attiny12
2007-02-25 by dpintod
Hello everibody: Can somebody tell me if I can drive a solid state relay directly from the tiny12 or I need a transistor. Thanks, David.
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attiny12
Re: [AVR-Chat] attiny12
2007-02-26 by John Samperi
At 02:15 AM 26/02/2007, you wrote: >Can somebody tell me if I can drive a solid state relay directly from >the tiny12 or I need a transistor. The i/o pins can supposedly drive 20mA, how much current does the solid state relay need to work? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
RE: [AVR-Chat] attiny12
2007-02-26 by AVR Development
As far as I know you can drive that directly from your ATtiny. You just need like 5 mA or so to drive a solid state relay (SSR). Basically, the input to a solid state relay is an optoisolator so it looks just like an LED to the processor. Barry AKA JoeLlama
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-----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of dpintod Sent: Sunday, February 25, 2007 7:16 AM To: AVR-Chat@yahoogroups.com Subject: [AVR-Chat] attiny12 Hello everibody: Can somebody tell me if I can drive a solid state relay directly from the tiny12 or I need a transistor. Thanks, David. [Non-text portions of this message have been removed]
RE: [AVR-Chat] attiny12
2007-02-26 by AVR Development
Basically, you need to put a resistor inline with your port pin to limit current to the LED input of the SSR (solid state relay). You can get by with 5 or 10 mA nicely :) Gotta figure your voltage drop across the port and also the LED in the SSR which is about 1.2 volts forward drop. Then calculate a resistor for the remaining voltage to limit to 5 or 10 mA. Normally, I connect my LEDs to Vcc and sink to the port. Barry AKA JoeLlama
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-----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of John Samperi Sent: Sunday, February 25, 2007 5:43 PM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] attiny12 At 02:15 AM 26/02/2007, you wrote: >Can somebody tell me if I can drive a solid state relay directly from >the tiny12 or I need a transistor. The i/o pins can supposedly drive 20mA, how much current does the solid state relay need to work? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics. <mailto:john%40ampertronics.com.au> com.au Website http://www.ampertro <http://www.ampertronics.com.au> nics.com.au *Electronic Design * Custom Products * Contract Assembly ******************************************************** [Non-text portions of this message have been removed]
Re: [AVR-Chat] attiny12
2007-02-26 by dlc
Will the solid state relay take less than 20ma to turn it on? If so, then yes it will work, if not, no. DLC dpintod wrote: > Hello everibody: > Can somebody tell me if I can drive a solid state relay directly from > the tiny12 or I need a transistor. > Thanks, > David. > > > > > > Yahoo! Groups Links > > > -- ------------------------------------------------- Dennis Clark TTT Enterprises www.techtoystoday.com -------------------------------------------------
RE: [AVR-Chat] attiny12
2007-02-26 by AVR Development
Check the specs of your SSR (look up the datasheet on google if you need to). SSRs usually trigger with 5 or 10 mA (remember, you're just lighting up an LED). Barry AKA JoeLlama
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-----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of dlc Sent: Sunday, February 25, 2007 8:01 PM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] attiny12 Will the solid state relay take less than 20ma to turn it on? If so, then yes it will work, if not, no. DLC dpintod wrote: > Hello everibody: > Can somebody tell me if I can drive a solid state relay directly from > the tiny12 or I need a transistor. > Thanks, > David. > > > > > > Yahoo! Groups Links > > > -- ------------------------------------------------- Dennis Clark TTT Enterprises www.techtoystoday.com ------------------------------------------------- [Non-text portions of this message have been removed]