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I only realized I bought the wrong thing because when I hooked it up to power my breadboard, I was getting 4 volts when I was expecting 5 for my attiny. Is there w way I can salvage my negative resistors to steadily output 5v? Sign up using Email and Password. Very much the last choice you should make. I am assembling a metal detector kit of parts. In some cases, such as with a battery, you can simply reverse the connections to get a negative voltage.
Batteries could be smaller fewer cells and last longer. I may not comprehend the idea of negative voltage. Thanks for your replies! Home Datasheer Tags Users Unanswered. Step one operates the 79L05 completely unloaded, which can cause Discussion has been re-started by post 7. If with a 1mA load 5k resistor the voltage drops to -5V, your chip is OK. Pin 1 is datasheer positive voltage 0V on a 79xx and input voltage on a 78xx Pin 2 is most negative voltage 0V on a 78xx and input voltage on a 79xx.
Sign up using Facebook. Email Required, but never shown. Have at it with that one. Is it as simple as reversing the polarity? Docedison Faraday Member Posts: Actually the pin out for both catasheet and 79 devices is easy to remember.
Andy aka k 10 Sign up or log in Sign up using Google. Under certain circumstances it Might work but there will always be those reversed polarity issued there.
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