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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Wireless Heart Rate Monitor
Hi,
Does anyone have or is familiar with designing/building a receiver for the Polar Heart Rate Monitor transmitter? Thanks, Mark |
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Are you talking MICS (Medical Implant Communications Service)?
"Mark Witczak" wrote in message news:nCwQd.36312$Vg3.2296@lakeread05... Hi, Does anyone have or is familiar with designing/building a receiver for the Polar Heart Rate Monitor transmitter? Thanks, Mark |
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Mark Witczak wrote in news:nCwQd.36312$Vg3.2296
@lakeread05: Hi, Does anyone have or is familiar with designing/building a receiver for the Polar Heart Rate Monitor transmitter? Thanks, Mark First, Polar makes a small stand-alone receiver unit for their transmitters. The transmitters output a "burst" at 5KHz for each qrs detected. At this frequency, you don't use a conventional antenna, but rather a resonance-tuned coupling coil. The range is *very* limited (less than 2 meters) and is prone to interference. I gave up on the Polar stuff and made my own system using off-the-shelf RF modules at 413MHz. |
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On Wed, 16 Feb 2005 00:50:42 GMT, the renowned "Thomas Magma"
wrote: Are you talking MICS (Medical Implant Communications Service)? Polar is (Swiss) a manufacturer of wris****ch-Heart Rate Monitors (HRM) that are used by people working out. They have a separate transmitter that straps around your chest, and a receiver in the wris****ch. They're a consumer product, albeit a niche one. Their manuals are a bit.. opaque. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
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-- jan piste kronlund at tuubi1 piste net Please notice my new address! Osoitteeni on muuttunut, oikea on yllä. "Mark Witczak" wrote in message news:nCwQd.36312$Vg3.2296@lakeread05... Hi, Does anyone have or is familiar with designing/building a receiver for the Polar Heart Rate Monitor transmitter? Thanks, Mark Just a little correction, Polar is Finnish company www.polar.fi ;-) Jan |
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Spehro Pefhany wrote: On Wed, 16 Feb 2005 00:50:42 GMT, the renowned "Thomas Magma" wrote: Are you talking MICS (Medical Implant Communications Service)? Polar is (Swiss) a manufacturer of wris****ch-Heart Rate Monitors (HRM) that are used by people working out. They have a separate transmitter that straps around your chest, and a receiver in the wris****ch. They're a consumer product, albeit a niche one. Their manuals are a bit.. opaque. The battery in the wrist watch is a consumer changeout, but the transmitter must be returned to the service center when the battery dies- every two-three years or so- it is a sealed unit. |
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Fred Bloggs wrote in news:421339E8.3050102
@nospam.com: Spehro Pefhany wrote: On Wed, 16 Feb 2005 00:50:42 GMT, the renowned "Thomas Magma" wrote: Are you talking MICS (Medical Implant Communications Service)? Polar is (Swiss) a manufacturer of wris****ch-Heart Rate Monitors (HRM) that are used by people working out. They have a separate transmitter that straps around your chest, and a receiver in the wris****ch. They're a consumer product, albeit a niche one. Their manuals are a bit.. opaque. The battery in the wrist watch is a consumer changeout, but the transmitter must be returned to the service center when the battery dies- every two-three years or so- it is a sealed unit. I'd like to see a consumer of a S410 change the battery. It is a bitch and is a testament to cheap ****/unobtainable customer service. Polar is cheap crap, with .009mm AL metal type battery cage and soft plastic, coupled with nessicity for complete dissasembly - separation of LCD panel from PCB! Short battery life. I would have paid hundreds of dollars for the 6 month battery life of this POS, if I didn't have the nuts to change it myself 4 times. In two years. The plastic tabs that hold the battery are wearing out. Short battery life + expensive HRM + needing to line up the 20+ graphite pads on the display to the PCB = **** you polar. A $12 Chinese Timex is a bargain (battery changing wise) compared to the this abomination. Shop around. Venting, thanks! Dave |
#8
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Mark Witczak wrote:
Hi, Does anyone have or is familiar with designing/building a receiver for the Polar Heart Rate Monitor transmitter? Thanks, Mark You might find this helpful: http://rick.mollprojects.com/hrm/index.html I'm sure the design could be improved, but it's worked for me; and at least a few others have built working copies. Rick Moll |
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