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Ok so long story short I have no idea where I got this from I have no idea who would use it so if someone has a use for this PM and it’s yours
Micronta Logic Probe
Hope it goes to a good home
You’ll need to find someone that builds their own circuit boards to get rid of that.
My neighbor is a very involved electrician, do you think we could arrange something?
PM me info cheers
This is a digital logic probe.
Working with DC voltages you will find two basic types of signals.
Types of signals:
Analog- a voltage that can change from 0VDC – (max)VDC. An example would be a voltage gauge in your truck. It reads the DC voltage of your trucks battery and translates it to an LCD/LED/orDial. If the battery is dead it will read 0VDC, if it has a good charge it will read around ~12VDC
Digital- although technically still a voltage like analog, we don’t care about the ‘range’. Instead consider a digital system to be binary. Only two possible output/inputs. 1 or 0, a 1 = 5VDC; 0 = 0VDC. Im simplifying the theory a bit, as the voltage level for a 1 in most 5VDC systems is around ~3vdc. But you can think of it as, a 1 in digital means there is ENOUGH voltage at the pin, a 0 means there is NOT enough voltage at the pin.
-So what the hell does your logic probe do? Well, often when troubleshooting digital logic you can’t just probe a wire or pin like with an analog circuit & multimeter. In digital you can change the circuits characteristics when by touching pins/wires. Loading an input, high impedance, .. and a few other $100 words
That logic probe will allow you to check the ‘state’, 1 or 0, of the circuit without loading it down. Also, because of how fast a digital logic can change from a 1 –> 0, you would never see the transition with your naked eye. The logic probe has a ‘buffer’, it reads the ‘state’ of whatever your testing and displays the results, for a longer period of time then the circuit would normally allow. Also, it can tell you if the ‘state’ is toggling. Think about the output from your blinker relay. 12v –> 0v –> 12v –> 0v = 1 –> 0 –> 1 –> 0 = high –> low –> high –> low : you see how the ‘state’ of the relay changes between 12v and 0v, on & off, 1 & 0. Now the blinker is slow enough for the human eye to view, however most digital circuits operate in the milliseconds range. Much too fast to view with the naked eye.
Do I need it? No, but I would use it. However not often as I do have a really nice logic analyzer. I would rather see this tool go to someone deserving.
yes it is gone….
This is way old, but I have a question for you. I install remote start, and though I use a wiring diagram to find the various circuits I need, I always double check with a DMM that the wires are doing what I’m expecting them to, thus verifying I have the right wire.EEtwidget wrote:
This is a digital logic probe.
Working with DC voltages you will find two basic types of signals.
Types of signals:
Analog- a voltage that can change from 0VDC – (max)VDC. An example would be a voltage gauge in your truck. It reads the DC voltage of your trucks battery and translates it to an LCD/LED/orDial. If the battery is dead it will read 0VDC, if it has a good charge it will read around ~12VDC
Digital- although technically still a voltage like analog, we don’t care about the ‘range’. Instead consider a digital system to be binary. Only two possible output/inputs. 1 or 0, a 1 = 5VDC; 0 = 0VDC. Im simplifying the theory a bit, as the voltage level for a 1 in most 5VDC systems is around ~3vdc. But you can think of it as, a 1 in digital means there is ENOUGH voltage at the pin, a 0 means there is NOT enough voltage at the pin.
-So what the hell does your logic probe do? Well, often when troubleshooting digital logic you can’t just probe a wire or pin like with an analog circuit & multimeter. In digital you can change the circuits characteristics when by touching pins/wires. Loading an input, high impedance, .. and a few other $100 words
That logic probe will allow you to check the ‘state’, 1 or 0, of the circuit without loading it down. Also, because of how fast a digital logic can change from a 1 –> 0, you would never see the transition with your naked eye. The logic probe has a ‘buffer’, it reads the ‘state’ of whatever your testing and displays the results, for a longer period of time then the circuit would normally allow. Also, it can tell you if the ‘state’ is toggling. Think about the output from your blinker relay. 12v –> 0v –> 12v –> 0v = 1 –> 0 –> 1 –> 0 = high –> low –> high –> low : you see how the ‘state’ of the relay changes between 12v and 0v, on & off, 1 & 0. Now the blinker is slow enough for the human eye to view, however most digital circuits operate in the milliseconds range. Much too fast to view with the naked eye.
Do I need it? No, but I would use it. However not often as I do have a really nice logic analyzer. I would rather see this tool go to someone deserving.
Now, I often splice into wires that carry data only. There doesn’t seem to be any good way to verify these, so I’ve always trusted my diagrams with no disastrous results to date.
So I’m wondering, would a tool like this be useful in verifying these data wires. I’m thinking I could give it certain stimulus while testing. For example, if I’m looking for a wire that I suspect to carry data for lock/unlock, I could use a logic probe while activating the lock switch and see activity, thus verifying that I had what I wanted?
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I’ve never found much use for logic probes. I had one for a while but it just never got used and when I lent it out I never bothered to get it back. It’s slightly faster than a DMM if you need to go down a row of pins and check the signals but that’s rare enough it’s not worth keeping around.