Wireless Communication with a Cup of Balls, Coherer Effect

hi coherair is it real is it fake can you close the switch remotely using a lighter I shall Rectify this now well in my last video I saw a video suggestion from four years ago on cohere effect in which someone places some aluminum balls in a cup between two aluminum plates and if those balls touch continuously they close the circuit like a switch and the light turns on but then the balls started touching when he fired their regular lighter close to them and disconnected when he tapped the cup what does fire have to do with closing the circuit but then after four years I searched for cohero effect and realized it is real and it doesn't have anything to do with fire but in that video it supposedly happens by those tiny electric arcs that jump in the lighters with Piezo igniter you know what that thing seems easy enough to manage let's put that video to test first let's take a glass container tape to aluminum electrodes to its sides make a bunch of aluminum balls connect a lamp series to this coherior switch connect the power and pour the balls bad connection trying again no it's on already turn off I can't get to this connector balls come on Let's Bowl don't shove your finger in a pool of Life balls come on there you go only very few balls in there now now the question is will the balls connect together and create a short path adjacent to some electromagnetic interference [Music] maybe not strong enough my magic one can make stronger pulses nothing maybe a few more balls turn off maybe if I use a low voltage DC battery right just use an LED and the coin cell 3 volt battery put the balls back in now the LED is definitely off let's try it it worked [Music] it works it feels like magic how far wow there you go from quite a distance and with such a low power Arc how I wouldn't believe it if I hadn't seen it myself but it works with a like a low voltage DC there's no magic just a battery here and led there see turns on disconnect the balls and the arc connects them wow this is magical and this is something that everyone can do at home too not happens very often on this channel but why cohere is the tiny Arc moving the balls around so they touch maybe I can make a Contraption to test it so I make this contraption with six balls four in the center are hung from the strings and the two on the sides from wires that connect to the battery and the LED and if I push the balls together and connect them the LED turns on as the circuit closes now if I use my lighter [Music] if they keep moving and don't touch there is no way for them to link up why is it so sensitive to my sound back see all the balls are already touching but there is something between them that is blocking the current now if I make an arc there is absolutely no visible motion bow bow and they disconnect from the air vibrations from my sound have to return to the Copco hero because it's much more stable I guess it's less sensitive to sound and vibration too so here's my theory because Wikipedia just says metal balls or particles cling together under high voltage what the hell does that even mean I say all these balls that are barely touching but not making an electrical connection must have a super thin like nanometer thin layer of say metal oxide between them that is isolating them electrically although they are actually touching the electromagnetic radiations from the tiny Arc must be inducing a high enough pulse of voltage across the balls that breaks through that super thin isolating layer connecting the metals and of course if you push two balls together hard enough you break that super thin layer and make a connection which means if you put too many balls in the bucket their weight might push them together too hard and they never disconnect but what voltage Falls across this coherent cop of mine I connected the probe across it to my scope and hopefully will capture something ready oh there's something let's get closer wow this is large so these pulses are like 40 volts of very high frequency voltage across coherent let's see if you can figure out the minimum required to turn it on they could be as small as 10 volts that's nothing with only 10 volts across so many balls it means we only need like a volt or two to break down that super thin layer between the balls and that's why it never disconnected when I had 120 volts across it the voltage was too high let's see if you can try this with a DC Supply okay I replaced the battery with a power supply and put a series resistor with the LED so it won't blow up now let's see what maximum voltage across the cohero we can read before it breaks down we'll raise the voltage slowly it's 1.4 volts now thing for oh turn on at around four and a half five volts that's very little voltage but there seems to be different levels of connectivity too let's just check its resistance okay just the resistance of the coherent we do one click 0.4 ohms almost pretty small resistance rolls 350 ohm and if you click again to all so every click makes the connection a bit different here's one from four a little bit closer better connection even closer even better connection so stronger pulses make better connections wow such small voltage is required to break that isolating layer must be extremely thin what a ball breaking phenomena and I guess that required voltage changes significantly with the weight and volume and material and environment and whatever but we need a pulse of higher voltage first to make the connection and then the 3 volt power supply to maintain it do we need a power supply to maintain the connection I connected my 3 volts battery back and the LED is off and disconnected so that there is no voltage across the cohere of course if I connect it back and click the LED turns on but if I disconnect and click and reconnect the LED turns on I disconnect reconnect disconnect click connect turns on great so the cohere creates a stable continuity without a need of a power supply well that's great what why do we have like 10 to 40 volts of Spike across the cohere don't you have like a three volt Supply across the whole circuit shouldn't that clamp the voltage down to three volts aha see these wires act like antennas picking up the energy but they are also inductances isolating these high frequency Pulses from the battery so we get high enough voltage to cohere our balls so it's like wireless communication and that's what they used it for ages ago they placed smaller balls or metal particles between two contacts and if there was a strong enough electromagnetic pulse it would close the cohere they would sound the bell and bang the cohere to disconnect it and that's how the early Morse code machines worked I think which means if I add some antennas to my setup I should be able to increase the range here I remove the metal cover of my lighter so you see one side and the other side of the Piezo igniter that creates high voltage difference across it I here I have like a meter and a half of a wire that I connect to one side of the igniter and another like two to three meters of wire that I'll connect to one side of the cup now if I click my igniter there you go let's see how far we can go oh put it all the way back here so we can see it in action maybe hang the wire somewhere up here for better reception okay let's give it a try from here oh it works how about here no problem back here easy even a bit further ah there you go I don't think it'll work this far no I have to go closer yeah from here it's like one two three four five six seven eight nine meters away for longer distance we need better filtering resonance circuits bigger antennas and all for what Morse code and what is this good for nothing more than a party trick I mean in this day and age we can probably do much better than balls and it's not super reliable either it just needs one tap to disconnect imagine you're on a fast boat banging on the water trying to receive a message [Music] what is she saying wants to eat Shawarma comma dine out she says each and die foreign [Music]

Channel: ElectroBOOM

Views: 1,123,903

Keywords: educational, electrical, ElectroBOOM, science, electronics, engineering, entertainment, equipment, measurement, experiment, mehdi, mehdi sadaghdar, arc, mishap, physics, Sadaghdar, test, tools, circuit, funny, learn, shock, spark, discharge, coherer effect

Id: VMkdnj698-0

Length: 12min 39sec (759 seconds)

Published: Sun Sep 03 2023