- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Background
In 1994 my firm designed two systems for a Navy contractor. We have been asked to redesign the systems using state-of-the-art components and additional functionality. I am looking for guidance in selecting the low-power micro-controller that will minimize the part count. The general specs for the first system is included below.
We also designed a second system for the same contractor. It was "wet side" submarine data collection system. I will follow with a second specification when the new specifications are finalized.
I am looking for guidance in selecting the low-power micro-controller that will minimize the part count.
This system will be used to monitor an area for transient human presence. The mode and operation of the Sensor Component will be determined by the Control Component.
The sensor component will be housed in a hermetically sealed enclosure with a surface mount or embedded ¼ wave dipole and a solar cell.
The control component will be housed in a hermetically sealed enclosure. It will communicate with the Sensor Component to set the mode and receive data generated by the vibration and IR sensors. The control component may have solar charging and/or inductive and or directly connected DC power source. The final power management specifications remains an open item.
The modulation scheme and protocol will allow for multiple sensor components to be controlled by a single control component.
The selection of the 433 mhz may change.
Estimated quantity: 5,000.
Temperature: 0˚f to 100˚f
Humidity: 100%
Power source: Solar/inductive
Power Storage: Super cap or battery
Sensor1: IR Motion
Sensor2: Vibration
Output1: Dry Contact relay closure (up to 24VDC <= 80 ma)
Active life: 24 hrs without charge @ 10% full power operation
Charge period: 2 hours full sun on solar
Transmitter: 433 mhz band
Receiver: 433 mhz band
Modulation: Binary FSK
Transmitted Power: 4 ~ 12 dBM
Receiver sensitivity: 108 dBm
Method to provide unique ID for each Sensor Component
Temperature: 0˚f to 100˚f
Humidity: 100%
Power source: Solar and/or 5 – 24V source
Power Storage: LiPo
Active life: 24 hrs without charge @ 100% full-power operation
Charge period: 2 hours full sun or 5 - 24V source
Transmitter: 433 mhz band
Receiver: 433 mhz band
Modulation: Binary FSK
Transmitted Power: 4 ~ 12 dBM
Receiver sensitivity: 108 dBm
Serial I/O: I2C (for text display)
Input1: 4 position switch
Input2: Push button switch
Output1: Dry Contact relay closure (up to 24VDC – 80 ma)
Output2: Audio Output: Stored waveform, 5mw
Maximum recycle: 30 seconds
Method to provide unique ID for each Control Component
**Attention** This is a public forum
