AR glasses

AR glasses

An Arduino based LED Tester with LCD. Select the current and the destination voltage (your battery), connect the LED to the tester and get the needed value for a serial connected Resistor. You can also see the measured values for the LED (forward voltage and current). Based on the idea of https://jaycar.com.au

An Arduino based LED Tester with LCD. Select the current and the destination voltage (your battery), connect the LED to the tester and get the needed value for a serial connected Resistor. You can also see the measured values for the LED (forward voltage and current). Based on the idea of https://jaycar.com.au

Controller for my IV-25 Display Module

Controller for my IV-25 Display Module

This post shows how to design and build a compact modified sine wave inverter that has all the necessary safety features to ensure stable and long operation. Because the inverter is software controlled, many other functions and voltage inputs can be enabled. One unique thing about this inverter is that it contains a tap changer, which makes it possible to switch taps to suit different input and output voltages, such as an inverter with a selectable output voltage of 110 or 220V.

This post shows how to design and build a compact modified sine wave inverter that has all the necessary safety features to ensure stable and long operation. Because the inverter is software controlled, many other functions and voltage inputs can be enabled. One unique thing about this inverter is that it contains a tap changer, which makes it possible to switch taps to suit different input and output voltages, such as an inverter with a selectable output voltage of 110 or 220V.

Stand-alone Oscillator Calibrator and High-Voltage Fuse Resetter for 8-Pin ATtinys

Stand-alone Oscillator Calibrator and High-Voltage Fuse Resetter for 8-Pin ATtinys

USB Phone Charge Guard controls and monitors charging of phones and other devices in order to extend battery life

USB Phone Charge Guard controls and monitors charging of phones and other devices in order to extend battery life

Simple Tachometer (RPM-Meter)

Simple Tachometer (RPM-Meter)

Single-Cell Li-ion Battery Charger with selectable Current Limit and OLED Display

Single-Cell Li-ion Battery Charger with selectable Current Limit and OLED Display

Control almost any number of NeoPixels with an IR Remote

Control almost any number of NeoPixels with an IR Remote

ESP32 based weather station - does NOT include the solar-powered part of the solution - which is done with the help of another board.

ESP32 based weather station - does NOT include the solar-powered part of the solution - which is done with the help of another board.

Breadboard friendly dev board for ATmega328P-PU

Breadboard friendly dev board for ATmega328P-PU

T12 Quick Heating Soldering Station based on ATmega328P

T12 Quick Heating Soldering Station based on ATmega328P

Programmable Electronic Constant Current Dummy Load with USB Interface

Programmable Electronic Constant Current Dummy Load with USB Interface

Simple 5V/2.5A Uninterruptible Power Supply (UPS) for RaspberryPi and other Devices

Simple 5V/2.5A Uninterruptible Power Supply (UPS) for RaspberryPi and other Devices

Simple USB Power Tester with OLED Display

Simple USB Power Tester with OLED Display

Water level sensor

Water level sensor

Rotary Encoder with USB Interface for Volume Control of the PC or for other Applications

Rotary Encoder with USB Interface for Volume Control of the PC or for other Applications

FM Radio with RDS, Audio Amplifier, Rotary Encoder and OLED Display

FM Radio with RDS, Audio Amplifier, Rotary Encoder and OLED Display

ATtiny-controlled and LiPo Battery-powered MP3-Player using the DFPlayerMini Module

ATtiny-controlled and LiPo Battery-powered MP3-Player using the DFPlayerMini Module

S2 Tiny Breadboard friendly minimal dev board for ESP32-S2 Wrover or Wroom

S2 Tiny Breadboard friendly minimal dev board for ESP32-S2 Wrover or Wroom

IR Remote Control based on ATtiny13A

IR Remote Control based on ATtiny13A

Stand-alone High-Voltage Serial Programmer and Fuse Resetter for 8-Pin ATtinys

Stand-alone High-Voltage Serial Programmer and Fuse Resetter for 8-Pin ATtinys

Tiny handheld gaming device based on ATtiny85

Tiny handheld gaming device based on ATtiny85

Simple T12 Quick Heating Soldering Station based on the ATtiny13A

Simple T12 Quick Heating Soldering Station based on the ATtiny13A

3.3V CH330N/CH340N-based USB to Serial Converter.

3.3V CH330N/CH340N-based USB to Serial Converter.