Output pin voltage
Hello! I'm working on a Picaxe 28x1. I can't find in documentation what is supposed to be the voltage of the output pins.
I've used a tester to check and it's very low, about 1, 1.5 Volts. Is it normal that it's so low ? Is that enought to use with a transistor?
Thanks :)
@ Mon, 2008-05-19 19:49
Hey, See what Mr "psy" has
Hey, See what Mr "psy" has made here:
http://letsmakerobots.com/node/662
You may want to read that!
/ Fritsl
@ Mon, 2008-05-19 17:03
"F" goes through the
"F" goes through the Darlington. It is sort of an amplifier. There are many issues in your different questions :)
So.. to put it short; If you want to connect to TTL, you should use the "E"-row, not the "F".
/ Fritsl
@ Mon, 2008-05-19 11:16
i'm feeding the picaxe with
i'm feeding the picaxe with 4.8V (4*1.2 rechargeable AA battery). I'm also using an L293D IC, can it be the cause? I've read it causes a voltage drop, but that much ?
What should the right value be, anyway?
Thanks :)
@ Mon, 2008-05-19 13:44
Well it all depends on what
Well it all depends on what / where you are measuring :)
The Chip sends out TTL-level - which is 0-5V (if it is fed 5V - but then there is the darlington, and the motor driver.. I am not quite sure what you are measuring..?
/ Fritsl
@ Mon, 2008-05-19 13:56
thanks fritsl :)I'm
thanks fritsl :)
I'm measuring the difference between an output pin in the board (the block marked F in this image) and the ground.
If a device says "connect with TTL level" can i connect with my weak 1,5 V output ?
Btw, what is the Darlington needed for?
@ Mon, 2008-05-19 11:03
How much are you feeding
How much are you feeding it?
/ Fritsl