In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Jim,
  The LM2940 might handle 26 volts, but not at it's maximum current (1 Amp). 
  That would be (26-5) = 21 Watts of heat !!!
  At 9 volts it would be (9-5) = 4 Watts of heat, alot but probably okay with a heatsink.

Bean.

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