Arduino Nano Logic Probe

This project is a new version of my Arduino Logic Probe, but now constructed with an Arduino Nano instead of an Arduino Uno. A 3-digit display, a few resistors, and the Arduino Nano are practically the components of this interesting project that also did with EasyEda software. This tester can only test "0's" and "1's" from +5V TTL circuit.

What you will need:

1 PCB (EasyEda Design)

1 Common Cathode 3-Digit Display (red)

1 Arduino Nano (included 2:15-Pin Straight Single Row Male Header)

6 Resistors of 470 Ohm

1 Resistor of 10K

1 Alligator Clip Test Lead with two alligators

3 Male to Male Jumper Wires

1 Soldering iron

1 Solder roll

5" Heat shrink tubing (1/4")

Carefully Follow the diagram of your project because you only need insert the components and solder them.

Once installed the common cathode 3-digit display, you should proceed to solder. Check your diagram in the previous step.

Note that R7 is 10K (brown,black, orange) while R1 to R6 are 470 Ohm (yellow, violet, brown). Insert their terminals and fold them so that you can later solder.

Only insert them.

Carefully place the Arduino Nano, permitting the inserting of the pins previously inserted in the PCB. Once placed your Arduino, you can proceed to solder on so that you can later solder under PCB.

Upload the code from: https://pastebin.com/RRAa1SvQ

Fold it at middle.

Cut the wire that you previously folded.

Prepare the wires so that you can solder them.

Take a male to male jumper wire for preparing the positive terminal and before joining it with the alligator wire. Note, you should install a piece of heat shrink tube on the yellow wire.

Take a male to male jumper wire for preparing the negative terminal and before joining it with the alligator wire. Note, you should install a piece of heat shrink tube on the yellow wire.

Now, slide the heat shrink tubes.

You can use a hair dryer to complete the process.

Insert the terminals previously constructed and solder them in its respective place, red (+) and black(-).

Take a male to male jumper wire and insert it into the LP hole and solder it under PCB.

Check if everything is OK, taking the free end of your logic probe (LP). Probing on GND and +5V for checking 0's and 1's respectively. Enjoy it !!!!