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Recent content by rad20

  1. R

    +12V from +60VDC? How to Do it?

    You may find examples of LM317 being used as switching regulator in the datasheet here **broken link removed**. Go to page 9 of the doc, 2 examples given.
  2. R

    +12V from +60VDC? How to Do it?

    Hi Picstudent, Can you get the HV version of LM317 (LM317HV)? It can be configured as switching regulator as shown in the datasheet. Also, the bonus in the app example is higher current handling capability with external driving element.
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    Transistor for Flourescent Ballast

    thinlt r9024 Hi Kip, Firstly I suggest you try to find out the transistor type NPN or PNP. Hopefully on one of the unit you have you can still find a good junction (BE or BC) on the transistor. Once you have determine the type then selection for substitute becomes easier. At home I opened up a...
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    12v to 220v inverter circuit diagram

    inverter circuit diagrams Hi, Has anyone constructed this and measured what is the efficiency of the inverter? Thanks, rad20
  5. R

    LED as its own temperature sensor

    temperature measurement +forward voltage +led Hi Kender, I think you are trying to use an LED as a stable light source for monitoring the state of some equipments. Yes, it may work by the method you mentioned. However you have to ensure the environmental temperature is also controlled over time...
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    Nokia battery charging

    Another is to use the simple standalone universal phone charger. The good part is that the contacts are adjustable to fit your type of battery. I think you should be able to find it in places like ebay. Here's an example:
  7. R

    BL233: PC to SPI/ I2C Adaptor

    bl233 pic I evaluated it before but never actually use it. It seems easy to use esp. customizing it to your application, I use RS232 interface to the chip. It's actually a PIC under the label.
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    Charging Algorithm for Sealed Lead Acid Battery

    Here's another source for SLA charging algorithm. **broken link removed**
  9. R

    example program for pic16f84a and rs232 interface

    pic16f84a examples I use this terminal program, much better than hyperterminal..also free. **broken link removed**
  10. R

    How to interface 16bit DAC board using PIC18F452?

    PIC18F452 to 16bit DAC Hi, I have a board with 16bit DAC (BB DAC71-CSB-V) that I want to interface using PIC18F452. How do I output a two's complement 16bit command to the IO? Pls help. Thx

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