Hey all.
Calculon has a question about the uln2803 darlington driver. He has a datasheet that says "the darlington pairs may be connected in paralell for more current-carrying capacity." Calculon wonders how this is done?
Would that be pair of darlington pairs? And if he wanted more current capacity than that, what transistors would he use to make his own d-pair?
Calculon thanks you.
manuals
picaxe manual 3 page 6. i wont post a link because i use safari 
oops
Calculon is embarrased.
Thx MintVlt
talking in the 3rd person now???
lmao… whatever makes you happy man… 
no problem
minty is glad to point calculon in the right direction
I thought it was his inner
I thought it was his inner monologue expressing itself…
Darlington driver switching different voltages??
does anyone know if the ic can switch a lower voltage than the
V+ input voltage ?
ie; if i use 12v into the ic pin 9 and i use picaxe to switch 12v motors
can i connect a 6v relay between the other out pins and a 6v supply
seperate to the ic voltage?
I’m refering to the picaxe manual 3 diagram.
I have 12v motors an 6v relays… what a pita.
The common, pin 10, of the
The common, pin 10, of the ULN2803 must be connected to the supply voltage, either 6 volts or 12 volts. It cannot be connected to both.
Add another ULN2803 for 6 volt use, or add some transistors to run either one device or another.
edit : in another post, others think it will work. Having not tried it myself, perhaps it might. I’d expect the 6 volt relay coils to see overvoltage during switching though.
