**555 timer based PWM LED dimmer**
This project uses PWM to turn on and off a LED (or a strip of them) really fast and changes the duty cycle (Fig.1) so that the human brain perceive it as the dimming of the LED(s). This means that the MOSFET doesn’t have to drop large amount of voltage, this makes the device very energy efficient.
MOSFET acts like a diode to protect against reverse polarity but with lower voltage drop.
The figures below are for the P-FET design. N-FET design will be similar except with minus signs instead.
1. The absolute maximum Vds should be at least -2Vbat, where Vbat is the voltage of the power supply/battery.
This is because in a situation when correct polarity rapidly switches to...
Input voltage 13.5-36V
DC Motor controller 20A continuously
Constant voltage or RPM
Adjustable current limit
Opto Interrupter for RPM sensing
ATmega328P PID controller for constant RPM
LED driver 14-26V, 350mA, dimmable
OLED display and rotary encoder (https://easyeda.com/sascha23095123423/dc-motor-controller-panel)
# PTC Heating Element Control
In this design we used precise temperature and humidity sensor from Sensirion: SHT30 or SHT31 connected via I2C. Sensors are equipped with ALERT output. This output is connected to N-channel MOSFET and controls PTC Heating Element. Huge advantage of this design is ALERT logic which can be programmed via I2C and it's independent from main micro controller. In other wo...
This is a IR2110 high side mosfet driver circuit with mosfet included. This is a circuit I use often and I believe it is time to give it its own board and project.
[High side mosfet driving using the IR2110](https://krakkus.com/high-side-mosfet-driving-using-the-ir2110/)
Esquema eletrônico do extensor de corrente para ser usado no hotbed ou hotend. Montei, testei e está funcionando muito bem.
Para quem se aventurar a projetar a PCB, leve em conta que estamos tratando com correntes eletricas altas, então cuide de adotar trilhas grossas para fonte e a carga.