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I see no 3k3 pullup resistor. There is a 3k3 in series with the gate, which should be 22R and in addition there should be a 100k pulldown (ie gate to 0V) resistor.   I'd...
Saturday, 14 August 2021 - 03:53
Triac Circuit Advice for Zero Crossing
Triacs have their own set of requirements. Voltage drop across a triac is around 1-2V. Multiply that by 5A you have a heatsinking requirement. The I2t rating is normally fairly...
Friday, 16 July 2021 - 23:38
What am I doing wrong in this code?
underestimate the code says you’ve enabled pullups but the switch common goes to 5V. The port pins will not see a logic 0. Move the switch common to 0V and invert your switch...
Monday, 12 July 2021 - 12:38
Basic Soldering tips
Check your soldering iron temperature. If it is too hot the flux will smoke and you'll get dull solder joints. Use the minimum temperature that allows you to work easily.
Saturday, 26 June 2021 - 07:20
LED problems
Measure the voltage cross the leds. Then apply some critical thinking and you'll be able to solve your problem.   Otherwise, add a resistor for each led which is the more...
Thursday, 24 June 2021 - 10:10
Rookie here - Regulating 60V DC-Motor low to high speeds from Encoder pulse signals in C using ATmega88
This question was posted on SE and gave a similar response. in addition I suggested using an 8 bit timer for pwm and a 16 bit timer with input capture.
Tuesday, 22 June 2021 - 21:41
Upload DS18B20 reading to Thingspeak without Arduino IDE
 You want to convert a float value to a string? Printf()/sprintf() is the usual method. There’s also ftoa(). How does Arduino do it? Just look at the Arduino library code -...
Friday, 18 June 2021 - 17:34
functional regions of decapped avr328p?
How does forth relate to the physical implementation of the chip?  forth is hardly new, why not try lisp? There’s ulisp for the AVR if you want to be a new traditionalist.
Monday, 7 June 2021 - 00:01
Decibel measurement software
what kind of decibels do you want to measure? There’s a few related to sound level. Besides, to measure sound pressure levels, you need a calibrated microphone.
Thursday, 3 June 2021 - 13:15
Reading potentiometer(s) with external ADC and short circuit protection
Ok, you’re using a 4 wire measurement technique (kelvin) you probably want to use the adc as ratiometric - ie your voltage sense wires go to refP and refN this means the adc...
Wednesday, 2 June 2021 - 12:52
Looking for some help for how to trigger the ADC to read manually instead of in free running mode
      The adc does what the code configures it to do. With Arduino, the core configures it for one conversion. AnalogRead does a single conversion, so unlessyour...
Thursday, 27 May 2021 - 21:54
ATECC508A authentification IC from Arduino MKRZero board
My guess it is pre-programmed with certificates for Amazon AWS.
Thursday, 27 May 2021 - 14:08