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Thermocouple amplifier always gives same output
I have 2 of Adafruit's analog thermocouple amplifiers:   Analog Output K-Type Thermocouple Amplifier - AD8495 Breakout   and 2 thermocouples.   Though I have one in...
Wednesday, 23 January 2019 - 21:59
ili9341 suspicious looking library code
I can't seem to draw anything below z=255 using this library and I suspect this bit of code:   void ili9341_setaddress(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2)//set...
Monday, 14 January 2019 - 21:50
I think my integrated motor driver chip shorted.
My train controller is a short circuit from + to -. The H-bridge, VNH5019A, seems to be a short. It was rated for 5 amps, the battery shuts down at 7 amps and there's a 5A fuse. I...
Wednesday, 15 August 2018 - 20:05
24vac valves and motors
I just looked at a contraption with 24v AC motors and solenoids controlled by relays. As expected, it goes mildly haywire when he turns one of these motors on or off. If it was DC...
Thursday, 1 February 2018 - 19:25
LM2840 CBoot capacitor
Searching the data sheet, I don't find anything about the voltage needed for the CBoot capacitor.     I design train related things for 10 to 30 volt input. ...
Thursday, 9 November 2017 - 22:51
Mega328 timer 2 interrupt
As soon as I set the TIMSK to enable timer 2 interrupt, my program stops working, so obviously, I've overlooked something:   Setup routine: void setup() { pinMode(...
Monday, 3 July 2017 - 15:59
Can't debug my Arduino Nano with Studio 7
Eek!   I imported and built my sketch. Programmed the arduino using my Atmel ICE. Of course the program isn't working, that's why I'm trying to debug.     But when...
Monday, 3 July 2017 - 14:55
Funny how that works....
Working on an Arduino project for a magazine article. Was just about working right, and I decided to make a small change in the program. Now it's completely doing nothing like it'...
Sunday, 19 March 2017 - 21:16
"High" is half a volt?
I've been using some TSOP2438 infrared receivers to detect trains and the like blocking flashing IR LEDs for quite a while now, but I've been stuck for several days on a project...
Monday, 20 February 2017 - 20:57
Installing on another computer. Yet another computer.
Trying to install Studio on yet another replacement computer, but it keeps asking me over and over again if I really want to install   Atmel Corp. Ports (COM&LPT) Jungo...
Sunday, 22 January 2017 - 16:18
PR0 and PR1
In a battery system where you don't want to leave inputs floating, what do you do with PR0 and PR1 if you're not using a crystal? I've just always ignored them, but I wonder if...
Friday, 6 January 2017 - 16:21
Split from LM75 through hole alternative
Don't be afraid of SMD. The first time I tried it with my plain soldering iron, I decided to forget DIPs. Get yourself some small Solder braid.   Thread split from:  ...
Thursday, 15 December 2016 - 20:13

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