hydronics

Product TOL-12967 about 5 months ago

will this diode tester light up an LED?

I have one meter that can do this but haven’t found another in years… at my $70 price point..

“A digital multimeter with a Diode Test function can be used to test LEDs of various colors if the DMM applies a sufficient voltage potential at the meter leads to overcome the forward voltage requirement of the LED. The Diode Test function typically applies 2 mA of current to the diode under test. This current along with enough voltage to overcome the forward bias requirement is usually enough to illuminate most LEDs.”

Most DMM are around 1.5V and fall short of the 2.5-3V you really want. The literature for this multimeter under diode testing says, “Forward DC current is about 1.0mA, and backward voltage is about 3.0V.” The term backward voltage is confusing… is this forward voltage? Will this light up an LED? thank you, thomas

Product CAB-12977 about 2 years ago

Hello! Is the 3.3v RX pin 5V tolerant? thanks,

Tutorial - WAV Trigger Hookup Guide V11 about 2 years ago

I struggle for way too long to change the pin on altSoftSerial to other than pin 9. I finally got it to work by using softwareSerial library as follows.

#include <SoftwareSerial.h>
#include <wavTrigger.h>

SoftwareSerial wavSerial(6,5);  //pin 5 is used to TX to wave trigger pin 6 is not used

void setup() {
  wavSerial.begin(57600);
}

void loop() {
  uint8_t txbuf[8];
  int trk = 1; //plays track 1
  int code = 1; //plays polyphonic (see wavTrigger.h library for codes)

  txbuf[0] = 0xf0;
  txbuf[1] = 0xaa;
  txbuf[2] = 0x08;
  txbuf[3] = CMD_TRACK_CONTROL;
  txbuf[4] = (uint8_t)code;
  txbuf[5] = (uint8_t)trk;
  txbuf[6] = (uint8_t)(trk >> 8);
  txbuf[7] = 0x55;
  wavSerial.write(txbuf, 8);

  delay(2000);

}

Tutorial - Big Easy Driver Hookup Guide about 2 years ago

I’m new to stepper motors.

I changed the delay(stepValue) functions below to delayMicroseconds(stepValue); and it smoked the board. Any idea why?

digitalWrite(stp,HIGH); //Trigger one step forward

delay(stepValue);

digitalWrite(stp,LOW); //Pull step pin low so it can be triggered again

delay(stepValue);

Product ROB-12859 about 2 years ago

where does the heat sink go? thank you, thomas

Tutorial - ADXL345 Quickstart Guide about 2 years ago

There’s a typo in the above advanced code… line 129 in the sketch.

It should say tapType = 0; in lieu of intType = 0;

Product COM-12959 about 3 years ago

hey good luck wiring this if you don’t have EAGLE. The schematic makes some sense but it doesn’t have corresponding markings with the PCB so it doesn’t help you wire the mosfet.

• Gate is the control pin marked C on the 3 pin connector.
• Drain is the (-) pin on the 2 pin connector
• Source is the (-) pin on the 3 pin connector
• both (+) pins are connected.

I shorted the (+) and (-) source pin to make more landing spots for Source as the board seems pretty useless for my projects without this.

Product DEV-13724 about 3 years ago

the pictures next to the product show a model B+ and not the model 2. Just a bit confusing as I was looking for the 1 gig chip on the back of the board…. but the product details clearly describe the model 2.. phew…

Tutorial - Easy Driver Hook-up Guide about 3 years ago

Ok, thanks, I didn’t think to check the firmware directory.

Tutorial - Easy Driver Hook-up Guide about 3 years ago

I have the circuit connected as shown in the diagram…. but I found if you don’t connect the ground from the Arduino to the Easy Driver, the motion is really jerky.

I guess I was kinda surprised at how few pins you have to connect. The guide starts out indicating you have to pull RST and SLP HIGH so I was just waiting to find something to go wrong, albeit ground and not the other two pins. Maybe indicate that those two pins are normally HIGH and add the GND connection in the circuit… or maybe I’m just reading too much into it ;/