There is a lot to like about the very stable voltage, current and power readings this device displays with a lot of good resolution too, many digits. I missed having a JST header on Vout port and QWIIC header would have been nice to have too. The 1.5 amp charger capacity is nice instead of being limited to 500 milliamps. There are nice things about this device such as the values returned from the monitor chip are signed or unsigned 16-bit integers, which makes converting to BCD digits for a character display very easy. Makes one wonder what the state of charge really is. When connecting a charger the SOC number immediately changes to something different. It appears to work best when connecting a "rested" battery and then monitor the discharge profile. Never really know what the "real" state of the battery is with numbers shown. Timers are another feature that didn't seem to follow what the data sheet says. Nothing changed the almost static reading 4 digits. Tried different wiring on TS terminals and cut the jumper. Battery Temperature measurement doesn't seem to be reading anything that I can tell. Current and Power measurement are also great with polarity and 5 digits of resolution. Other lithium battery chemistries with lower voltage maximums will not work and will experience an over-voltage event if they're used with this.īattery voltage measurement resolution is great at 3 decimal places to the right. > Sparkfun: Please note in the product description that this device is ONLY for use with batteries that have a max voltage of 4.2V. (Don't keep your phone or laptop at 100%! Cycle it every day and let it "die" every once in a while). LiFePO4 doesn't mind sitting at full charge for long times, unlike other lithium chemistries which will degrade faster if they're not exercised and if they're kept at full charge. Glad I read that before plugging it in to those batteries.įor anyone who's curious about the differences in chemistry, you should use a LiFePO4 chemistry for use-cases where the device will mostly get power from elsewhere (like the wall) and the batteries will be sitting at full charge for long periods of time without being exercised. Unfortunately my project requires LiFePO4 which has a max voltage of 3.6V! There is no way to modify the output of this device to intercept the 4.2V and drop it down to 3.6V without making all the other features of the device basically pointless. See the example below for Nicla Vision, or check the full pinouts.I bought this along with some LiFePO4 batteries, only to discover upon closer reading of the datasheet that this device can only work with batteries whose chemistry lets them go up to 4.2V. If your battery has an NTC pin, connect it to the middle header pin (optional). GND connects to the header pin furthest from the USB connector. On both Nicla Sense ME And Nicla Vision, the positive terminal of the battery will connect to the header pin closest to the USB connector. You can use this connector by purchasing the ACHR-03V-S connector from an electronic reseller and attaching crimped battery wires with the crimp lock on the connector. See the JST ACH Connector datasheet for details. BM03B-ACHSS-GAN-TF), and is compatible with their ACHR-03V-S connector housing. The connector is a shrouded header from JST (model nr. The Nicla Sense ME and the Nicla Vision have a battery connector on the bottom of the board. The pin locations are identical for Nicla Sense ME. Warning: Do not connect two batteries at the same time.Ī battery can be connected to these header pins:īelow is an example for Nicla Vision. The Nicla Sense ME and the Nicla Vision can be powered with a single-cell 3.7 V Li-Po or Li-Ion battery.
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