If ladyada's kit uses 4 LEDs to 2 AA battery's.
Could I modify the kit to use 8 LEDs like the SHP but only use 4AA Battery's?
Just wondering cause I'm trying to make the most powerful TV B Gone I can that can fit inside a cell phone.
I know that I can fit 8 LEDs I'm not sure on how much power I can fit though.
LED to Power Ratio Question
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I don't think a 9V is the best choice. If you'll notice, the SHP TV-B-Gone uses that, but it needs extra coin cells due to the high internal resistance from a 9V.
@RealRitz, remember, on Ladyada's kit, all of the voltage going to LEDs also goes through the Attiny85. It can only take up to 5V, that's why the two diodes were added to the EHP version, to keep that voltage to the microchip lower.
(I'm not used to being the one answering questions, I usually ask them, correct me if I'm wrong on this )
@RealRitz, remember, on Ladyada's kit, all of the voltage going to LEDs also goes through the Attiny85. It can only take up to 5V, that's why the two diodes were added to the EHP version, to keep that voltage to the microchip lower.
(I'm not used to being the one answering questions, I usually ask them, correct me if I'm wrong on this )
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well, i succesfully added four ir leds onto my tv b gone. It now uses 4 AA.
i made a little circut with four resistors, transistros, and ir leds. the resistors went from the transistors to one central point, with was soldered on the original tv b gone resistor (on the side near the ATTINY 85). the extra leds use their own two AA, and a ground wire had to connect the new boards ground with the original boards ground for it two work.
i used this schematic a quickly made for the add on board
i made a little circut with four resistors, transistros, and ir leds. the resistors went from the transistors to one central point, with was soldered on the original tv b gone resistor (on the side near the ATTINY 85). the extra leds use their own two AA, and a ground wire had to connect the new boards ground with the original boards ground for it two work.
i used this schematic a quickly made for the add on board
Please be positive and constructive with your questions and comments.