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118 Threads found on Battery Pin
I have a transformer of an old UPS Implying it steps up 12V (24V) to mains ACV. A clever designer might (for all we know) install more windings to step down mains AC to charge the battery pack. It will require a lot of testing, if you wish to figure out step up/down ratios, etc. Take ohm readings. Make a list of all
I m using STM8L micro controller. This micro controller is powered by 2.4V rechargeable battery. When i tried to monitor the battery voltage using ADC pin the ADC value remains unchanged due to VCC of the Micro controller is same as ADC input. How can i solve this issue.
in theory everything is fine. in practice there are parasite elements. Assume you have long wires, dirt contact etc. and there is serial resistance. For calculation assume 1 ohm, with standby current it is 30mV volt drop, while in transmission stage (for instance initialisation) with 1A current it is 1V drop. It takes a few ms, but it is enough to
I put this circuit together that charges the 3.7V Lipo battery and also produces 3.3v at the output . An LED indicates the charging status . I am getting 3.3v output but the LED is not lighting up and the status pin is showing zero volts . is the charging part of the circuit correct ? 128720
HI all, I need to control the Chip Enable (CE) pin for trun ON/OFF the charging application based on the voltage on there any current limitation to this CE pin, am thinking to pull up by 10K for enable disable sinking through bc547. Is it ok, Kindly give me suggestion.
Hi all, I need a small help regarding L293D. I am making a small project using L293D. Bo motor which hardly consumes 60ma at 5v. i am powering my L293D using a step up circuit 3.7V to 5V from 3.7v li-ion battery. output current from step up circuit is 200ma which is not a issue. my problem is the motor voltage pin no 8 shows me 5.12v. when i d
Hello all, i have one issue in sim808 module. 1) when i connect VBUS pin to the +4.1Vdc and connect battery to the VBAT pin sim808goes in power down mode when i disconnect it external battery. 2) When i connect VBUS pin from +5V dc continuous supply(charger) and connect battery to (...)
the ground of AC supply is different (from 12v ground). therefore no glow of bulb with battery + and ac ground pin. and bulb glows in 12v and its gnd(-) point. the term 'ground' is to be used with its own circuit.
I put together this battery disconnect circuit and it's not working as planned. The datasheet does not state if the output of U1 is Push-Pull or open Drain, I assumed it was push-pull. Idea was that if there is no charge voltage AND the battery dropped below 11Vdc, Q1 isolates the battery. pin 1, 7 don't go much (...)
Hi Friends.. I am doing the project of Charging circuit with Auto cutoff. The charging circuit designed from AC-DC converter. The problem is while the battery is charging sometime the relay tripping ON & OFF state.When i try to measure the voltage across the battery, whenever i touch the battery terminal with my multi (...)
Hi! I want to use an IC for battery Management System like bq76PL536(Texas Instrument product). I have to control 4s8p (4 series*8 parallel) cells.. It's something like this: 117217 I'm aware that these kinds of ICs are designed for series cells. But my question: is it practical and possible to control x*8 cells with one
117137 This is a solar energy charger and have a PNP 2N5401 transistor can anyone explain to me about how this circuit can work ? and the LED can light up when battery is implement.
can i operate sim908 module by giving 5v to VCHG pin without using any battery on VBAT pin ?
Without a MCU it's a little bit complicated (complex schematic) to do this. The circuit above just limit the output voltage at a V_SET level (14.1V, by example) and the output current at a I_SET level (1 .. 15A) simultaneously. Lead acid batteries have a dynamically changed internal resistance. If you limit the charging voltage to 14.1V, the char
where do I put the +/- ? You correctly put +9V on pin 8 but you wrongly put 0V on pin 4 instead of a second battery that is -9V.
Hi Thank you for the reply Pulsetronics. I have difficulty understanding the battery charging operation with a 3 Stage battery Charger. For charging a 12V battery, referring to the image 113429 In Absorption stage or Constant Voltage Stage "the charger controller" maintains a voltage of 14.5V In Float Stage the output
Hello everyone, my laptop went totally dead and the battery is not charging. My power adapter works fine and i am getting 19V input on MB. Motherboard is DK10FG-6050A2509901-MB-A02 I replaced Q6010, Q6011 and Q6012, but i had no changes. Schematics (Power circuit is at page 5): 109984 Measurements on U6000: [ATTACH=
i got problem using ic555 with relay. my connection of the circuit is as: pin 1: direct to negative pin2: direct to 6, capacitor 1 (100uF) to negative, resistor 2(22K ohms) to pin 7 pin3: relayto negative pin4: direct to positive pin5: 0.01 uF capacitor to negative (...)
105971 1)How did IC1 generate 24V from 3.6V DC battery?? 2)C1 is voltage filter but what's the purpose of L1, a filter for what? 3)what's the use of D1, schottky diode here?
dear all I have two question 1. what happen if i will use 47uf16v elco. capacitor in place of 47uf10v ,Is it effect remote battery life? 2. Is dual color SMD led's come in two pin Regards