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After some further testing it seems the problem is of a different nature, the test with the blinking led seems to work for a few seconds and then stops blinking. After resetting the microcontroller it most of the time continues blinking until it stops again after a while.
Hello,
I have succesfully connected an MCP23017 to my Arduino Mega and got it to blink a LED using a 330 Ohm resistor. Now I am trying to drive the relay's on a Velleman K6714-16
K6714-16 datasheet: https://www.velleman.eu/downloads/0/illustrated/illustrated_assembly_manual_k6714-16.pdf...
Hello,
I have bought a MeanWell 3.3V switching power supply but when I measure (with a multi meter) the voltage is gives 18 volts. (Measuring over the V+ and V- poles). Is the unit malfunctioning or am I doing something fundamentally wrong?
The datasheet:
**broken link removed**
Regards...
Hi Keith,
the gauges are going to be used in a railway locomotive simulator that I'm going to connect to a simulation game. The reason for the old gauges is that the locomotive i chose as example is a 60 year old German build electric locomotive. The gauges are original from a wreacked...
The solution was a complete succes, the gauge works like a charm. I have made a YouTube video of it in action.
https://www.youtube.com/watch?v=3H2lsUiiWoU
Next on the list is controlling an similar gauge but instead of 3,3 volts and 5Amps it needs 200Volts and not so many amps. I was thinking...
Hi Keith,
The sink/source current of my microcontroller is 40mA. It is a 5 Volt output.
I measured the resistance in the gauge, it is between 0,3Ω and 0,4Ω.
I have an unused computer powersupply which puts out both 5 and 3.3 Volts, so for that I want to use the same power source, just at...
Hi Keith,
I have made diagram of the setup using your suggestion for a logic level mosfet. I'm not completely sure the diagram is correct, maybe I'm doing things that are impossible.
I like to use opto couples between my microcontroller and the mosfet but I don't know if the pwm signal and the...
Hi Keith,
as far as I can see there is no Shunt inside the gauge. It seems like the gauge does respond linear to voltage changes when feeded with 5 Amps. it doesn't really seems te get hot, the coil inside the gauge is rather large and massive. It's 60 years old build quality, build to last!
I...
Hello,
I'm trying to control an old analog gauge using an PWM output. The gauge I use has slightly odd ratings, for a 100% reading it needs 5 Amps at about 1,3 Volt (it comes from an 60 year old railway locomotive).
The three top connectors on the gauge are used for internal light. The bottom...
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