tlfong01 wrote: ↑Tue Jun 19, 2018 8:22 am
I also bought a couple of NPN driver, High level trigger modules, for only 3 yuen each. Now I am checking out their Vin turn on and Vin turn off voltages.
Now these opto high/low select modules costs me 5 yuan each.
Test results
Sample 1
Select High - Vin on = 1.99V, Vin off = 1.55V
Select Low - Vin on = 2.90V,
Vin off = 3.45V (Rpi relay newbie's sorrow!)
Sample 2
Select High - Vin on = 1.92V, Vin off = 1.62V
Select Low - Vin on = 2.90V,
Vin off = 3.27V (Rpi relay newbie's sorrow!)
Sample 3
Select High - Vin on = 1.95V, Vin off = 1.59V
Select Low - Vin on = 3.01V,
Vin off = 3.42V(Rpi relay newbie's sorrow!)
Sample 4
Select High - Vin on = 1.95V, Vin off = 1.53V
Select Low - Vin on = 3.01V,
Vin off = 3.49V (Rpi relay newbie's sorrow!)
Sample 5
Select High - Vin on = 1.81V, Vin off = 1.66V
Select Low - Vin on = 3.09V,
Vin off = 3.47V (Rpi relay newbie's sorrow!)