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Breakout board for valves control
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Breakout board for valves control

by Kurykulom on Wed Sep 08, 2021 4:20 am

Hello,

I was thinking of using the TLC59711 PWM LED Driver Breakouts as described here https://learn.adafruit.com/tlc5947-tlc59711-pwm-led-driver-breakout?view=all for controlling valves instead of LEDs.
Here is the reference of the valves https://www.smc.eu/en-eu/products/s070-3-port-solenoid-valve-compact-direct-operated-for-manifold-use~75559~cfg?partNumber=S070M-6BC-32 and datasheet is attached
I am a beginner in electronics so I wanted to have your opinion whether or not this is a good idea? If the valves would fit with the board? Is there another board that would fit better? and if I would need an external power supply for them?

Thanks in advance for you answers!
Attachments
imm_s070_tfi31gb.pdf
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Re: Breakout board for valves control

by adafruit_support_bill on Wed Sep 08, 2021 6:38 am

The spec sheet lists several variants in the series. What is the operating voltage and current for the valve you are using?

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Re: Breakout board for valves control

by Kurykulom on Wed Sep 08, 2021 2:35 pm

Voltage is DC 12V and the spec sheet indicate 0.35W(standard) so I guess it operates at 30mA

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Re: Breakout board for valves control

by adafruit_support_bill on Wed Sep 08, 2021 2:50 pm

The TLC59711 is capable of up to 60mA. As shipped, it is set to 15mA. To get 30mA, you will need to replace the reference resistor with a 1.65K ohm.
https://learn.adafruit.com/tlc5947-tlc5 ... t-940505-5

You will also need a kickback (A.K.A. Flyback or Snubber) diode wired in parallel with the solenoid to prevent damage to the TLC59711.
https://en.wikipedia.org/wiki/Flyback_diode

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Re: Breakout board for valves control

by Kurykulom on Wed Sep 08, 2021 6:48 pm

And if I use the TLC5947 instead of the TLC59711, can I use it without replacing the reference resistor? It seems to be made for 30mA.
The TLC5947 has 24 separate channels. Does it means I can control my 24 valves independently?
Thank you for all your answers!

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Re: Breakout board for valves control

by adafruit_support_bill on Wed Sep 08, 2021 7:14 pm

Both boards are configured for 15mA per channel. To get 30mA output from the TLC5947, you need to replace the reference resistor with 1640 ohms as shown in figure 10 here:
https://cdn-shop.adafruit.com/datasheets/tlc5947.pdf

The kickback diode per channel is also needed as with the TLC59711.

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Re: Breakout board for valves control

by Kurykulom on Thu Sep 09, 2021 2:30 am

Sorry I couldn't identify where the reference resistor is on the board picture/board design file.
Could you please highlight it some screenshot picture?
Thank you!

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Re: Breakout board for valves control

by adafruit_support_bill on Thu Sep 09, 2021 6:08 am

On both boards, it is the component inside the white resistor outline on the left side of the board. The existing resistor is marked "332". There are breakout holes at each end for soldering in a through-hole part.
Image
Image

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Re: Breakout board for valves control

by Kurykulom on Thu Sep 09, 2021 7:49 am

Many thanks for all your answers!
I will try and keep you posted.
Have a nice day :)

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Re: Breakout board for valves control

by Kurykulom on Fri Sep 17, 2021 12:02 pm

I tried with 8 valves for now and it seems to work well.
I didn't had to add the flyback diodes because my valves had them integrated already.
Thanks again for your help!
And the tutorials are really well explained, amazing work!

Best,

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Re: Breakout board for valves control

by adafruit_support_bill on Fri Sep 17, 2021 12:17 pm

Good to hear that is working for you. Thanks for the follow-up.

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