LOGIC PROBE CIRCUIT DIAGRAM USING 4049
Build Your Own Logic Probe on the Cheap Using a 555 Timer
A logic probe is helpful when working with various chips. By using a logic probe, you can tell if a pin on a chip has high or low voltage by observing the two LEDs on the circuit. This circuit uses a 555 timer in power ranges of 5V-18V.
DIY LOGIC PROBE - Schematic - YouTube
Nov 19, 2015Using 1 npn transistor, 2 resistors, 1 green led, 1 red led, alligator clip, test probe. DIY LOGIC PROBE - Schematic Aldrin Floyd. Loading.. Unsubscribe from Aldrin Floyd?
How to Build a Logic Probe
How to Build a Logic Probe. In this project, we are going to build a logic probe using a 4011 NAND gate chip. This logic probe will light up green if the logic signal is HIGH and red if the logic signal is LOW. So it works pretty much like a typical logic probe. This logic probe will be built using a single chip, the 4011 NAND gate chip.
TRANSISTORISED LOGIC PROBE FOR TTL | Electronics For You
Sep 01, 2009As shown in Fig. 1, the logic probe circuit is built around four transistors and a few passive components. It uses two LEDs that show logic states 1 (green) and 0 (red). The green LED glows when the voltage at probe tip exceeds about 2 and the red LED glows when this voltage falls below about 1,..
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