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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
if you dont want to connect battery, you should connect the +4.1Vdc to VBAT pin
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.
That comparator does appear to have a push-pull output. You need a new plan. ;-) You can't connect the comparator common to the ground that you are disconnecting from the battery negative terminal. If you want the battery to power the comparators then you need to connect pin 4 directly to the negative terminal of the battery.
Your schematic does not show a battery and does not show a battery charger circuit. A 555 is supposed to have a supply bypass capacitor. A 555 is not supposed to have a zener diode at its pin 2 or at its pin 6. Why is your electricity 155VAC? Then the transformer output is 155/7= 22VAC which has a peak voltage of 31V (...)
When combining cells, the degree of mismatched ESR and SoC affects reliability. For serial, voltage sensing on charger per cell is needed, which is why they have 3 pin on multi cell batt's. Serial, doubles ESR and ESR rises rapidly when any cell approaches 10% SoC so reverse protection is often used or better, cell equalization FETs. For parallel
Looks like a schematic error to me, or something else is there but missing in the diagram. The battery charges as explained by Yosmany325 but the transistor never conducts. Either something else is connected to it's base pin or Q1 is both the wrong polarity and has it's collector and emitter reversed. Note that the link you gave to the 2N5401 do
can i operate sim908 module by giving 5v to VCHG pin without using any battery on VBAT pin ?
Hii . I want to design smps based battery charger, that can charge the battery at constant current 1amp (adjustable) with 14.1volts(adjustable) and after full charge it gives the constant voltage 13.6volts to the battery... My battery specifications is 12v 7.2ah sla battery So how to proceed?
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=
With a 9V supply (a 9V battery drops to 6V over its life) the pin 3 output of a 555 goes only to +7.6V which is not enough voltage for the 12V relay coil.
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