Introduction: Logic Probe Kit

The following instructions will allow you to build a practical test tool for troubleshooting and analyzing digital and microcontroller circuits. The complete Assembly and Instruction Manual can be downloaded from the the following web link:Don's Projects

Step 1: Bill of Materials

Here's the components needed to build the Logic Probe shown in the Bill of Materials (BOM) picture.

Step 2: Logic Probe Circuit Schematic Diagram

Here's the circuit schematic diagram for the Logic Probe.

Step 3: Adding Resistors

Add the 1K and 330/470 ohm resistors onto the pcb and solder.

Step 4: Add the (2) Capacitors

Place the (2) 150nf (0.15uF) capacitors onto the pcb and solder.

Step 5: Add Battery Clip, Battery, 7 Segment LED Display, and Hex Inverter IC

Add a 5V Voltage Regulator IC, (2) 14 Pin DIP sockets, the Hex Inverter IC and the 7 Segment LED display components onto the pcb and solder them.

Step 6: Add the 9V Battery

Snap a 9V Battery to the battery clip. The Letter L should be displayed on the 7 Segment LED Display. Next soldered a red wire on the pcb where "Probe" is located. Last, soldered a black wire next to the black wire attached to the 9V Battery Clip. Now, the Logic Probe is ready to trouble or analyze digital or microcontroller circuits.


hunaintariq made it! (author)2012-07-18

i want to make this project on pcb kindly help me out please. ASAP

material_hirdles made it! (author)2011-10-12

Nice Job!!! Will it able to show pulse as well ???

It would be highly appreciated if u kindly post a demo video!!


frollard made it! (author)2008-06-27

Great Job! Hackaday tagged! Neat little build, I didn't see, where does one get a hold of the pcb?

Mrdon219 made it! (author)Mrdon2192008-06-30

I'll be posting cost info on the kit at my blog within a couple of days.

About This Instructable




Bio: I'm an Electrical Engineer, Technical Book Author, and engineering education advocation.
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