Questions tagged [coin-cell]
A coin cell (also known as a button cell) is a small round cylindrical battery. They consist of a single cell and are typically 5-20mm in diameter but often only a few millimetres thick therefore having a similar profile to a coin or button.
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Confirming Application of LT1308
I am intending to power a small microcontroller off a coin cell battery. The microcontroller consumes as little as 15 microamps. I have a couple questions:
Just confirming, will the IC work with such ...
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Battery draining faster than predicted based on measured current draw
Summary: I have an LED circuit powered by a coin cell. It loses voltage faster than expected and the LED signal becomes too weak to be useful in an unacceptably short time period.
I have a circuit ...
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Is it safe to connect CR2032 cells in parallel?
As mentioned in the title, I would like to connect two CR2032 cells in parallel to increase their capacity. If they are slightly different voltages then won't the better battery "charge" the ...
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Powering RTC DS3231 through BAT pin while keeping the coin cell battery in place
I'm working on a battery-powered DSLR camera controller with a MCU (ATMEGA328P) that spends most of the time in deep sleep and a RTC (DS3231) that wakes up the MCU a few times a day to take a picture. ...
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Handling large current peaks on CR2032 battery
I’m designing a nRF52832 SOC based device and I came across this issue with energy buffering and battery voltage drop.
I am using a CR2032 battery, nRF52832 SoC and a VCNL3040 proximity sensor.
This ...
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Commercialising an electronic project - Li-ion pouch cells or coin cells?
I'm looking to move past the prototype stage and bring a small, low voltage, wireless electronic project to market. (it's a musical instrument)
The prototype incorporated a Li-ion pouch cell and USB ...
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ML2032 battery charger
I have recently bought some rechargeable ML2032 cells and also bought a charger for it.
Unfortunately the charger does not work, so I tried to find alternatives, but here the problem starts. According ...
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Best way to power a single LED from a battery
I'm looking for a good way to power a single LED with a coin battery (CR2032). Here are some of the requirements/characteristics of the system I'm trying to add this LED to:
I don't need full ...
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Resistor values for LED matrix
I am designing a binary coded watch with an attiny1616 MCU and an LED watchface. The matrix I designed is displayed below along with the rest of the schematic. The LEDs is 2.1V 30mA and I plan to ...
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Coin cell holder not powering circuit
I use a 3023 Keystone electronics, through-hole coin cell holder in my circuit. When I connect the Arduino to my computer, it gets powered up without any issue and my circuit works just fine.
The ...
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Circuit for charging a coin cell battery while also powering main circuitry
I am looking to design a USB rechargeable device that feature a small microcontroller set up to run at low clock frequency driving a few LEDs. I'd like to power it off a 2032 coin cell battery or ...
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TP4056 circuit - have I got this right?
I've designed and built this circuit which seems to work, but this isn't my day job so if anyone's able to take a look at it and let me know if you can see any flaws or potential improvements I'd be ...
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What are these types of coin cell contacts called?
I am working on a low-profile product that will be powered by a coin cell. I've seen some products that use coin cell contacts that allow the battery to be beside the PCB, rather than on top of it. ...
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When do I have to worry about shorting? (Coin cell battery assembly)
At work I assemble coin cell batteries (lithium metal) inside a glovebox. I'm a bit confused as to when I do and do not have to worry about shorting. For example, say I'm making this battery:
Cathode: ...
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HX711 powered directly from coin cell
Is it a good idea to use HX711 in a project (personal weight scale) that is powered directly from a coin cell (CR2032) without any external or its internal voltage regulator? I shut down the whole ...
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