constant current

I was tasked to build a constant current source for electrical stimulation, which can generate different pulses and up to 60-70 mA. And i achive it through using the Improved Howland current pump. Now I was asked to build a “true biphasic” output by using two Howland pumps across the same load...

I need to drive a 650nm cheap 5mW laser diode. It seems to have a current limiting resistor in series, but the laser still got damaged. I powered it directly from an 18650 at 4V and it was working fine. I left it on for an hour or so, but it was in a 3D-printed shell that I had made to position...

Hello, My name is Aiman. My focus research area is on Battery chargers. I would like to know the part for Constant Current charging. As i have done a sample circuit for the CC-CV battery charger system. I have conducted a few testing and simulation for the circuit but did not achieve CC-CV...

Hi, I created a low-ohm meter circuit similar to the one described here : https://www.allaboutcircuits.com/projects/build-your-own-low-resistance-meter/ for measuring the contact resistance on a Relay. However the relay's i'm checking have upto 16 contacts, so I created multiples of the...

Can an LT1085 be used as a constant current LED driver? There is no mention of it in anywhere in the datasheet, but since this is an LM317 replacement can I use it the same way?

Hello forum! I am a beginner in electronics and for a lighting project I bought a dimmable trafo and a touch dimmer with the hope to be able to combine these. The trafo is a MeanWell LDB-600L, that is a 600mA constant current trafo with a "DIM" input that takes either a PWM signal (100-1kHz)...

Hello. I am trying to make a pressure sensor using a CS040 sensor. The manufacturer sent me a complicated constant current circuit to power the sensor, but I wonder if there is a simpler way to power it. The sensor is piezoresistive. It outputs a voltage that varies with the pressure applied...

How can Lm2596 constant output current be limited ? How lm2596 cc cv module like in the picture control output current ?

LI charger chips are switching step-down converters with a constant-current mode. Say it's a single switch buck-type charger. It's input range is 5V to 10V, and is capable of charging cells at 2A. Will that chip require a 2A input regardless of Vin, whether 5V or 10V? Or, can the chip accept a...

Hi all, a driver circuit needed for lighting a 30W LED* (one color) - I had a look at the XL6005 datasheet and wanted to make sure I understand it properly based on the following diagram**: 1. To drive the LED with 300mA I should make RS = 0.73 ohm (ILed=0.22/0.73=0.3A) 2. To limit the max...