CSD_logic_probe bill of materials (BOM)
Step #3: Pulsed-signals detection. 

https://digsys.upc.edu/csd/P01/Logic_Probe/Logic_probe.html


"DW1" white LED 5.0mm, biased at 10 mA
"RW1","180 Ohm"

"CP1","47pF", ceramic disc capacitor
"CP2","100nF", ceramic disc capacitor

"QP1","TN0702" small-signal NMOS transistor to drive the white LED
"DP1,DP2, "1N4148", small-signal fast switching diodes

"RP1,RP2","1M"
"RP3","560k",
"RP4", "10k"