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Silence is golden (?) from metal detector band
Just finished my PCB 2 soldering and started device and nothing... same voltages as should be.
Must aquire few ICs.
LM358P is going to recycle bin.
His friend NE555N also ...
Rest of them ICs...
NE5534P
SMD one (7660) is working fine, giving out -4.0-4.5 V
HEF4066BP NXP and HEF4093BP NXP
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Originally posted by sdesic View PostSilence is golden (?) from metal detector band
Just finished my PCB 2 soldering and started device and nothing... same voltages as should be.
Must aquire few ICs.
LM358P is going to recycle bin.
His friend NE555N also ...
LM358N = plastic DIP (manufacturer "x")
LM358P = plastic DIP (manufacturer "y")
Each will be stamped with a different manufacturer's logo. (I am in a hurry or I would chase down more details).
Now perhaps one or the other of the manufacturers has a better process and thus produces better product, so if you want to believe that the LM358P is inferior, that is OK. Interesting possibility.
I will be a good thing to replace any NE555 with a CMOS version from one manufacturer or another. Which manufacturer (and which prefix they use) will make little or no difference so long as it is CMOS, and not old style bipolar technology (usually with either NE or LM prefix).
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LM358P
LM158,258,358(A),2904(V) Datasheet 8-DIP 50 Integrated Circuits (ICs) Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps - General Purpose 2 - 0.3 V/µs 700kHz
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LM358N
LMx58 Datasheet 8-DIP LM358 View All Specifications 50 Integrated Circuits (ICs) Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps - General Purpose 2 - 0.6 V/µs 1.1MHz
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You might be right, but please, WHERE are you getting this from??
Like I said, you may be right but on the other hand, these are "nutshell" specifications you quoted. It could amount to (Newark, or Futurlec, maybe?) using personnel from their catalog division to convey electrical specifications that they know little about.
Could be the difference between one manufacturer listing "minimum" specs and another manufacturer stating "typical" specs which would amount to an unfair comparison!
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hello
i finished two boards of surf xx (appies version)
and they work
did i have to set multimeter an AC or DC measurement when setting Offset trimmer and measure positive rail and pin6 on ne5534?
normally i have multimeter on DC but this time i can measure high voltage values up to 11V (range 2-11V) while measure and trimming the offset trimmer
what can be the reason if i cant set it to "0" volt
should i go outside far away from any metal? how is i done by the commercial builders do they go off their producing rooms to set the machines
so
how do i connect the multimeter right and how do i make the offset setup procedure
in the past i have seen that the best positon is not around zero volt (accordig to coil 2-4V)
seems that i have not fully understand the thing and i walk in the dark
so thanks for tips
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