This schematic has a few functions to this circuit. This circuit takes voltages starting from 4V to a max. of 13V. It was an open source project I found online. I've redone this board's schematic. But when it came to de PCB design I kinda lost it. I got as close to sorting the components on the board, but I didn't know where to start connecting wires or how. I'm taking a little break, but if anyon...
LiPo battery charger and 5V booster based on the IP5306.
- switch-mode charging with up to 2.1A / 91% efficiency
- discharging with up to 2.4A
- boost converter with up to 92% efficiency
Solar powered switch-mode charger (CN3801), protector (HY2112) and 5V booster (MT3608) for LiFePO4 batteries.
The charger provides maximum power point tracking (MPPT) and can easily be modified to work with LiPo batteries.
Compact speedometer with OLED display and temperature measurement.
It features an ATtiny85 uC with USB programming and battery charging and protection circuitry. I will be using it to measure the speed of my bicycle and determine the temperature around me on my rides.
The project consists of 2 pcbs: the sensor that will be mounted on the wheel of my bike and the actual speedometer.
Card based to ESP32 Wroom 32D
Micro USB Interface Power & Serial
2.2 Inch ( 240x230 ) Color LCD Screen
Micro SD Card Reader ( SPI )
3.7v LiPo Battery Port
Real Time Clock ( I2C )
Selection button x 4 ( I2C over I2C GPIO Extender)
External Reset Port ( SWITCH )
External Analogic Input X 2
External Optocoupled Digital Input X 4
External Optocoupled Digital Output X 4
External I2c Port...