In this post I have explained a simple LM317 IC based RGB 3 watt LED color mixer circuit, which can be used for demonstrating the color mixing effects of red, blue, green colors as specified in the standard color charts. The idea was requested by Mr.Praveen. Technical Specifications My name is Pravin, I work in […]
LM317
LM317 with Outboard Current Boost Circuit
The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to upgrade the regulator circuit to handle much higher currents, and upto any desired levels. You might have already come across the 78XX fixed voltage regulator […]
How to Modify 78XX, LM323, LM350, LM317 Voltage Regulator Circuits
In this article I have explained many different methods of modifying voltage regulators ICs to improve their voltage and current handling characteristics. We learn how to externally modify these regulators using transistors and ICs for upgrading their current and power handling capacities. We discuss how to modify 78XX ICs, LM317 ICs, LM350 ICs, and LM323 […]
LM317 IC Tester Circuit – Sort Out Good ICs from Faulty Ones
Here is simple but handy testing circuit for LM317 adjustable voltage regulator IC. I am sure it can be used to test other similar ICs like LM117, LM158, LM358 etc. The circuit is pretty straightforward. The circuit is based on normal configuration of adjustable voltage regulator. How it Works For details follow https://www.homemade-circuits.com/2011/12/how-to-build-simplest-variable-power.html A DPDT […]