The lines from an USB wire are very thin. Any tip should do.
Is the solder melting and sticking to the tip? Can you pre-tin the wires or are they coated? Can you upload a picture of what you are trying to do?
What temperature are you using?
grasib
joined 1 year ago
You’re right of course. Two more questions if you don’t mind:
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- what’s the 1k || 100k doing?
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- if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.
At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.
Is that correct?
Exiting! It has been some time for me too, let me know how you solved the problem at the end.
In my opinion an oscillator always produces an AC sine wave. There is usually no need for a DC overlapped oscillator signal. The DC supply of an oscillator produces a AC sine wave relative to GND.
Where exactly did you measure a DC sine wave, relative to what, and what do you mean by “AC removes a DC component”?
Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input.
Not entirely sure, but maybe these help you somehow:
The relay has a coil which requires 0.35W. The chip seems to have a maximum output current of 35mA.
The ‚switch on current‘ of an inductive load is usually 3 to 5 times higher than the ‚hold‘ current.
The valve may not have a free-wheeling-diode. This could create an issue by creating strange voltage spikes on all your supply voltages (connected by GND).
Are you unpacking them directly on your NAS?
Because chances are, that if you use a Synology and map the drive or use the GUI, that the data keeps getting transferred between your PC and the NAS. This is a very slow process, especially if you connect by WiFi.