An excellent hardware engineer with RF design experience

CMT is seeking bids for time and cost to create a hardware design and layout for a small circuit board

based on the TI CC2652 microcontroller, plus supporting circuitry (e.g. power, clocks, integrated BLE

antenna, sensor connections, etc)This board will be worn at the nape of the neck, integrated into a sof

skull cap for sports and other highly physical activities. As such, it cannot have any sharp corners or

significant protrusions that may cause injury to the wearer. It will require a sof slimline case or

conformal coating to protect it from sweat and rain, and ideally use water resistant connectors for the

external sensors. External sensors will consist of eight (8) fabric-based sensors integrated into the cap.

Nominally each sensor is connected via a mico-coax cable, for 16 total conductors.

Ideally this board will be as tightly packed and physically small as possible. In many ways, this board will

be quite similar to the TI “SensorTag” reference design (attached). Note especially RF design guidelines

and section 7.3, Layout recommendations. High level requirements follow:

I. Physical

a. Total board size should not exceed 30 x 40mm and be as thin and light as possible.

b. Board is expected to be 4 layer unless significant advantages can be gained otherwise.

c. All corners should be rounded w/ min 4-5mm radius, larger radii preferred if space.

d. SMD Carrier for CR-2032 battery.

e. Ideally, all components (pehaps excluding the battery if necessary) should be on a single

side, with no sharp through-hole protrusions. Some variation allowed where necessary.

II. External Connections

a. Battery (SMD carrier for CR-2032)

b. External Sensors (for 8 fabric sensors)

i. 16 conductor connector – perhaps FPC pr FFC, even direct solder is a

consideration (especially with conformal coat). Other suggestions welcome.

ii. Note that sensors are capacitive, design must respect this appropriately.

c. RF Antenna

i. Should have an integrated BLE antenna on the board...

ii. But an external antenna design could be possible – make recommendations

iii. Design for BLE 5 long-range (Need >100m realistic usable range. General use

case: flat outdoor field with few obstructions, but likely other BLE interference.)

III. On board sensors

a. On-board sensors shall be similar to a subset of the TI dev board, but alternative sensors

selections may be made as long as basic functionality remains. Alternative selections to

reduce power, cost, and/or physical board size are encouraged.

b. Ambient Light (OPT3001 or similar)

c. Infrared Temperature (TMP007 or similar)

d. Ambient Temperature (HDC1000 or similar)

e. Humidity (HDC1000 or similar)

f. Accelerometer (MCU-9250 or similar)

i. In particular, this and the Gyro seem to be most likely to be damaged. High “G”

force models are preferred. Ideally should handle impacets in the 300 – 500 G

range without damage, even if beyond the usable range of the sensor.

g. Gyroscope (MCU-9250 or similar)

h. Pressure (Altimiter) (BMP280 or similar)

IV. Future considerations

a. To the extent allowable, future-proof the design by considering the following variants,

and making alllowances and accomodations, or help make them easy to add later.

i. TI CC 1352 Sub-GHz variant for extrememly long rang (> 1km)

ii. External antenna variant – using a flexible wire antenna around the hat band

iii. Variant/Option to include a TI CC2590 or CC2592 LNA/Power Amplifier for

additional range (BLE/CC2652 2.4 GHz version only)

iv. A microswitch push button or two for debug and test (optionally populated for

production too)

v. Additional Flash memory for keeping a complete lifecycle data history. (2-4M)

vi. Possible micro-USB Debug/Programming port (though most programming

should be OTA)

Znanja: Elektro inženiring, Mikrokontroler, Oblikovanje tiskanih vezij v PBC

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O delodajalcu:
( 0 mnenja ) United States

ID projekta: #17274912

16 freelancerjev ponuja v povprečju za $1225 na tem delu


Hi good day very high skill in RF Senior ENGINEER has more of 40 years’ experience in this profession, developing Hardware and Software Expertise in video processing and associated simulation and evaluation tools an Več

$1666 USD v 10 dneh
(48 Ocen)
$1323 USD v 20 dneh
(22 Ocen)

Hi Sir, We are expert in handling RF designs, we take care of EMI considerations and also other issues. Lets talk to us on your project. we are able to do it for you sir. We are professional engineers and develop Več

$1000 USD v 28 dneh
(30 Ocen)

i am a embedded hardware and software expert and have rich experience with hardware design. i designed pcbs and developed firmware for it , manufactured prototype directly. you can check my skills on my profile. i Več

$1250 USD v 20 dneh
(18 Ocen)

Hello I am very interested to work in your job because it is good fit for me. I have rich experiences with PCB design using Altium, Eagle, OrCAD, KiCAD and so on. I can handle this project to the end and hope you are g Več

$1176 USD v 20 dneh
(7 Ocen)

Hello. My name is Vusi and I'm an Electronic Engineer, you can learn more about me from my website at [login to view URL]

$1000 USD v 15 dneh
(8 Ocen)

Hi, I would love to assist you in designing this Soft Skull Cap with Integrated Sensors. I have read your description and would like to discuss more so please send me a medsage. I am doing MS Electrical Engineering Več

$1000 USD v 20 dneh
(16 Ocen)

Dear Sir, I am an highly skilled board designer who has over 17 years experience on complex, multi layers PCB design. I can provide you with service from schematic entry to PCB Layout.I can also provide the prototyp Več

$1333 USD v 15 dneh
(106 Ocen)

Hello there, I have read your project description and I can say that I can do that for you. I have checked design files for Sensor tag and also for CC26x2R development kit and to redo those with your suggestions wont b Več

$920 USD v 30 dneh
(17 Ocen)

Hi. I am a design engineer and researcher working on similar projects for EMOS Technologies. can share you details in chat. your work is similar to use BLE TI Modules for neck device integrating all components. Pls see Več

$1333 USD v 10 dneh
(8 Ocen)

Hello my name is Roman. I represent Webcapitan team. We are team of 12 professionals and we are ready to make a wonderful design and website for you. We have a lot of experience in it, please check my portfolio and le Več

$1323 USD v 20 dneh
(0 Ocen)

Hi, I read your project description. Your project is really interesting to me and i can do your project perfectly. I will do my best. Thank you for your attention.

$1250 USD v 20 dneh
(34 Ocen)

Hello, I have many years of experience in the development of electronics. I have amp projects I can prepare all the technical documentation for mass production. Also fulfill all conditions for certification CE, Več

$1333 USD v 25 dneh
(1 Ocena)

Dear Sir, I have expertise in designing extremely low power and low profile electronic circuits. I can provide, an excellent miniature circuit device for your project. Best Wishes

$1111 USD v 22 dneh
(4 Ocen)

Hello there I've expertise on pcb designing up to 4 layers. I have also developed pcb for few products inducing tiny MEMS sensors having Wireless SOC Kindly Go through my profile for Več

$1333 USD v 30 dneh
(0 Ocen)

I'm very interesting in your project. Because I've ever developed full IOT system for garden management. by using several sensors(temperature/light/moisture/ozone), actuators(water pump/lamp/motors). In detail I've Več

$1250 USD v 20 dneh
(1 Ocena)