-
Hardware & Machines
-
Driver Boards
-
7i73 questions
7i73 questions
-
tecno
-
Topic Author
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 1855
-
Thank you received: 127
-
-
12 Jun 2017 13:15 #94426
by tecno
Yes that is a good candidate too if it works OK with 3.3V level. Will setup simulation and see what I can find out.
BC547A will certainly do the trick as well.
Please Log in or Create an account to join the conversation.
-
andypugh
-
-
Away
-
Moderator
-
Less
More
-
Posts: 23560
-
Thank you received: 4858
-
-
12 Jun 2017 13:19 #94427
by andypugh
Yes that is a good candidate too if it works OK with 3.3V level.
The 2803A should:
"The ULN2803A is comprised of eight high voltage, high current NPN Darlington transistor pairs. All units feature
a common emitter and open collector outputs. To maximize their effectiveness, these units contain suppression
diodes for inductive loads. The ULN2803A has a series base resistor to each Darlington pair, thus allowing
operation directly with TTL or CMOS operating at supply voltages of 5 V or 3.3 V. "
Please Log in or Create an account to join the conversation.
-
tecno
-
Topic Author
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 1855
-
Thank you received: 127
-
-
-
tecno
-
Topic Author
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 1855
-
Thank you received: 127
-
-
16 Jun 2017 12:51 #94570
by tecno
Having second thoughts about home/limit switch voltage. I have always had 24VDC on my switches but is there anything against using 3.3/5V on the limit/home switches? (would make life a bit easier
)
Cheers
Bengt
Please Log in or Create an account to join the conversation.
-
Todd Zuercher
-
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 5009
-
Thank you received: 1443
-
-
16 Jun 2017 14:50 #94582
by Todd Zuercher
They can be more susceptible to noise, and long wire runs will have more voltage drop issues. That said, I use 5v on a lot of limit switches without problem (10 meter wire runs).
Please Log in or Create an account to join the conversation.
-
tecno
-
Topic Author
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 1855
-
Thank you received: 127
-
-
16 Jun 2017 16:22 #94596
by tecno
Hi Todd,
that is why I used to run 24VDC, but my cables are within 5-6m so 5VDC should be OK.
I will try to run with 5VDC and see if I get in trouble.
Cheers
Bengt
Please Log in or Create an account to join the conversation.
-
tecno
-
Topic Author
-
Offline
-
Platinum Member
-
Less
More
-
Posts: 1855
-
Thank you received: 127
-
-
-
Hardware & Machines
-
Driver Boards
-
7i73 questions
Time to create page: 0.097 seconds
