RF and Sharps not playing together?

Community General Discussions
21

Cool, LMR is more like old

Cool, LMR is more like old times now :smiley: Focus, engagement, silly fights and 1.001 ideas and stuff :smiley:

For the record if I ever sound mean or insulted, itā€™s all just cultural differences and fun!

22

I just read half of all that once again
And now I am wondering exactly the same thingā€¦

23

Crappy input/out put

Hello CTC,

excellent, it is usually better to sep. the logic and drive power. And your using the big 7805 which is cool a good AMP; now what is the logic supply voltage (i.e bat) 7805ā€™s like a couple of Volts in hand (i.e. 7ish volts in) otherwise you can drop out of regulation when there is a little bit of a draw on.

When I talk PC CRO I am talking about the Audio Port approach which has been talked about.

If you can use the Poor Mans PC CRO to look at the ground and power rails for me (both sides of the 7805) with the Sharps in and out, also trace on the sharp pin (the one going to the micro.

This is a solvable problem, it will have a root cause, just need to exclude all of the possiblities!

all the best

24

Sharp is IR is Sharp is Phototransistor :smiley:

Quote: "Fritls stated above it is the IR LED spiking the power supply, however looking at the datasheet the IR LEDā€™s are not switched, so I donā€™t think it is the IR LEDā€™s however the Phototransistor could be to blame."

Oh my long don Johnson!

You are right, of course :slight_smile: Only, the whole Sharp is just getting one supply. And the whole sharp is refered to as an IR distance-thingey - so I just refoer to it as ā€œthe IR isā€¦ā€ Not what individual parts in it that areā€¦ :slight_smile:

25

I both like your thinking

I both like your thinking and swearing and attitude! Progress is king!

I would create a filter for the sharps, but I have a deadline at work, so no time, but glad to know you are moving on!

(I know that nobody trust that I could actually make such a filter, but ā€¦)

26

quad encoder
I thought you used them as wheel encoders? Was that a different story? You still have those?

27

Nopeā€¦
These are the wheel encodersā€¦ and as I remember, yet another shout-box episodeā€¦

28

Sharp like these?

GP2Y0A21 https://www.robotshop.com/letsmakerobots/node/3172 ?

(up to 80 cm, 32 inch)

Ā 

29

twss
twss

30

When I said "not in the shoutbox"

oh never mind ā€¦

whatā€™s the use 8-p

31

(up to 80 cm, 32 inch)ā€¦

twssā€¦

Thatā€™s a pretty good one, fritsā€¦ Gotta give you that one.

32

yes rik

Yes, rikā€¦

those are the sharps I am using, but again not for wheel encoders but rather for actual distance sensing arond walterā€™s chassis.