Logic Probe Circuits

Differential scope probe delivers 6-GHz bandwidth to the screen: 02/20/03 EDN-Design Ideas  /  PDF contains multiple circuits - scroll to find this circuit

Electromagnetic Field Probe with Meter:

EMF Field Probe:

Logic Probe #1:

Logic Probe with Pulse, CMOS:

Logic Probe with Pulse:

Making Differential Probes: For sensing audio signal voltages across devices that are not ground referenced 

Modified Scope Probe Tests Surface-Mount assemblies: 09/25/97 EDN-Design Ideas

PIC Logic Probe with Pulser:

Pulse Reading Logic Probe:

Scope Probe Measures High Frequencies: 01/18/96 EDN-Design Ideas

Simple Logic Probe uses Bicolor LED: 03/13/98 EDN-Design Ideas

TTL Pulse Reading Logic Probe:

Ultra Simple Voltage Probe: