Activity for Stefan‭

Type	On...	Excerpt	Status	Date
Question	—	Power amplifier for remote controller I'm designing remote controller based on NRF24L01 and STM32. I want to use SMA antenna. My question is regarding power amplifier (PA). When is it necessary to use one? The range I'm aiming for is 20+ meters. Every commercially available module with NRF24 and SMA antenna has PA, but I would like to sa... (more)	—	over 1 year ago
Answer	—	A: Battery protection circuit This is the circuit I have decided to use: Schematics The cut-off voltage will be just above 6 V. MOSFETs used are SiRA14BDP and the voltage supervisor is TS831. Maximum current consumption of TS831 is just 12 uA. For the voltage on one cell to hit dangerous level it needs to drop from 3 V t... (more)	—	almost 2 years ago
Question	—	Battery protection circuit I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit. Since n-channel MOSFETs will be used for the H-bridg... (more)	—	almost 2 years ago
Question	—	Limiting current to DC brushed motor This question is related to my previous question. I want to drive a brushed DC motor using H-bridge. To power the motor two 18650 cells will be used in series. The issue is that I want to limit the current to 10 A (to prolong the battery life span, lower power dissipation on MOSFETs, etc). Is th... (more)	—	almost 2 years ago
Question	—	H-Bridge components and calculations My goal is to make an RC car, and I have a couple of questions regarding driving the brushed DC motor. Schematic for half of my H-bridge looks like this for now (it will be identical on the other side): Half of H-Bridge I am trying to make a H-Bridge circuit to drive a brushed DC motor (MotorData... (more)	—	almost 2 years ago