Counter Pulse
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 Black Calorie Counter Monitor Heart Rate Pulse Watch  US $.99
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 New Blue Heart Rate Pulse Watch Counter Monitor Sports US $.99
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 Exercise Pulse Heart Rate Monitor Counter Sport Watch US $.20
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 CALORIE COUNTER SPROT MONITOR PULSE HEART RATE WATCH US US $.99
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 Heart Pulse Rate Monitor Calorie Counter Sport Watch US $.99
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 Heart Rate Monitor Calorie Counter Fitness Pulse Watch US $.99
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 Gym Sports Heart Pulse Rate Calorie Counter Watch Black US $13.21
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 Pulse Heart Rate Monitor Calories Counter Fitness Watch US $15.74
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 NEW BLUE CALORIE COUNTER PULSE HEART RATE MONITOR WATCH US $.01
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 Pulse Heart Rate Monitor Calories Counter Watch Fitness US $.99
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 Brunton Pedometer with Pulse Step Counter Exercise US $9.99
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 DIGITAL CALORIE COUNTER PULSE HEART RATE MONITOR WATCH US $.01
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 Heart Rate Calorie Monitor Sport Watch Pulse Counter US US $.01
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 HEART RATE CALORIE COUNTER WATCH PULSE MONITOR SPORT US US $.01
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 BLUEBLACK HEART RATE PULSE COUNTER MONITOR SPORT WATCH US $.01
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 Heart Exercise Pulse Rate Monitor Counter Sport Watch US $1.79
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 Pulse Heart Rate Calorie Counter Monitor Stop Watch YW US $3.49
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 Calorie Counter Heart Rate Pulse Monitor Stop Watch US $1.00
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 BLUE CALORIE COUNTER PULSE HEART RATE MONITOR WATCH NEW US $.01
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 New Calorie Counter Monitor Pulse Heart Rate Watch Blue US $3.49
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 Calorie Counter Heart Rate Pulse Monitor Sport Watch US $1.00
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 Sport Watch Calorie Counter Heart Rate Pulse Monitor US $1.00
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 Digital Pulse Calories Counter Timer Watch 0925 GREY US $11.35
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 Digital Pulse Calories Counter Timer Watch 0925 BLACK US $11.35
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 Digital Pulse Rate Calories Counter Watch 0925 NEW BLUE US $11.99
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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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Impact Sports ePulse Strapless Heart Rate Monitor Watch and Calorimeter List Price: $129.95 Sale Price: $99.70 Used From: $84.74 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: $19.79 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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Markwort Pulse Pedometer List Price: $20.00 Sale Price: $15.99 |
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Pulse/heart-rate sensor. Press the red button and place your fingertip on the sensor and in just a few seconds you see your heart rate (beats per minute).ÊCounts steps, miles and calories. Weekly memory... |
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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 |
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Making PIC Microcontroller Instruments and Controllers List Price: $49.95 Average Rating:  |
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Essential Design Techniques From the Workbench of a Pro Harness the power of the PIC microcontroller unit with practical, common-sense instruction from an engineering expert. Through eight real-world projects, clear illustrations, and detailed schematics, Making PIC Microcontroller Instruments and Controllers shows you, step-by-step, how to design and build versatile PIC-based devices... |
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.
