Summary

• Page properties (2 modified, 0 added, 0 removed)

Details

Page properties

Author

...	...	@@ -1,1 +1,1 @@
1		-XWiki.kai
	1	+XWiki.Edwin

Content

...	...	@@ -123,11 +123,13 @@
123	123	* Cell efficient : 22%
124	124	* UV resistance
125	125
	126	+
126	126	== 3.4 Related Document ==
127	127
128	128
129	129	* **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
130	130
	132	+
131	131	== 3.5 Recharge without Solar ==
132	132
133	133
...	...	@@ -171,7 +171,7 @@
171	171	The power consumption mainly include three parts:
172	172
173	173	* Sleep Power  : Most time the CPU are in sleep mode. It is around 6uA, So **for one day**, total power consumption: 6uA x 24(hour) = 144 uAh = 0.144mAh (base on batter output voltage)
174		-* Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
	176	+* Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
175	175	* Sampling Power: The power consume to read sensor for each sampling.
176	176	** Example, SN50v3-LB connect to an external sensor, each reading need to use 5V , and sensor require current 10mA and 2 seconds. So each sampling need 10mA x 2 seconds / 3600 = 0.0056mAh ( base on 5v). Assume 90% converter rate from 3.3v to 5v) , we can consider the mAh in 3.3v is 0.0056mAh/90% = **0.0062mAh per sampling**. If one day, SN50v3-LB read this sensor 3 times every hour. So **for one day**, the total power consumption is 0.0062mAh x 3 x 24 = 0.4464 mAh
177	177	* Transmit & Receive Power: this power consumption depends on the transmit power and the data rate (DR) settings. They are the same for all -LB and -LS series. Below are the reference
...	...	@@ -178,6 +178,7 @@
178	178	** EU868 band, TXP=0 (Max Power), DR=5 （Shortest Distance） : ~~0.0028mAh (base on 3.3v) (per transmit + receive).
179	179	** EU868 band, TXP=0 (Max Power), DR=0 （Longest Distance） :  ~~0.044 mAh (base on 3.3v) (per transmit + receive).
180	180
	183	+
181	181	So for SN50v3 with above sensor, we set 5V output to open 2 seconds every reading and set TDC = 20 minutes. So 72 reading and transmit every day
182	182
183	183	The total power consumption is
...	...	@@ -195,12 +195,6 @@
195	195	)))
196	196
197	197
198		-== 4.3 Method 3: Use AI to calculate. ==
199		-
200		-
201		-
202		-
203		-
204	204	= 5. Debug for Battery running out shortly =
205	205
206	206