Counter Pulse
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 Pulse Heart Rate Monitor Calories Counter Fitness Watch  US $14.95
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 Exercise Pulse Heart Rate Monitor Counter Sport Watch US $1.69
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 Heart Rate Monitor Calorie Counter Fitness Pulse Watch US $5.24
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 DIGITAL CALORIE COUNTER PULSE HEART RATE MONITOR WATCH US $.01
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 Heart Exercise Pulse Rate Monitor Counter Sport Watch US $1.79
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 BLUE CALORIE COUNTER PULSE HEART RATE MONITOR WATCH NEW US $.01
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 BLUEBLACK HEART RATE PULSE COUNTER MONITOR SPORT WATCH US $.01
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 Heart Pulse Rate Monitor Calorie Counter Sport Watch US $9.99
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 Brunton Pedometer with Pulse Step Counter Exercise US $9.99
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 Gym Heart Rate Pulse Calorie Counter Monitor Stop Watch US $1.47
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 HEART RATE CALORIE COUNTER WATCH PULSE MONITOR SPORT US US $.01
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 New Heart Rate Calorie Monitor Counter Pulse watch 39 US $9.99
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 EIP MICROWAVE PULSE COUNTER MODEL 451 US $49.99
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 Sport Calorie Heart Pulse Rate Monitor Counter Watch US $.99
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 Exercise Stop Watch Calorie Heart Pulse Rate Counter US $1.00
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 Sport Calorie Heart Pulse Rate Counter Watch Monitor US $1.00
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 Sport Calorie Heart Pulse Rate Counter Watch S217 US $4.99
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 New Calorie Counter Pulse Heart Rate Monitor Stop Watch US $1.99
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 Calorie Counter Heart Rate Pulse Monitor Sport Watch US $1.69
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 Gym Calorie Heart Pulse Rate Counter Monitor Stopwatch US $1.00
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 Sport Calorie Heart Pulse Rate Counter WatchMonitor US $8.15
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 Pulse Heart Rate Counter Calories Monitor Watch Sport US $.99
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 Sports Pulse Heart Rate Calorie Counter watch Monitor US $10.99
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 Calorie Counter Pulse Heart Rate Monitor Stop Watch WHI US $7.82
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 Sport Calorie Heart Pulse Rate Monitor Counter Watch US $10.35
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Impact Sports ePulse Strapless Heart Rate Monitor Watch and Calorimeter List Price: $129.95 Sale Price: $99.70 Used From: $81.99 Average Rating:   |
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Dynamic heart rate monitors have traditionally required an uncomfortable chest strap and compatible watch, practically restricting their use to serious athletes. Enter the ePulse, the world's first armband heart rate monitor and calorimeter... |
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Calorie Heart Rate Pulse Watch: Five Modes: Sports Watch Sale Price: $19.29 Average Rating:  |
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Select Heart Rate Watch is an excellent workout companion by providing helpful information to achieve your fitness and weight loss goals. The display features include showing your heart rate with touch of your thumb, your personalized heart rate, and the number of calories burned while exercising... |
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SIGMA ONYX Balance Heart Rate Monitor Watch List Price: $89.99 Sale Price: $80.99 Average Rating: |
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Sleek design for active women. Simple to use, focused on the most important functions and a sleek design characterise the Onyx Balance. Striking details make all the difference on this digitally coded heart rate watch... |
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Aro 59095-1 Pneumatic Pulse Counter Sale Price: $289.22 |
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Aro Pneumatic Pulse Counter 59095-1 Counter Pneumatic Control Valves Pneumatic Pulse Counter NPT Port 1/8 In Digital Readout 6 Digits Operating Te |
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Oregon Scientific PE826 Pedometer with Pulse Meter List Price: $29.95 Sale Price: $18.46 Average Rating:  |
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PEDOMETER, PE826, W/PULSE METER-LIFE |
Need to modify signal for digital counter?
I am trying to count pulses with an Omron H7CX digital counter. The counter has the following specs:
Max. counting speed: 5 kHz
Hight level: 4.5 to 30 VDC
Low level: 0 to 2 VDC
Input resistance: Approx. 4.7 kOhm
My signal source is:
+5 V, 500 ns wide; 50-W output impedance
I can count this signal with a 1 Mhz TTL counter, but the Omron gives no counts. Is there a simple chip I can use to adjust the signal?
What you need is called a "pulse stretcher". You can google that and find lots of examples.
The attached reference has one example that uses a single CMO hex Schmidt-trigger inverter chip with a few external components. The circuit will work fine at five volts with any one of the three chips mentioned: 74HC14, 74C14 or CD40106.
The function is also called a one-shot, although the trigger isn't necessarily the same polarity as the output signal. The second link has a couple of chip examples.
