Content for LM358

Thunderstorm Lightning Detector and Camera Trigger (or Droplet Detector)

“Ever wanted to capture lightning on photo? Maybe this camera trigger will help you make incredible images. Sorry, it will not help you with the composition of your photo, the sensor sensitivity, shutter speed, aperture or whitebalance settings of your …

DIY simple smartphone Metal Detector

“DIY sensitive VLF METAL DETECTOR with Smartphone This Metal Detector detects a small metal coin at 25 cm and pot lid at 1m distance This metal detector is capable of detecting small metal objects at great distances. For example, a …

Sound Sensor With Onboard Relay Arduino Nano Shield

“This sound sensor with Relay driver shield for Arduino Nano can be used to develop sound-activated ON/OFF switch or other projects that require sound senor. LM358 op-amp is used as the amplifier, 1st op-amp amplifies the microphone signal, and …

Use a Stepper Motor As a Rotary Encoder

“Rotary encoders are great for use in microcontroller projects as an input device but their performance is not very smooth and satisfactory. Also, having a lot of spare stepper motors around, I decided to give them a purpose. So if …

LED Volume Bar

“My workshop is too bland. Despite the varnished, 80s-Esque wood planks that cover my walls, it lacks both color and of course: LEDs. Likewise, I often play music while soldering electronics. This got me thinking, could I combine both music …

Temperature Controlled System With L293D

“The temperature sensitive controlled system is a device which controls and maintain the temperature of an object over a particular area related to the surroundings. These types of controlled systems are mainly used in ACs (Air Conditioners), Refrigerators, coolants, thermal …

Nixie Tube Audio Meter

“Nixie Tubes are an antiquated neon-based display technology dating back to the mid-1950s. They predate both LEDs and LCDs, which are both cheaper and simpler to operate. However, LEDs and LCDs both struggle to match the otherworldly aesthetic of these …

Raspberry Pi Controlled DC Load

“A DC Load is useful for testing lots of different things. If you have a power supply and want to make sure it’s able to deliver its fully designed potential, then you can use a DC Load to test …

DIY Active Load

“I wanted to test a pc power supply At first I was messing about with some big resistors but then I decided it would be nice to have an “active load” that you can set to a particular current. You …

Battery (Lithium, NiMH, NiCd) Capacity Tester Using Arduino

“The increased interest in IoT and electric automobiles around the world is driving an increase in the use of Lithium-Ion/Lithium-Polymer/NiCd/NiMH batteries as more devices and applications are using them, due to their high energy storage capacity to …