How to used the DSO138 digital oscilloscope

hello guys i'm heyman if you are someone just looking to visualize waveform on your electronics project i don't have the money or don't want to spend much money to buy an oscilloscope don't worry i have discovered this is the gso it's a one channel one megahertz digital storage oscilloscope it's small easy to use and very affordable and in this video today i'm going to show you how to use it [Music] this is the gs0138 it comes in a package like this one in this package you find the cable used to connect to the oscilloscope and the device that we want to visualize away from from we have the module itself which is well built and looks very nice and we have some documentation about this device it comes with two documents we have the very first one which specifies how the module is used and also contains the schematic of the whole device so you can use this to build yours well this is not what we're going to use in this video and right here you have the order manual this other manual shows how they bought is is built how the components are placed so that you can buy the components and also buy a version pcb among other components by yourself by following these instructions so this is very good and on the other side here you're going to see a flowchart of how things work on this device as you can see this device is powered with 9 dc 9 volts we have dc9 voltage on the module but it can be powered by with the power supply ranging from 8 volt to 12 volt without a problem i'm using this 12 volt 5 bumpers dc power supply to power this oscilloscope [Music] so this is how it displays okay now let's go to the switches we have three switches here the first switch is the coupling switch which means that if we want to measure an ac signal we flip the switch to the ac parameter on this switch here and on the lcd it automatically indicates there if we want to measure a dc signal we flip it to the dc it indicates there and whatever signal we are measuring here should be dc and then if we want to completely isolate the input to the ground we flip the switch to the ground side these other two switches here are the sensitivity switches the first switch here where we have one volt 0.1 volt and 10 millivolt is used to set the voltage for for the signal we are measuring and down here the sensitivity number two is the multiplier which means that for each division we have here on the voltage scale one square is equal to one volt depending on the multiplier here you will see that let's go to dc you see that if we have one if we select one volt here we have two volts here because the multiplier is set to two if we set the multiplier to one you see the voltage goes to 1. if we set the multiplier to 5 you see the voltage goes to 5 which means that for every division here one division corresponds to 5 volts so let's go to the buttons we have four buttons here the first button is the select button as you can see on this display we have many parameters we have the time scale we have the auto we have the following horizon edge we have all these parameters on this on this display here can be changed and to change any parameter on this particular display we have to select it so this select button is used to select those parameters so let's uh select auto if we select auto you see this particular it highlights photo on the display we go to the resin edge it highlights it so that's how you can select also the the cursor on the voltage scale so we can change those parameters and then we have two other buttons we have the plus button and we have the minus button these buttons here are used to adjust the parameters selected by this select button right here we have only time scale so if we if we want to increase the value we just go on the plus gonna be decreasing we just go on the plus and you can see that the values change you can decrease it with the minus button so these two buttons here are used to adjust the parameters selected by the select buttons and then the ok button is here to validate the adjustment made with these two buttons so if i selected if i decided to put one millisecond here i want to validate that i just come and click on ok and now it is selected and you can see that we have one button here as well this button is the reset button which means that we can reset everything from scratch we just like restarting the whole oscilloscope so let's just click on that one you see the oscilloscope restarted [Music] so now let's plug the prop to the oscilloscope [Music] one thing that this um oscilloscope has is that it has a ping so that that generates a one kilohertz signal so we're just going to connect uh clip to this particular connector here and then you see that we have a one kilo head signal being displayed on the on the lcd so you can see how we play now with those values we change the sensitivities so generally these three buttons here have a prop calibration see that when we come to one volt sensitivity 2 is on 5 the signal goes very small so to demonstrate to you how this oscilloscope works and how good it is i prepared this circuit this is a linear power supply as we all know a linear power supply has a transformer rectifying circuit and a capacitor on the output for filtration so right now i'm going to plug my oscilloscope to the transformer output and then to the to the rectifier output and when the capacitor is blocked but before we go into that we always have to make sure that we calibrate the probe of this oscilloscope properly in order to make sure that we are measuring ac signal since the voltage from the transformer is ac we are going to calibrate the probe by setting this switch to ac right here okay it's already done so the next thing we have to do now is to plug the prop of the oscilloscope to the transformer so as you can see right here we have an analog signal displaying on the lcd right there you have some values here right here we have the maximum voltage the minimum voltage the average voltage the vpp the v peak to peak square values we have the frequency in my case it's 50 hertz which is normal we have the duty cycle and other parameters which i don't even understand so the next part the next thing we're going to do is that we're going to plug the transformer output now to the rectifier and then measure the signal on the output of the rectifying circuit let's do that okay now let's connect the oscilloscope to the output of the rectifier after connecting the oscilloscope to the output of the rectifier the next thing we have to do is to go to the coupling switch again and set it to dc since at the rectifier output we have a dc signal let's go there so that's done so you can see right here that we have a dc voltage being displayed here you see the frequency change to 100 hertz and the other values as well so it works well so now let's connect the capacitor so you can see how we're going to modify that signal by filtering the output of this uh of this stuff [Music] so this oscilloscope is good for students and independent makers who don't need something very expensive to visualize waveform of their circuit thank you so much for watching this video if you liked it give me a thumbs up and don't forget to subscribe to my channel for more i'll see you next time on the next one goodbye

Channel: Hermann Labs

Views: 7,408

Keywords: diy oscilloscope kit, diy oscilloscope, diy oscilloscope probe, dso138 oscilloscope, dso138, dso138 oscilloscope tutorial, arduino oscilloscope, arduino oscillator, arduino oscilloscope diy

Id: Ywjgmd1nHIQ

Length: 9min 55sec (595 seconds)

Published: Tue Nov 02 2021