Changes in 9f34139: voltage

				Board-dat/NWI/NWI1118-dat/NWI1118-DAT.md
			
          @@ -53,7 +53,10 @@

           - [[esp-relay-board-dat]]

           - [[ESP-12F-DAT]] - [[ESP32-­C3-­WROOM-­02-DAT]]

          -- [[ACDC-SM]]

          +

          +- [[ACDC-SM]] - [[voltage-divider-dat]]

          +

          +

           - code reference - [[NWI1139-DAT]]

				Tech-dat/power-dat/voltage-divider-dat/2025-05-14-18-12-31.png
			
          Binary files /dev/null and b/Tech-dat/power-dat/voltage-divider-dat/2025-05-14-18-12-31.png differ

				Tech-dat/power-dat/voltage-divider-dat/voltage-divider-dat.md
			
          @@ -16,7 +16,10 @@ Vout = Vin * (R2 / (R1 + R2))

               0.952V = 5V * (51K / (51K + 12K) )

               0.571V = 3V * (51K / (51K + 12K) )

          +Vin == Vout * (R1 + R2) / R2

          +    == 1V * (220K + 100K) / 100K

          +    == 3.2V

           A voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. The formula for calculating the output voltage is based on Ohms Law and is shown below.

          @@ -29,6 +32,13 @@ where:

           - R2 is the resistance of the 2nd resistor, measured in Ohms (Ω).

           - Vout is the output voltage, measured in volts (V),

          +## [[NWI1118-dat]] on board ADC voltage ladder 

          +

          +cut off SJ3 first to use the ADC ladder. 

          +

          +![](2025-05-14-18-12-31.png)

          +

          +

           ## ref 

           - https://learn.sparkfun.com/tutorials/voltage-dividers/all#:~:text=A%20voltage%20divider%20is%20a,most%20fundamental%20circuits%20in%20electronics.

...	...	@@ -53,7 +53,10 @@
53	53	- [[esp-relay-board-dat]]
54	54
55	55	- [[ESP-12F-DAT]] - [[ESP32-C3-WROOM-02-DAT]]
56		-- [[ACDC-SM]]
	56	+
	57	+- [[ACDC-SM]] - [[voltage-divider-dat]]
	58	+
	59	+
57	60	- code reference - [[NWI1139-DAT]]
58	61
59	62

...	...	@@ -16,7 +16,10 @@ Vout = Vin * (R2 / (R1 + R2))
16	16	0.952V = 5V * (51K / (51K + 12K) )
17	17	0.571V = 3V * (51K / (51K + 12K) )
18	18
	19	+Vin == Vout * (R1 + R2) / R2
19	20
	21	+ == 1V * (220K + 100K) / 100K
	22	+ == 3.2V
20	23
21	24	A voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. The formula for calculating the output voltage is based on Ohms Law and is shown below.
22	25
...	...	@@ -29,6 +32,13 @@ where:
29	32	- R2 is the resistance of the 2nd resistor, measured in Ohms (Ω).
30	33	- Vout is the output voltage, measured in volts (V),
31	34
	35	+## [[NWI1118-dat]] on board ADC voltage ladder
	36	+
	37	+cut off SJ3 first to use the ADC ladder.
	38	+
	39	+![](2025-05-14-18-12-31.png)
	40	+
	41	+
32	42	## ref
33	43
34	44	- https://learn.sparkfun.com/tutorials/voltage-dividers/all#:~:text=A%20voltage%20divider%20is%20a,most%20fundamental%20circuits%20in%20electronics.