tag:blogger.com,1999:blog-1543389024527713336.post563325332061407831..comments2024-02-14T10:44:15.547+01:00Comments on ArduPicLab: How to modify analog output range of Arduino DueGiovanni Carrerahttp://www.blogger.com/profile/04443703611514833137noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-1543389024527713336.post-26785149244683424162023-06-09T19:01:20.105+02:002023-06-09T19:01:20.105+02:00Greetings,
I knew it: using rail-to-rail op-amps i...Greetings,<br />I knew it: using rail-to-rail op-amps is much better, but many can't easily find them in shops around town or at home.<br />Best regards,Giovanni Carrerahttps://www.blogger.com/profile/04443703611514833137noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-79068952855423541842023-06-07T12:43:12.018+02:002023-06-07T12:43:12.018+02:00This is a useful circuit. I built it with the LM35...This is a useful circuit. I built it with the LM358 op amp. After setting Rp the best Vout minimum was ~30mV. I swapped for a MCP6022 op amp, which is pin compatible and in-expensive. The frequency response is better and the minimum voltage dropped to 6mV.David Pattersonnoreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-67902687971251302552020-01-15T11:01:29.230+01:002020-01-15T11:01:29.230+01:00hi,
i am working on a simple circuit in which i us...hi,<br />i am working on a simple circuit in which i use ADC's output as DAc's input. since the voltage range is different for both i wanted to use this concept to modify the offset voltage so that the range of DAC is same as ADC's (0v - 3.3V ). but i used the differtial amplifier without capacitor's and pot (instead used 0.55V input as suggested Vp = 0.55V and Vi(DACout) = 0.55V), which gave output V0 = 0.03V. when DACout =2.75 then V0 = 2.62V but the reuired V0 = 3.3V. is this because of not using capacitors? i am ataaching the circuit diagram link i used with its values please let me know the changes to be done and if i have to use capacitors will 100nF work with these resistors?<br />https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiD5_SkyIDnAhUMyqQKHW4hAqMQMwhHKAEwAQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDifferential_amplifier&psig=AOvVaw2Vzny3KSTdFe45HmwpH7YH&ust=1579004502746851&ictx=3&uact=3<br /><br />Op Amp used is LM324N<br />V1 =Vp =0.55V ; V2 = DACout(0.55V - 2.75V)<br />R1 =22K ohms ; R2 = 10K ohms ; Rf = 33K ohms ; Rg = 10K ohms<br />have given Vcc and ground connections too (+12V).<br />Anonymoushttps://www.blogger.com/profile/02992613516951681851noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-29140264453479996182019-06-10T12:08:10.198+02:002019-06-10T12:08:10.198+02:00Hello,
What is the formula for a voltage divider a...Hello,<br />What is the formula for a voltage divider and a potentiometer ? <br />Because the resistor from the potentiometer should appear in the formula ..<br /><br />ThanksLalaggnnoreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-60973284834582530622019-04-29T21:29:03.655+02:002019-04-29T21:29:03.655+02:00Interesting article!, I've worked with the LM7...Interesting article!, I've worked with the LM741 Very well, i didn't understand the ''single-supply'' thing you said.Brian_vzhttps://www.blogger.com/profile/06181208420229280104noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-49782400331918836012019-04-29T21:24:52.815+02:002019-04-29T21:24:52.815+02:00It's the same principle.It's the same principle.Brian_vzhttps://www.blogger.com/profile/06181208420229280104noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-85131927725931105622019-04-10T12:12:44.611+02:002019-04-10T12:12:44.611+02:00my problem input voltage 0.7V-4.3V output voltage...my problem input voltage 0.7V-4.3V output voltage 0-5V how to analysis circuit,<br />Anonymoushttps://www.blogger.com/profile/13773193661905302990noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-32113895649299206962015-08-13T07:09:54.266+02:002015-08-13T07:09:54.266+02:00Yes, I did it yesterday, in Megatopic (in Italian)...Yes, I did it yesterday, in Megatopic (in Italian) and replying to some questions in the Arduino Due Forum, inserting this link, Thanks for your interestGiovanni Carrerahttps://www.blogger.com/profile/04443703611514833137noreply@blogger.comtag:blogger.com,1999:blog-1543389024527713336.post-49083540640692266872015-08-12T23:03:45.763+02:002015-08-12T23:03:45.763+02:00This should be placed somewhere in Arduino's s...This should be placed somewhere in Arduino's site. If not in a official page, in Playground at least. Thanks for your jobOsquihttps://www.blogger.com/profile/15711246400408343032noreply@blogger.com