baileychic
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Yesterday, 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 ?60 replies | 1705 view(s)
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Yesterday, 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 ? ...60 replies | 1705 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....60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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.60 replies | 1705 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....60 replies | 1705 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...60 replies | 1705 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.60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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....60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 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...60 replies | 1705 view(s)
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5th February 2019, 13:04baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ andre_teprom Okay, I will ask client (Client's client) to see if any cooling can be provided. Here is the latest almost finalised schematic....60 replies | 1705 view(s)
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5th February 2019, 11:37baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@betwixt It is for measuring furnace temperature.60 replies | 1705 view(s)
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5th February 2019, 04:42baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersYes, Peltier has a cold region. it has a large heatsink ad a cooling fan powered from Petier output.60 replies | 1705 view(s)
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4th February 2019, 12:31baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersWhich RF modules like XBee or LoRa I can use for sending thermocouple data to a PC (Computer) at a distance of not more than 50 meters ? The RF...60 replies | 1705 view(s)
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3rd February 2019, 07:59baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ andre_teprom The +125 degree C is environment temperature where the device is placed. The 12V is not actual 12V. I just used it as reference for...60 replies | 1705 view(s)
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2nd February 2019, 16:52baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersIs the circuit okay now ? - - - Updated - - - Couldn't find any RF modules like XBee or LoRa which can operate continuously at +125 degree C....60 replies | 1705 view(s)
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2nd February 2019, 13:16baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ betwixt Okay, What kind of problems with Thermocouple interfacing circuit ? LiSoCl battery is used.60 replies | 1705 view(s)
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2nd February 2019, 12:34baileychic replied to a thread Embedded project needs devices which can work continuously at +125 degree C in Microcontrollers@ EasyRider and FvM Thanks. So, I can use Automotive/Extended series devices without any issues ? @ FvM Client still have to finalise...60 replies | 1705 view(s)
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18th February 2019
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