All Questions
25
questions
0
votes
1
answer
73
views
What is the purpose of N channel MOSFET in this schematic?
I have a developement board and I have found the schematic of it. However, When I skim through schematic, I came across this charger and boost circut but I couldnt figure out what is the purpose of N ...
- 73
0
votes
1
answer
163
views
Powering a dc brushless motor with lipo battery
I am trying to control a brushless dc motor. I have a H-bridge style MOSFET circuit and am controlling the gates with an Arduino. However I am trying to power the motor with a 7.4 V lipo battery (...
- 11
2
votes
1
answer
172
views
Quiescent current in battery circuit
In this circuit I'm using an MCP73832 for battery charging and an AP2210 LDO. The mosfet is a DMP3099L. With the USB disconnected, VBAT set to 4.2V and the MCU (STM32F030F4P6) in standby mode (drawing ...
- 427
0
votes
1
answer
900
views
Can I use this MOSFET instead of the standard FS8205?
In my current circuit, I have the FS8205 MOSFET in combination with a DW01A for lithium battery protection, but the MOSFET is out of stock. I found another MOSFET labeled "FS8205A". Can I ...
- 107
1
vote
1
answer
434
views
How to separately charge two LiPo batteries wired in serial?
I would like a circuit where 1) two protected LiPo batteries are wired in serial to power the load; and 2) when external power is plugged in the load is disconnected and the batteries are charged ...
- 113
9
votes
1
answer
2k
views
Is this MOSFET upside down?
I'm looking at existing circuits and trying to understand them so I can design my own. Also to improve my electronics knowledge, for some reason MOSFETs have never quite sunk in for me.
I came across ...
- 166
1
vote
1
answer
343
views
My LED driver keeps blowing up when connected to a Lipo battery
I bought this LED driver for my Cree XHP70.2 LED
The driver specs are:
Input voltage: DC7V~15V
Output voltage:DC6V
Current: 4-4.5A
Single mode full power
I connected the driver to a power generator ...
- 15
0
votes
0
answers
31
views
Automatically switch charging lead to highest available connection in a variable series of batteries
I have a circuit which I use to charge LiPo batteries with a balanced charger. The idea was that I want to charge up to three 2S batteries as one 6S battery without the problems related to simple ...
- 101
0
votes
0
answers
503
views
ESP32 MOSFET Control with a Twist
Looking for some help with using an ESP32 (running Arduino IDE) to control a MOSFET. Currently, I have used the combo to control many things successfully by electronically "pressing buttons" by ...
- 23
0
votes
0
answers
251
views
Lipo Charging Circuit- Relay vs MOSFET
I am currently working on an application which will use both a Lipo and an external power source (DC). The external power source will charge the lipo as well as power the system load at the same time (...
- 41
2
votes
2
answers
1k
views
Solar panel as day/night switch for a load
I'm using off-the-shelf components to power a buck/boost LED driver and charge a battery from a 6V solar panel.
To power the LED driver from the battery at dusk only, would I have to use a MOSFET ...
- 228
3
votes
1
answer
664
views
PWM as a voltage regulator for 12V wiper motors and 14.8V LiPo
I'm using 12V (~40W) car wipers motors for small robotic project. Motors are driven over MOSFET H-bridge (IRF1405/IRF4905) with PWM speed/power regulation. Currently a voltage source for motors is a ...
- 31
1
vote
2
answers
1k
views
Selecting a logic level MOSFET compatible with 3.7V power source
Continuation of prior question: Logic level mosfet to switch on 3.7v battery
I am a 'mature' entrepeneur Arduino level electronics noob, apologies. Want to build a flashing alert using 3W LEDs in ...
- 11
0
votes
2
answers
4k
views
Single cell Li-Ion battery - cascaded double protection?
I have an application where I have a battery protection circuit (overcharge, overdischarge, charge overcurrent, discharge overcurrent) containing BQ29700 on the main board separate from the raw ...
- 157
0
votes
1
answer
516
views
Lipo battery protection circuit. Is this a good approach?
I want to build a circuit for a quadcopter where MOSFETs are connected to the primary and secondary battery. When the voltage falls below certain value in the primary battery the voltage monitor ...
- 31