Electronics Projects
OPTO DEVICES
PROJECT
Logic Probe #1
1- Wire the circuit shown in Figure 10, page 9. Touch the input
"probe" wire to the 5V source. What is the result??
The LED lights up.
2- Touch the probe wire to the source ground. What was the result?
Nothing changed, the LED didn't light up.
3- Explain the operation of this very simple logic probe.
I simply built this little circuit using a LED, a resistance and a 5V
source. This basic circuit is generally used for the pens that checks
whether there is electricity in a surface or not.
