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3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio
3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio
3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio
3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio
3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio
3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio

3.3V Cmos Logic Probe Dual Input 3-5V Operation With Pulse LEDs and Pulse Audio

$ 27.98

Availability: 100 in stock
  • Return shipping will be paid by: Buyer
  • Item must be returned within: 30 Days
  • All returns accepted: Returns Accepted
  • Refund will be given as: Money Back
  • Condition: New
  • MPN: Does Not Apply
  • Brand: Unbranded
  • Restocking Fee: No

    Description

    Two independent circuits for use with 3-5V Cmos logic. Circuit A is the probe along with an external input, circuit B is only an external input.
    A has Hi, Lo, and rising edge LEDs
    B has Hi, Lo, and falling edge LEDs
    Both have a switchable beeper that follows the edge LED
    Both edge detectors are available as open drains externally
    Edge detection is a .4s pulse applied to the LED, beeper, and external fet
    Power is taken from the logic circuit being observed
    External connections are via a DB9 male connector. The included 12" DB9 female cable is terminated in .025" square female connectors that mate with standard .025" pins. I include 4 Tektronics grabbers that fit on the .025" females
    Measures 3.8" x 1.7" x 1" with a 1.6" probe
    If you're inclined to modify stuff, the probe is all through hole construction, ICs are socketed, and you get a schematic.
    I use zeners to provide some overvoltage protection. When the supply voltage exceeds 8.5V the overvoltage LED comes on as a warning.
    Inputs are biased to the midpoint of the supply voltage via 1M resistors, so probing hi Z circuits can affect those circuits.
    Minimum pulse detection is about 15 us, if you need fast this isn't for you.
    Rather large for a probe, but it's not uncomfortable to hold, and you can use the external connections and lay it down to look and listen.