baileychic
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Today, 19:16baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersOkay so I need a pullup on PIC18F pin 41 that is E1 signal connection ? That's all I need on hardware ? Changes have to be made in code ? Please...77 replies | 2056 view(s)
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Today, 18:34baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersWhich is !SS signal ? !CSx signals ? If yes, I need 8x pullup resistors ? Not working yet. You mean I have to modify circuit like in attached...77 replies | 2056 view(s)
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Today, 14:44baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersThis is my current code to read MAX31855 but in Proteus simulation I am getting only 0.00 for all TC (thermocouple) readings. What is the problem...77 replies | 2056 view(s)
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Yesterday, 08:54baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersPlease check circuit in page no. 13/22. In the power supply filter circuits for C7 and C8 it is mentioned (NC) Not connected. Can I omit them from my...77 replies | 2056 view(s)
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19th February 2019, 19:04baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersAny problem if I put pullup resistors on 8x CSx lines when 74HC138 is used ?77 replies | 2056 view(s)
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19th February 2019, 16:04baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt and FvM Got it. And I need 8x pullup resistors on the 8x CSx lines when 74HC138 is used ?77 replies | 2056 view(s)
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19th February 2019, 15:47baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@FvM But where does the 8x CSx lines output come out of 74HC138 ? Which pin of 74HC138 I have to connect to PIC to control CS lines ? Is this...77 replies | 2056 view(s)
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19th February 2019, 15:32baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersCan you show how I can use 74HC138 to select one TC amplifier at a time ? I am not getting it. SCK line is common to all but CS and SO pins are...77 replies | 2056 view(s)
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19th February 2019, 11:06baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersWe used Idle mode instead of sleep mode. I have a new question. Find the attached latest schematic (TMS-MB-SSL4.PDF). We had to revert back to...77 replies | 2056 view(s)
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17th February 2019, 18:18baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersRegarding post #60 do I need an external Crystal at T1OSO/OSI pins so that I can make PIC wakeup from sleep using Timer1 ? By enabling T1OSCEN_bit ?77 replies | 2056 view(s)
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17th February 2019, 16:16baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersHow can I wake up the device from sleep using Timer1 ? ...77 replies | 2056 view(s)
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16th February 2019, 15:49baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersDevice wakes up from sleep and then reads the thermocouples and transmits the data and then goes to sleep and repeats it according to the set delay....77 replies | 2056 view(s)
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16th February 2019, 12:59baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ Aliciamoore There are no problems with thermocouples. We are using 8x K-type thermocouples to measure furnace temperatures and 1x DS18B20 to...77 replies | 2056 view(s)
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16th February 2019, 10:38baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@betwixt We can't use the pre-built WROOM-02U module as the other associated components like Crystal Oscillator and SPI flash used on that module...77 replies | 2056 view(s)
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16th February 2019, 07:49baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersThe power supply circuit is finalised. Now I have a new question and it is related to ESP8266EX circuit for the same project. We couldn't find...77 replies | 2056 view(s)
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15th February 2019, 16:20baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt Okay. Will look at BAT54C.77 replies | 2056 view(s)
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15th February 2019, 12:05baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt No, I need the trimmers. Client will use either 4x or 2x batteries and so charging voltages will be either 16.8V or 8.4V from U1....77 replies | 2056 view(s)
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15th February 2019, 06:21baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersWe found the 2-Way and 3-Way 5.08 mm Pitch, OT +125 deg C type terminal blocks (MI-252 (35/45)). Find the attached final schematic for the Power...77 replies | 2056 view(s)
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12th February 2019, 03:02baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@d123 I need PCB mount type terminal blocks.77 replies | 2056 view(s)
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11th February 2019, 16:25baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersI am unable to find WROOM-02U that works at +125 deg C and hence we are thinking about putting ESP8266EX (which can operate at +125 deg C) on the...77 replies | 2056 view(s)
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11th February 2019, 13:10baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersFrom LM2595 datasheet page no. 25 for fixed voltages of 12V (Vin max 30V) and 3.3V (Vin max 40V) with Iout = 1A I found inductor values as 150uH...77 replies | 2056 view(s)
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11th February 2019, 11:40baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersWhat is the difference between SMPS and LM2595SX ? I decided too use LM2595SX-ADJ to get either 16.8V or 8.4V from 20V max input and LM2595SX-12...77 replies | 2056 view(s)
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11th February 2019, 10:27baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt Mention one. They need external inductors ? I need 1.5A output current from primary regulator. Fan is for cooling Peltier heat sink....77 replies | 2056 view(s)
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11th February 2019, 08:31baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersOkay, I finalised the R2 calculations. For Vout = 1.21V to 20V and Iadj = 3uA to 7uA the R2 value lies between 0 Ohms and 50k Ohms. My requirement...77 replies | 2056 view(s)
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11th February 2019, 06:46baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersOkay, I considered Iadj as 3uA only. Here are my calculations and final schematic. Any changes needed ? 12V is for motor. It can vary a little...77 replies | 2056 view(s)
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10th February 2019, 15:43baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersI decided to use LT1963A LDOs. My ground is 0V. I am using both LT1963A-ADJ (to get 12V) and LT1963A-3.3V (to get fixed 3.3V). I want to know...77 replies | 2056 view(s)
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8th February 2019, 05:26baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@betwixt Okay, we will see if Peltier cooling can be increased by some other means but assuming Peltier can give 18 to 20V then can we charge 4x...77 replies | 2056 view(s)
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7th February 2019, 20:07baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersIf we use 4x 3.7V batteries in series to get fixed 12V 350mA for fan and 3.3V 150mA for other parts of the circuit then can we charge the 3x 3.7V...77 replies | 2056 view(s)
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7th February 2019, 06:58baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt Okay, I will ask client if they can directly solder the thermocouple probe to PCB else we will use the Omega connectors. We are now...77 replies | 2056 view(s)
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6th February 2019, 07:49baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ experts I was checking these for thermocouple to PCB connectors. They suit my requirements but in the below datasheet what is it that is...77 replies | 2056 view(s)
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