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Logic Probe

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Quoting product code: FY73Q

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About this product

Overview

  • Logic probe for use with TTL, DTL and CMOS ICs
  • Memory function which can detect the occurrence of single pulses or logic level
  • One shot and low repeat rate narrow pulses, are easily detectable and visible

Product overview

• Logic probe for use with TTL, DTL and CMOS ICs
• Memory function which can detect the occurrence of single pulses or logic level
• One shot and low repeat rate narrow pulses, are easily detectable and visible
• The probe has three LEDs, red for high logic level, green for low logic level and yellow for pulse
• LED intensity is directly proportional to the duty cycle of the signal observed


Rated 4 out of 5 by from Excellent value, works well The device is a little boxy and feels cheap - but this is a very cheap logic probe! Works at TTL or CMOS levels and the 'pulse/mem' button is basically a latch to catch fleeting 'pulse' signals. The packaging actually describes two different devices, which is confusing, this is just a simple logic probe that would have cost a fortune years ago. For anyone unsure what a logic probe is for, it's for anyone interested in digital electronics wanting to check an active circuit board to see whether pins are in the logic states of zero, one or pulsing (ie have data). Far faster than hooking up a logic analyser, and far more reliable for the most part. If you need to see signal timing, you need an analyser or good oscilloscope, but with a schematic and a knowledge of gates, you can debug easily 80% of problems with this alone. Often old TTL chips will get stuck gates (for instance in old video games), causing strange problems, this can help you track down dodgy chips to replace.
Date published: 2017-01-24
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Specification

Specification
Detection Levels
Logic Lights LED DTL/TTL CMOS
1 Red (Hi) >2.3V ±0.2V >70% of VS ±10%
0 Green (Lo) <0.8V ±0.2V <30% of VS ±10%
Bad No indication 0.8V to 2.3V 30% to 70% of VS
Detectable pulse width: 30ns min
Input impedance: >1MΩ
Input signal Frequency: >17MHz
Input overload Protection: ±220V DC/AC for <15s
Probe power: 25mA to 40mA
Probe power at 5V to 15V DC protection: ±20V max with lead
Dimensions: 212 x 26.5 x 18mm
Weight: 65g

Could you please tell me what the socket on the side of the probe is for? Thank you

Asked by: AlanB
What IC-clip lead? ..or the ground lead... which pin is ground and what is the other one?
Answered by: AlanB
Date published: 2015-07-17

We purchased a couple of these logic testers FY73Q for an export contarct and the customer is asking for a user manual/instruction leaflet, do you have anything available or does it come with instructions enclosed ?
Asked by: Mark Nugent, Wagtech International
Yes, this product does include that
Answered by: DH
Date published: 2015-07-17

Order Code: FY73Q lOGI pROBE - q - DOES THSI HAVE A BUZZER? THANKS sTEVFE
Asked by: STEVE
No sorry
Answered by: JK
Date published: 2015-07-17
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