Using MSR1 board as demo board

seasonal

Hi there just having a little bit of trouble using my MSR1 as a demo board (I know 'why don't i just buy the demo board' it's just what i have at my disposal).
Right I have been trying to use the output pins (16-23) to light up/turn off LEDS as per the examples in the tutorials but they are on constantly. The voltage translator has been by passed and the Led's are in series with 240 ohm resistors. The Led's are mounted on headers, and placed on the black and red rows of pins.
Do the positive terminals on the LED's need to be mounted on the direct acces via's and the negitive to earth on the board for them to behave as per demo board?

Cluso99

seasonal: Welcome to the prop! Unfortunately I do not know the MSR1 board so I cannot help. Hopefully someone else who knows will answer shortly. Otherwise, perhaps a photo might help.

schill

Propeller Robot Control Board (MSR1):

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/msr1/List/0/SortField/4/ProductID/584/Default.aspx

I don't have one, but I believe you are connecting the LEDs to the servo power and ground.

B(lack) : ground
R(ed) : servo power
W(hite) : signal

Connected between B and R, the LEDs will always be on. Try connecting the LEDs between B and W.

hover1

Yes, You have that correct. The Cathode of the LED goes to ground, and the Anode to the area in the attached picture. Make sure you keep the 240 resistors in line.



Jim

seasonal wrote: »

Hi there just having a little bit of trouble using my MSR1 as a demo board (I know 'why don't i just buy the demo board' it's just what i have at my disposal).
Right I have been trying to use the output pins (16-23) to light up/turn off LEDS as per the examples in the tutorials but they are on constantly. The voltage translator has been by passed and the Led's are in series with 240 ohm resistors. The Led's are mounted on headers, and placed on the black and red rows of pins.
Do the positive terminals on the LED's need to be mounted on the direct acces via's and the negitive to earth on the board for them to behave as per demo board?

hover1

Yes, he had the LED's between power and ground, that's why they were on all time. Connecting to the White will do no good now that he has the translator disabled. There is no signal going to it.

Jim

schill wrote: »

Propeller Robot Control Board (MSR1):

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/msr1/List/0/SortField/4/ProductID/584/Default.aspx

I don't have one, but I believe you are connecting the LEDs to the servo power and ground.

B(lack) : ground
R(ed) : servo power
W(hite) : signal

Connected between B and R, the LEDs will always be on. Try connecting the LEDs between B and W.