How to test ne555n?

[makiyoung]

Im a beginner in the field of electonics, and I have been trying to put together a IR remote control / laser tag system using Arduino Nano. I am using a TSOP4840 receiver and a TSAL6100 as the emitter, so I need a modulated signal at 40kHz. To do that, I tried to use a NE555timer and use and "and it" with my arduino output pin using a 74HCT08 IC. I made a breadboard circuit.

Here is the ne555n datesheet

 

[glpg80]

So you want to verify that you have 40KHz output from the 555 timer, correct? You'll need an oscilloscope to measure the pulsed output waveform. This pulse will have some amplitude in voltage over some time in frequency. An oscilloscope will allow you to verify the frequency (or period of repetition) and duty cycle (length of the pulse from rising edge to falling edge) at the output.

This link has all of the formulas you will need. It's best to start with known resistor values and solve for C in the first equation for frequency. Here's the link:

https://www.allaboutcircuits.com/tools/ ... e-circuit/

Sounds like a fun project