Being a technical author and circuit designer, I realise that my junk box is helpful for making things by supplying discrete components that are otherwise hard to get currently. While looking through ...

I wondered if the subcircuit consisting of the LM317 and resistors Rs and Rc could form the basis for such a circuit if it were driven from a suitable control current. In Figure 1, the first step to ...

We design with the D2Pack regulator when a circuit uses more than 400mA of current. D2Pack is a surface-mount version of TO-220 that’s easy to solder. Footprints for all LM317 packages are ...

Contributing editor, Bob Pease, explains how to design several different circuits for limiting currents as high as 300 mA using an LM317, LM334N, IRF640 or IRF740. The other day I was studying a ...

Set an LM317 circuit up to output 10mA, say, and you can safely test out about any LED. Read off the operating voltage, subtract that from the supply voltage, and then divide by your desired ...

That seems pretty good for something like a laser diode. Yep. I've built several LM317 based drivers for my lasers over the years. I've only used them on lower powered builds though. Seems ...

Many electronics circuits begin operation at voltages below 1.25 V. But popular adjustable regulators such as the LM317, LM350, and LM338 can provide output voltages only above 1.25 V, and the ...