The LM78LXX series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications . LM78L05 ELECTRICAL CHARACTERISTICS. (VI = 10V, IO = 40mA, 0°C ≤ TJ ≤ °C, CI = µF, CO = µF, unless otherwise specified. (Note 1). Part Number: LM78L05, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor.

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Yaro Full Member Posts: This is the scheme: But I have doubts. I’ve checked pins on datasheet and they are the same on the sketch, but what is the right way of the piece? D I’ve connected it, with the flat face front on me, like in the sketch.

LM78L05 Datasheet

But when I measure the voltage between the two outputs O I note 10v, it’s right? What is the explanation? If it is right so I can power arduino mini 3v3 with the two outputs of the voltage regulators or do I need to use the output of LM78L05 and the gnd of LM79L First off you need capacitors from input to ground on both regulators.


You don’t need -5V for the mini. A single LM should do the trick.

However you might be better off with two or three x 1. Then you don’t need the voltage regulator and they will last longer. Especially if you read up on using sleep mode.

Please post technical questions on the forum, not by personal message. It always takes longer than you expect, even when you take into account Hofstadter’s Law. You don’t need the -5V supply at all.

The INA will work down to 2. So ditch the 79L05 and connect pin 4 of the INA to ground instead. See Fig 5 on the dattasheet.

Formal verification of safety-critical software, software development, and electronic design and prototyping.

SK 78L05 – PDF Datasheet – Linear Voltage Regulators In Stock |

Please do not ask for unpaid help via PM, use the forum. To answer my own question, the schematics for both versions of the wave shield are found here, click on downloads.


So, the SD Card apparently has more stringent requirements for driving. I don’t know the dafasheet for an SD card.

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