I am trying to drive a control valve from my raspberry pi with an analog output. This load requires a DC analog signal of 4.7-6 VDC, at average dc currents of 100mA.
I have a DAC, the MCP4725, that I have been using for other applications, but the chip can only output 25mA as far as I know. Basically this DAC would be perfect, were it not for the power limitations.
I am using a raspberry pi model B.
Does anyone have an idea to recommend? Perhaps just another more powerful DAC that can be driven from the PI like the MCP4725?
Thanks, I would appreciate any input
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klricks
- Posts: 7172
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Re: Analog output
If that is just a simple on off control valve then all you need is a simple relay or transistor circuit.
Give a link to the data sheet of the valve.
Give a link to the data sheet of the valve.
Unless specified otherwise my response is based on the latest and fully updated RPiOS Buster w/ Desktop OS.
Re: Analog output
Unfortunately it's a proportional control valve, so I need the analog signal. These things open to varying amounts based off the input. Here is the datasheet:klricks wrote:If that is just a simple on off control valve then all you need is a simple relay or transistor circuit.
Give a link to the data sheet of the valve.
http://www.porterinstrument.com/content ... -Valve.pdf
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Laurens-wuyts
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Re: Analog output
This is a great idea! I just wish I thought of it. ThanksLaurens-wuyts wrote:You could use an opamp at 1 gain.
http://www.learningaboutelectronics.com ... ain-buffer
Laurens