In this video tutorial we will see how to make a logic tip, on a printed circuit, with the integrated circuit sn7404, a 7-segment display, the transistor 2n3904 and other electronic components, from the defunct cekit magazine, but with a pcb design of our own.

What is a logical tip?

A logic probe is an instrument that detects the presence of high and low levels, or pulse signals at any point in a digital circuit.

Electronic components

An integrated circuit sn7404

Description

IC INVERTER 6CH 6-INP 14DIP

Data sheet

sn74s04

Pinout

An A-561 sr Display

Description

DISPLAY 7SEG 0.56″ SGL RED 18DIP

Detailed description

Display Modules – LED Character & Numeric Red 7-Segment 1 Character Common Anode 1.75V 10mA 0.750″ H x 0.500″ W x 0.325″ D (19.05mm x 12.70mm x 8.25mm) 10-DIP (0.600″, 15.24mm)

Data sheet

CA561SR_GW

Pinout

A 2n3904 transistor

Description

SMALL SIGNAL BIPOLAR TRANSISTOR

Detailed description

Transistors – Bipolar (BJT) – Single NPN 40 V 200 mA 300 MHz 625 mW Through Hole TO-92-3

Data sheet

2n3904

Pinout

Five 220 ohm resistors

A 1 KOhm resistor

A 10 Kohm resistor

470 Ohm Resistor

A pin

Electronic diagram

PCB