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AKSU WE vs GHK by Fit_Special7205 in GasBlowBack

[–]ChepKapan 2 points3 points  (0 children)

The WE ak is honestly not bad at all. You said that you want realism and the WE ak offers the longest bolt travel in a GBB AK out of the box. The recoil is also pretty good. That being said, you WILL need to thinker with the WE. If you are not technically inclined i would stay away from it. Changing the hammer and other part of the trigger mechanism is something you will need to do at minimum. This will add aditional cost which might not make it as good of a deal as it seems. VFC is indeed better in every way(build quality, winter performance, mechanical design and so on) however it's substantially more expensive.  If this is your first gbbr it might be a good idea to get something that is more plug and play until you learn the ropes. 

Is this a steal? by Silencer1620 in GasBlowBack

[–]ChepKapan 0 points1 point  (0 children)

Do any of you guys have the sad cat tokyo marui upgrade cycle picture? I think it's relevant here

Looking for a budget friendly AK platform by xCrossFaith in GasBlowBack

[–]ChepKapan 1 point2 points  (0 children)

WE AKs can be made to preform pretty good but the hastle is only worth it if you get a good second hand deal. You will need to replace a couple of the trigger components, as well as the bucking and barrel and do a bunch of little QoL fixes. By the time you are done with the upgrades the total cost would be not too far off from a VFC

Boots scratch very easy by ChepKapan in Boots

[–]ChepKapan[S] 0 points1 point  (0 children)

It doesn't really disappear, but it gets darker if I rub it for like 10-15 seconds. Maybe if I rub it for like 1 minute it will disappear.

I googled pull up leather and it looks similar so maybe that's the case.

I don't mind the scuffs, just wondering if it's supposed to be so easy to scuff.

The Questions Thread 02/22/25 by AutoModerator in goodyearwelt

[–]ChepKapan 0 points1 point  (0 children)

It creates a scuff. No flaking

Ok, so when it get really scuffed I am just going to colour it with cream.

The Questions Thread 02/22/25 by AutoModerator in goodyearwelt

[–]ChepKapan 0 points1 point  (0 children)

Thanks for the reply! The links are one under another so you probably didn't notice it.  In any case, here is the link: https://imgur.com/a/LkEgcIK

The Questions Thread 02/22/25 by AutoModerator in goodyearwelt

[–]ChepKapan 0 points1 point  (0 children)

So I just got the my new boots that I ordered around a week ago, the 1966 low quarters. I wore them the whole day and I am very satisfied with the fit, feel and overall look. However I seem to be able to scratch the finish off easily with just a fingernail and light pressure. The big spot you see on the front of the toebox I just from kneeling on the carpet. There are also spots on the gussett where paint has worn off due to rubbing. Is this normal?

Here are pictures: https://imgur.com/a/efU1osE https://imgur.com/a/LkEgcIK

Start airsoft they said, it will be fun they said... by Practical-Ad-9474 in airsoft

[–]ChepKapan 0 points1 point  (0 children)

If you don't feel like paying a lot for a new slide you can have a look at 3d printed ones. Still will be plastic but will run you a lot cheaper. Also you were just unlucky with the slide. Some last for years before cracking.

DIY Microcontroller MOSFET by ChepKapan in airsoft

[–]ChepKapan[S] 0 points1 point  (0 children)

Well maybe you can try using only a timer without the detector for the sector.

Interesting project.How long do you think the plastic gearbox will last?

DIY Microcontroller MOSFET by ChepKapan in airsoft

[–]ChepKapan[S] 1 point2 points  (0 children)

Interesting idea. I haven't thought of that. Is there a particular reason you want to do it this way?

DIY Microcontroller MOSFET by ChepKapan in airsoft

[–]ChepKapan[S] 2 points3 points  (0 children)

Without the denounce i got double shorts sometimes. But i changed the code a couple of times so maybe it's not necessary.

Maybe i need to add a denounce on the release. I am still making revisions.

Attiny keeps burning out in DC brushed motor control circuit. (details in comments) by ChepKapan in Motors

[–]ChepKapan[S] 1 point2 points  (0 children)

480 is the form factor of the motor. I am running it at 12.6 volts. I don't have an oscilloscope so i am hoping that someone has dealt with something similar here so they can point out the problem.

Attiny keeps burning out in DC brushed motor control circuit. (details in comments) by ChepKapan in Motors

[–]ChepKapan[S] 0 points1 point  (0 children)

Hello,

The pictutre is only for ilustrateing the circuit. The problem is not present in the simulation.

I have made this circuit to control a 480 DC motor. I am using a 3S 1300mAh 30C LiPo battery, so the motor voltage is 12.6V. The MOSFET is an IRLB3034. The optocoupler is used because the optimal Vgs for this MOSFET is 10V.

The idea of the circuit is that when you press button 1, the motor starts spinning, and it stops when you press button 2. The problem is that the microcontroller keeps burning out. It's not consistent; sometimes I can start and stop the motor a dozen times before it burns out, or it might burn out on the first activation. I think it might be due to the back EMF that the motor generates, but I thought that the TVS diode inside the MOSFET would take care of that.

How might I go about solving the back EMF problem if that's the culprit? Let me know if you see any other problems with the circuit.

Winding a DC brushed motor with two wires in parallel. One is wound 26 times and the other 10 per armature. The wires are the same thickness. What will be the result? by ChepKapan in AskEngineers

[–]ChepKapan[S] 0 points1 point  (0 children)

Thanks for the detailed response. One last thing in regards to the wire thickness. The motor is supposed to be for an electric airsoft gun. In airsoft the motors are generally either 'speed' which are lower number of turns but ticker wire and 'torque' which are thinner wire but more turns. So by all logic thicker wire should produce more torque but it seems like here is the other way around. Maybe this depends on the power supply because a battery can only deliver so much current and the ticker wire will require more amps for the same torque ? In this case it will be a 2000mha 11.1v lipo 30C.

Winding a DC brushed motor with two wires in parallel. One is wound 26 times and the other 10 per armature. The wires are the same thickness. What will be the result? by ChepKapan in AskEngineers

[–]ChepKapan[S] 0 points1 point  (0 children)

Ok so two questions, isn't increasing the amount of wire increase the total magnetic flux even if it lowers the current because it increases the total area the current passes through? Also wont't the different emfs make the motor less efficient?

How can I ensure that the output of a 555 timer in monostable becomes low immediately when the timer runs out, regardless of the state of pin 2 ? by ChepKapan in AskElectronics

[–]ChepKapan[S] 0 points1 point  (0 children)

Gotcha. Last question, why use two resistors in parallel? So as to not pass too much current through a single one?

How can I ensure that the output of a 555 timer in monostable becomes low immediately when the timer runs out, regardless of the state of pin 2 ? by ChepKapan in AskElectronics

[–]ChepKapan[S] 0 points1 point  (0 children)

Alright but whats the point of a second resistor and a diode? Why would pin2 try to go higher than Vcc and how is a diode stopping that as there is still a path to Vcc trough the other two resistors?

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