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Found 5 results

  1. Hi everyone. Can you help me with this circuit I am working on, please?. (Image 1) It consists of a TP4056 charger/controller connected to a 3.7v/1.4Ah Li-Ion battery to supply a low battery indicator and a load (3 leds + 2 fans) through a MT3608 Step Up to raise voltage from 3.7v to 9v. When the TP4056 is charging the battery through the USB port, the load is disconnected by the P-Mosfet. PROBLEM: Voltage drops significantly when the load is connected. Test1: Circuit without Debouncing/Load connected: Voltage drops from 3.68v to 3.46v (image 2). Low Battery Indicator: Blink
  2. Hi everyone, newbie here! Trying to find a power supply for LED backlight strips off of an LCD television. I've stripped it down but can't see it marked clearly anywhere. There are 2 strips with 6 LEDs on each. Printed on the light strips is the following: GJ-2k17 CSP-315 Pitch 109 (614x12) -v2.1 O1T38-1 RJ94V-0 E349376 HY-AI YK 1825 Attached are photos Cheers for any help!
  3. Hello, I am trying to modify an FM radio such that it blinks an LED according to the data I transmit from my FM transmitter. I am following the circuit attached below. Is it possible to connect LED to speaker terminals to obtain such result? or any other suggestions? Thanks
  4. I want to charge a LiPo battery via the ballance plugs. So it's a ballanced charge, and I don't run into any problems, day in and day out.The light can be very small, but I want it to be bright. So even using a couple LEDs would make a really nice and bright mailbox light.I want the light to last all night long. So that means I need to know the current draw of the LEDs to the capacity of the LiPo batteries.etc.I need help on this. I need help with the fact how to use an Op Amp to shut the light off when it's daylight out.. or a specific amount of light is sensed.Light Sensed : Start charging,
  5. How do I measure how many watt LED diode is on. Have some different that I do not know the value of.
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