All Questions
Tagged with power-consumption battery-operated
12
questions
2
votes
2
answers
205
views
How does this LED last this long?
Before the end of last year, dad asked me for some small red light for his cabin, to pretend there is an alarm activated. He wanted it battery powered, so it can glow when electricity is turned off.
I ...
- 31
0
votes
2
answers
233
views
How to reduce power in barebone setup of atmega328p?
For every 15 minutes once ultrasonic sensor data will be send to the receiver using nRF24L01. I'm using atmega328P with battery power using AAA*3 battery and it should operate at least 15 days. Can ...
- 74
0
votes
1
answer
580
views
Leakage current through push-button and switch
I am developing a battery-powered application on a custom PCB, thus power consumption is critical. I am trying to minimize current consumption with stm32L4 MCU, by turning floating pins to analog, ...
- 113
1
vote
2
answers
1k
views
What is the peak current for CR, LIR and AA batteries?
I'm working on a project that requires low energy consumption. In standby mode, it will consume about 11uA. However, when it starts working (it will transmit data in RF), the current goes up to 121mA. ...
0
votes
0
answers
390
views
LM4890 amplifier and CR1616, how to improve power consumption?
I'm a hobbyst trying to design a simple circuit for amplifying the PWM audio output of an ATTINY85. I'm using an LM4890 (1W amp) and a 1W microspeaker. The problem comes when I supply 3V with a small ...
- 423
-5
votes
1
answer
472
views
Battery capacity calculation/method [closed]
While calculating battery power capacity requirement for a circuit consisting of multiple loads having different power consumption, how should one proceed to avoid any error? How it is done in ...
- 1
-2
votes
1
answer
239
views
Battery Run-time/capacity calculation
Problem is to find the difference in run-time between:
a. Using 12V 10Ah battery vs 24V 5Ah battery.
PS: Load is rated at 12VDC and 24V to 12V step-down conversion is available.
- 1
-1
votes
1
answer
456
views
How to calculate 18650 battery use time?
I am currently powering my mini fan using a normal power bank (the one used for smartphone) which is 5V, 2A output and can last for around 6-7 hours.
If I power my fan using two 18650 3.7V 2300mAh (...
- 15
0
votes
0
answers
45
views
Batteries have spare capacity when unused for minutes after running out? [duplicate]
I tested it with NiZN batteries:
After they ran out of power, I measured their voltage. 0.9V.
I waited 15 minutes, measured again without charging, and it was at 1.5V.
I continued operating a CD ...
- 752
0
votes
2
answers
577
views
3V7 to 5V level conversion
In my product i am using a wifi module requires 3.3v and a bunch of other components requires 5v. For this i am using 3.7v 3000mAh battery. So here i have a doubt whether to use which case or any ...
- 109
5
votes
2
answers
790
views
5 year run time on small battery
I am working on a project that checks a sensor every 12 hours and reports the status via cellular modem to our server ..
Power consumption is less than 1mA during sleep mode and spikes to 900mA ...
- 53
2
votes
2
answers
445
views
Power analysis of a simple circuit and battery lifetimes
I only do electronics stuff as a hobby so forgive my simple question.
I have a simple IR LED/photodiode detector circuit hooked up to an arduino microcontroller. It's not important but the purpose is ...
- 377