Here are some DIY LDR switch circuits available on our website and the web. LDR switches are used to switch a relay or other device when light are present or absent. LDRs or Light Dependent Resistors ...

In this three part video series we watch [Dirk Herrendoerfer] go from scraps to a nice 3D printed assembly as he iterates through the design of a pen plotter for making circuit boards. [dana] menti… ...

Build a DIY Lead Acid Battery Charger Circuit. Posted: February 1, 2025 | Last updated: March 8, 2025. Learn how to build your own auto cut-off lead acid battery charger circuit for a 12V system.

Here’s something for the inner romantics and DIY circuit board assemblers in all of us. Yes, I’m talking to you, my friend; soldering iron in one hand, PCB board in the other, pining to tell ...

The robot can listen and use AI models to formulate responses. It turns speech into text, sends it to ChatGPT, the local ...

From the bargain bare-bones Raspberry Pi computer to the open source Arduino microcontroller, there are a growing number of advanced components for hardware hobbyists. But, until now, circuit ...