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.
Water detector with 4 level stages. Each stage makes the 555 timer to give a supply period for the buzzer. The active buzzer transmits sound with a pause period between 0.5-3 seconds, depending on the level detected.
WARNING Overvoltage-Reverse voltage protection with PTC and diode, Overcurrent Protection with PTC U2-U3.
Overdischarge protection with microcontoller.
Wrong setting may cause Injury or Overheating.
Overheating + Battery = Acidic gas + Fire + Expolosion. Only for indoor and well ventilated areas.
Produce at your Own Risk
12 to 15 volt step up converter,12V lead acid battery charger, output voltag...
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.
The attached circuit is a 12V to 24V battery charger, originally designed for charging a 24V mobility scooter from a car 12V outlet. It has boost charge and trickle charge control, and can deliver upto 3A. It can be modified to deliver higher current by upgrading the MOSFET.
The PCB is designed to fit an Evatron REAS80 Extruded Aluminium Enclosure 80x64x30mm (Order Code: 30-3555 www.rapidonline.c...
Schematics & PCB for battery spot welder controller board.
- Provides simple user interface
- Accepts pedal input ( with smart unintended-weld protection )
- Outputs precisely timed pulses for [high current relay](https://www.banggood.com/custlink/KGDDEpKHCE)
- Very simple to solder, generous spacing and no SMD components
- Easy to remove DIP8 components ( MCU & DRIVER ) thanks to the space below...
A Mini weather station based on ESP-12. Include a BME280 or BME680 sensor chip on board, one or more DS18B20 onewire sensors. It's powered by a Lithium cell, can be for short time directly charged over present voltage input. A LDO with very low Iq included. Comes with voltage measurement for the connected battery. Hardware jumper for deep-sleep and a programming connector (charge the battery if +5...