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Step 9Schemmy, using a 9V battery! And a gratuitous kitty photo :)
Pic 1: Just add an on/off switch to the battery, and this programmer is good to go. If your circuit draws more power than the wimpy battery can handle, add a different power supply between 9 and 12.5V (check if with a multimeter! 12V unregulated usually means 18-20V under low draw - and will kill yor pic). If your nearest wall wart gives more than 12.5V, then you will have to add another voltage regulator.
OR you could leave the 9V battery connected to the pnp transistor, but disconnect it from the 7805. Then insert your external power source, less than 35V, to the 7805. Well, now that you understand how the programmer works (ya do, right?), you can modify it any way you like from here. Adding some indicator LEDs might be nice?
Pic 2: Smurfy. Shhhh, she's sleeping.
OR you could leave the 9V battery connected to the pnp transistor, but disconnect it from the 7805. Then insert your external power source, less than 35V, to the 7805. Well, now that you understand how the programmer works (ya do, right?), you can modify it any way you like from here. Adding some indicator LEDs might be nice?
Pic 2: Smurfy. Shhhh, she's sleeping.
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Feb 2, 2010. 10:24 AMsuperbird
says:
The Project is great but the cat is the best!!
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Jun 12, 2009. 10:10 AMsventeeuwen
says:
smurfy is so cute!!!
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Jun 26, 2009. 11:55 PMklee27x (author)
says:
... Hehe, yeah. This was an awesome picture. She fell asleep in my hand and I carried her around until she woke up. :) She had a litter and gained a few bazillion pounds since then, though. :)
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