Designing a DIY Precision Milliohmmeter Circuit
Let’s design a milliohmmeter circuit to measure low resistance values. It allows us to learn about basic electronics by designing circuit. Read more
LM317
LM317 is the number one very old IC. Therefore it is often seen in the market. Since it is easy to use and very cheap, we have collected it. Because you may receive good ideas from these circuits. For example: LM317 Power supply
Experimenting with LM317 as power switch controller
Learn how LM317 can be a power switch controller instead of a transistor. Try a simple power pulse generator circuit.
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Gel cell battery charger circuit
It can charge any size of the Gel cell batteries and extend the life of the Gel Cell battery. While the circuit is running, the LED indicates charging. Read more
USB 5V to 1.5V/ 3V Step Down Converter Circuit
See USB 5V to 1.5V/3V Step Down Converter Circuit using LM317. With this, we can use MP3 players (requires only 1.5V AA battery) with USB(5V). Read more
Ni-MH battery charger using LM317T
Here is Universal nicd and nimh battery charger circuit. It use IC LM317T ( Hot IC) Control Current less 300mA, Size battery 2.4V,4.8V,9.6V. Low cost circuit Read more