RD2 flash MCU
Functions:
Controls output based on yearly pre-programed schedule. User can pre-program 30 tasks/day for 12 month period. When the tasks reaches the clock setting of the unit, it will trigger on the relay output for 1 sec. to 60 mins (based on user programming).
Applications: Digital Calender with activity reminder, School bells, water sprinkler and any applications which requires yearly tasks scheduling to be performed.
Specifications:
Power Supply: 110VAC-260VAC universal input supply, 100mA @ 250VAC
Output Relay rating: 250VAC 10A
Power down mode saves electricity on non active period (programmable).
Power mode/editing and communication LED indicators.
Buzzer Indictor.
Serial Port RS-232 for alarm programming and settings/monitoring.
Built-In real time clock with clock and calender function. +/- 1 min/year accuracy with 3V backup Lithium battery (approx. 10 years backup).
Built-in EEPROM which makes the unit operational in stand-alone applications.
The alarms can be pre-programmed from PC or edited from the keypad and with the graphic LCD screen.
Programmable Daily tasks: 30 tasks
Programmable Monthly Tasks: 30 x 31 days (max) = 930 tasks
Programmable Yearly Tasks: 30 x 31 days x 12 month (max) = 11,160 tasks
Programmable Turn on time (output) = 1 sec. to 60 mins.
Programmable moving sign (Displays on the main screen): 16 characters can be user programmed from keypad or PC.
Front View – Graphic LCD and keyboard interface, RS-232 comm port
Side View – Universal swithing power supply module, RTC backup battery and power C8(IEC) connectors
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Name: Talking Azan
Platform/Processor: Visual Basic 6 (Windows 95/98/2000/NT/XP)/AT89C52 Atmel flash MCU
Functions:
To display the daily prayer times (Waktu Azar, Subuh, Maghrid, ..) and to play the specific pre-recorded prayers. Accurate prediction and calculation of prayer times based on Islamic Kepler System. Supports 256 different zones of prayer location (pre-programmable).
Applications: Reminder for periodic prayer times with pre-recorded voices and visual display.
Specifications:
Power Supply: DC +15V input supply, 1A wall adapter
Audio Amplifier Output Specification: 2W RMS (Mono)
Auto power down mode saves electricity on non active period.
Buzzer Indictor.
Eight 0.5 inch alphanumeric (17-segments) display.
Built-In real time clock with clock and calender function. +/- 1 min/year accuracy with 3V backup Lithium battery (approx. 10 years backup).
Built-in EEPROM for saving settings.
Digital Volume control.
Four push buttons for settings configuration.
Built-in diagnostic options for testing pre-recorded voices and to detect hardware faults (SPI).
8 minutes of high quality 8KHz voice recording to APR6016′s flash memory.
Easy interface to PC for voice recording.
Ramadhan or Muslim “fasting” activation option.
Flexibility to select up to 256 different pre-programmed prayer zones or location.
3-5 minute active reminder.
Top View – Atmel MCU, RTC battery backup. The heatsink and power amplifier on the right hand side.
Talking Azan with speaker connected.
Bottom View – The alphanumeric LED displays sitting side by side on the prototype PCB. SMD parts are also mounted on this side.
Voice Recording Software – Mixer control with *.WAV file selection/ sequential play function.
Product Brief Description
This is a standalone RFID door access controller which supports many available RFID tags in the market. Currently it comes with two version. One supports Mifare type-A tags (ISO-14443A) which are frequenly used as high security tags which stores important information like personal information and cash credit details. In Malaysia, it is embedded inside the new MyKad (Identity Card) to be used as Touch-N-Go Toll pre-paid card.
Fig 1: Left: Malaysia’s Identity Card (MyKad) with Touch-N-Go facility, Right: Standard Mifare Card
The other type is EM-Marine which reads EM4100 tags. They are very commonly used as door access cards. It only keeps the unique ID inside the card. The firmware is implemented on an 8-bit PIC microcontroller and is writen using CCS PIC C compiler.
Pulse and toggle output type are implemented here so that application is not limited to just open a door. With toggle mode, one can use it as a car immobilizer, or perhaps as a public toggle on-off lamp switch. With the OUT connection configurable to Vin or GND, one can also use it as an ARM/DISARM switch for a Home alarm system. Hence, the design of the application is not limited or function specific.
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Features
Mono Power Amplifier with 2.5W-8W output @ 4 ohms
Wide supply voltage from 10V to 22V
Robust construction
General purpose use
Low Cost IC
Low external component count & compact size
Design Objectives
To design a simple and robust power amplifier (mono) system to test pre-amps (a useful tool for designing preamps) or for general purpose usage. I have used it to design a surround-sound decoder which involves a subtracting and summing amplifier configuration to produce the respective rear channel and center/subwoofer channel signals. This amplifier is handy to test and verify each of the stages.
System Operation & Description
A LM380N ‘N’ version with 14 pins are selected because they can dissipate heat well (8.3W) thru their ground pins. Therefore, a heat sink is not required in the design. This further reduce cost and complexity of construction.
The Complete Schematic Diagram
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Features
- 60W per channel into 8 ohms load at less than 0.5% THD+N from 20Hz-20KHz
- Signal-to-Noise Ratio >= 97dB
- Quiet fade-in/out mute mode
- Click and Pop suppression
- SPiKe protection
- Compact Stereo
Design Objectives
The idea is to design a compact power amplifier system. The design should be simple and cost effective while maintaining the sound quality at optimal performance. It should be built modular so that the same PCBs can be simply cascaded to provide additonal 4, 6 or more output channels. The selection of the components to be integrated into the final design are carefully picked to maintain the THD+N performance.
System Operation & Description
The LM4780 power stereo amplifier is configured as a non-inverting amplifier which has to a gain of 20V/V which is high enough to maintain stability and not too high untill increasing the noise and THD+N performance. The input is taken from the RCA jack which then feed to two high quality 1uF metallized polyester film capacifor with 100V rating. The power output socket provides easy push-release terminals for speaker cable connections (see snap-shots picture below).
Fig 1: Schematic diagram taken from NS referance PCB design schematic
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