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It should be something about the serial communication. If the baud rate is not right, it usually show a scramble text, and also i already test to change the baud rate the cameraWebServer example use baud rate , it is still not working tried to press the rst button in each board everytime changing the baud rate.

Also already double check the com port. So I tried your suggestion: After seeing the dots in the arduino console I pressed the IO0 button kept holding it down and then pressed and released the reset button on the camera board not on the programmer board …but no luck. The behaviour is the same for the two boards. I tried different cables also. The programmer worked fine for me with the boards that came with it. For other boards, I needed to do that with the buttons. But I was always able to upload the code.

Can you try selecting another board. You can try the ESP32 Wrover module. Regards, Sar. Flash button or DTR signal for activating the bootloader work well with all the boards. That lack-of-reset-pin issue was mentioned by bitluni, who made one of the first kinds of these programming boards that I saw, anyway, last year , and that issue is mentioned in his description on the product page here: tindie.

Hi Marco Sorry I am a bit late replying. I had a similar problem — there seems to be some incompatibility between the boards. At the moment I have just these boards but monday I will recieve a FTDI programmer so I will try with that one to figure out whats wrong. Thank you so much for this! I could upload a simple blink program, and it would run until I started the serial monitor. In the serial monitor you can red the ip address.

However, the camera interface and RMII share some of the same pins by default. I experienced similar issues and trued several of the suggestions — seemingly not working. But after all this, I just put a 4Gb micro SD card in the slot and wham!! Using Arduino IDE and just compiling and upload — no need to hold down the boot button.

Very handy piece of kit for uploading but no GPIO pins exposed so you need to move it to a breadboard after uploading to try the projects out. Hello everyone and without the intention of offending anyone, I have to say that the esp32 CAM is a crappy camera if or if it hangs every 2 x 3 it works when a fiasco feels like it.

Jumper still has to be in the 3V3 position and all other voltage levels must be 3. I bought espcam and its programmer. But it is not a ai thinker. I get these errors after loading the program. Either does not recognize the camera or gives this error. What should i do to make it work.

Error code: Camera Ready! Camera capture failed. I had the same problem with one ESPCam, just reseated the little ribbon cable and the camera started to work. Gived a try. Hello Sara et al! I think I already found my answer by reading between the lines in a couple of comments. But my question is do you need to have the esp32 cam MB programmer module attached to the camera module during operation? Thank you. No, you can detach the programmer after uploading the code and power the board as you wish.

I kind of remember having to add a capacitor when i get these type of errors on these cams. I am not saying the cameras are bad yet , they may need this added capacitor. Thanks for all the great info you have always provided. Hi Richard. This causes it to go into an unusable reset state whenever you try to connect using these apps.

Simple question. That would be useful. Then release both and the upload starts. Works every time so far. Hence the request for a schematic. I think there must be an incompatibility between some of the cards and the clue may be in the error message below. A fatal error occurred: Timed out waiting for packet header A fatal error occurred: Timed out waiting for packet header. But after many years, I have a much better way of doing it, check out the photo to Pencil Drawing tutorial here.

We are going to create the fine lines of the outline as well as the smoother shading that is characteristic of a pencil drawing.

Move the amount slider just enough so that we get a nice thin, but clear outline around everything. We now have a nice outline, but we want to add smooth shading, this is where other tutorials usually stop.

Change the Blending mode to Darken, You can apply blending modes to groups as well as individual layers. Select the top layer group and add a Layer Mask, but wait. We want an inverted mask Hides everything. You will now have a black mask. With the mask selected, paint on the image and add the shading where you need it.

Congratulations if you have completed this Photoshop Pencil Drawing tutorial! You can get my free Layer Blending modes ebook here. Keep up the great work Colin — very many thanks. Do you remember the Extract filter in Photoshop 7? Now we have got the new Select features — wow! As always , I find your tutorials very interesting.

Thank you Colin, always enjoy and learn from your tutorials. You make things easy to follow with your very concise explanations. Thank you so much for sharing! Northern California. Love your tutorials. One of these days I will implement some of them! Thanks so much. What a great tutorial! Not sure that I quite have the artistic eye to understand the subtle details. I could stop at the first blending.

However, I will play with this technique with an upcoming project and see if I can upgrade my artistic sensibilities! Thank you for the tutorial. The additional gives you the subtle shading.

Fabulous Tutorial, Colin!!!!! You really do your homework and I really appreciate your Geat work. Great tutorials. Advise please. Great Tutorial. I worked along with you. Your instructions are very easy to follow and execute.

Thank you!! Look 4ward to receiving them each week. South Aust, Australia. Hi Colin, Thank you for your weekly tutorials, I find them very informative and more importantly, very easy to follow for a novice like me. Keep up the good work!!!! From Vancouver Canada. Regards, Sara. Then, take a look at the examples on the LoRa library. They provide simple examples on how to send and receive data.

Here are some resources: — Arduino LoRa library: github. Hi Guillermo. It is probably not properly connected.

Make sure you double check all your connections. This example exchanges information between the sender and receiver. You just need to modify the code to include the sensor readings and sen them in the packet to the receiver.

Then, on the receiver you just need to control the relay. I think it depends on many factors. Hi Sara, than ks for youe replay. Hi Salvatore. Yes, I talk about that in the tutorial. That way you only receive packets from your devices and ignore other devices in your surroundings. Hi Amira. NRF24L01 uses a different communication protocol. You need the RFM95 module for this tutorial. That is probably a connection problem. It is probably a wrong connection or insufficient power supply.

I hope this helps and good luck for your final exam. I have sent data from one lora module to another and now i want to upload the data received by the next lora module to the cloud using esp32 nodemcu.

Is there no password or something like SSID? How can the both Transceivers recognize each other? Hi Alexander. You can use a syncword to ensure you only receive packets from your sender. Hello Sara, I have a problem with the receiver.

After a while it hangs up. I need to reset it to receive packets again. Did you encounter this problem? Hi Bernard. Maybe you can add a condition to check if the packet was received. Regards Otto. Hello Otto, thanks I will try that and let you know about. But I fear this will not solve the problem because i use a good stabilised and filtered PS for the esp But lets try!!! Sara, thanks for the command. I do a restart every 30 packets. This is NOT trustable. Seem to get sender running at first but when l add a receiver l got a header file error.

Any ideas. Hi everyone! It may be some problem related with the antenna. Make sure you have a proper antenna on both boards and that they get enough power. Not sure exactly how to contact you directly. May I please have an e-mail address for you? I sent a detailed e-mail to you or perhaps it went to Rui, more than a week ago and have not had a reply. It relates to the need to have some e-courses on LoRa. Hi Bob. If you sent an email to the support, Rui will receive those emails.

However, he receives a lot of emails every day, and it difficult to keep up with all the emails he receives. Nevertheless, he tries to answer all emails, but it can take some time. But it is not a dedicated LoRa course, so it should not be suitable for what you want to do. Sara, Thanks so much for your reply. I am now interested in doing more with the LoRa technology here in the United States.

My interest is low power long range, low data rate communications. LoRa is currently the prime technology that I am aware of to allow such communications to happen. Therefore, this is driving my desire to master this communications protocol. I hoping to receive them soon so I can continue. I hope you and Rui and company can see that LoRa is a perfect technology for the future and furtherance of the IOT industry.

With that said, I encourage you to think about a dedicated course encompassing this technology. It seems that it is very much needed, at least here in the US where the technology has not caught on as it has in Europe. Thanks for sharing your thoughts about this subject. At least, in a near future. But, we plan to write some more tutorials about this subject.

Can you help with this product, to increase coverage!! Looking online and it looks like others are having same trouble installing ESP In your last picture you have an oled attached for display information but neither the schematic or the code reflects that. Regarding my comment made on Nov. I did, however, make the installation using a link from Github instead of the link to Espressif. As time permits, I will look at why there was a problem with my older Win-7 computer to install the TTGO board manager on it.

Yes, it is possible. Thank you very much for this post. I just ordered some rfm95 modules from ebay to try your code. I think that some messages that reach Lora gateway receiver in the same time will be lost???

Do you have any idea how to deal with such a situation? Thanks a lot Zak. Hi Zakaria. Thank you for your comment. I rechecked all the connections everything seems fine…. Is there any need for level converters, like Arduino Mega…? Are you using a setup like ours? Or are you using a board with a built-in lora chip?

So, that error is probably related with wiring. Check all the connections, sometimes one wire that looks good is not making a connection.

So, check with a multimeter. I would like to respond to Ace January 9, at pm. Recently, I started having the same type of problem. I consulted with Adolfo Mondragon an engineer in Juarez Mexico. After some time or after some number of times through the Arduino compiler these extraneous characters started to cause the code to fail. In my case I started getting a error message after some time even though it may have worked at first.

In my case I had to use a text editor that showed all characters. I then proceeded to delete the extraneous characters. Thanks for pointing that out. Thanks for sharing that, many others might have the same problem. I found out that if you are sending from a Heltec board or maybe others and receiving on a RFM95 equipped board using this code you need to make sure you use the same spreading factors. Where do the PIN numbers come from?

Are they hard-coded in the LORA library used? Because I cannot find any reference to them in the source code. Hi Jens. Yes, you can use other pins as long as they are referenced on the code. If you want to use other pins, you need to create an SPI instance on those pins. But thanks for explaining the issue that definitely existed before using your setup and the nice tutorial! I used a new radio chip and connected that. And it needs to be a bit more robust when the mailman is forcing something in there with full force the next time.

Suggestion: Maybe you can add RSS capability to your website. Thanks for the suggestion. Did you really just implement the RSS feed or was it there all the time? First of all, thank you both so much for these tutorials. As a beginner to the world of electronics, I really appreciate how clearly you guys explain everything. I did want to ask you one question though.

After using the LoRa library by sandeep mistry in the past, I came across the Radiohead libraries which can also be used for transmission of packets. It seems that when I use the Radiohead libraries on all devices, the RSSI is much stronger and I can get the packets over much larger distances! However, the Radiohead library does not like the ESP 32 and there are many strange unknown characters and errors that appear when I try to use it.

I was wondering if you have tried to use the Radiohead library before, if you have heard of any problems like this with the ESP 32, and how I might fix it. Hello, congratulations for the great articles … Could you help me, I have to read 5 digital keys on a esp32 with display visualizing the number of keys that are closed , these states must be transmitted to another esp32, every 3 minutes.

This receiver esp32 should, according to the number of closed switches, activate a relay. I live in Brazil AU I am using heltec ESP32 lora. My sender and receiver device both are heltec ESP In this case I want to connect multiple lora sender with one lora receiver. Similar to this project that utilises an ESP32 github. Also wanted to say thanks for the fantastic resource that you guys have made available — I think my starting point needs to be your electronics for beginners course! I am also working on a water meter project, Lora is a good idea if the meter is too far away for your wifi.

I have seen somewhere an article on image processing that could read the meter. I would be interested in collaborating with you and others on this.

I tried sensing the rotating magnet in my meter with a hall effect device, but signal is too weak for my brand of meter. I still need to investigate a bit more to see what is possible. I am going to order a ESP32 and have a play around in spare time, if I get anywhere I will send a follow up post, more than happy to share findings.

Regards Said. It depends on a lot of factors. But it greatly depends on the environment. I have a Dragino outdoor gateway with several nodes connected. If yes please guide me through that.



Sketch 55 tutorial free. Mac Releases


There is no narration and no tips, but it is fun to watch and also informative to see the range of values and textures that give this drawing a sense of space and place. Especially for a scene drawn from imagination. The artist has other landscape videos, including a real-time version of this drawing, so if you enjoy this video, it will be worth your time to watch some of his other videos.

Most videos are under twenty minutes and many are under ten minutes long. This live stream video from Lisa Clough of Lachri Fine Art walks you in real-time through the process of drawing a soft background using graphite powder.

This is the first video in a series of live streams covering this large-ish graphite portrait. Finally, in the graphite category, a video for fun.

See how to create two small drawings with oil pastels in this Lets Create Something video. The first demonstration is on smooth paper. The second paper is pastel paper, so you can also see how pastel preforms on different papers. Syndia Art gives you basic tips on getting started with oils pastels. The video is real-time and narrated, but the artist also demonstrates the drawing process.

She also has a playlist of beginning tutorials covering a wide range of subjects for beginners. You can check out that playlist here. Get started drawing with pastels with this short, time-lapse video with captions.

The supplies are listed throughout the video and include colors and blending tools. This is a project you can do on a budget, but that will still give you a good idea of what oil pastels are capable of. The process includes a few other media such as watercolor and graphite.

Ready to take your pastel work to the next level? Then this video by Holly Saunders is for you. The artist talks about the medium in general, why she loves them, and how she uses them. She also demonstrates her most often used techniques with a landscape with buildings on canvas with primed with acrylic gesso. Wildlife artist Jason Morgan recommends the supplies and tools you need to get started with soft pastels if you want to create realistic pastel drawings.

He begins with the absolute basics just to discover whether or not pastels are for you including a link to a Patreon project that can be completed with 12 pencils and a piece of paper. For the advanced pastelist or any artist who wants to advance with pastels, Jason has dozens of tutorial videos. Most of them deal with specific subjects such as drawing whiskers, feathers, or fur. Pastels can be a confusing medium. Are they interchangeable?

What about pastel papers? Does it really matter what you use? Susan Jenkins of Monet Cafe answers those questions and more in this video.

The Art Tutor presents this short video from artist Michael Howley to introduce beginners to pastels. The focus of the video is soft pastels, but the difference between oil pastels and soft pastels is briefly addressed. The rest of the video shows how soft pastels, hard pastels, and pastel pencils compare. Artist Will Stoller of Unmask Art shows five basic drawing techniques for pastel beginners. He also demonstrates each technique as well as describing it. As well as being effective, some of this tips are amazingly fun.

Colin Bradley shows you in real-time how to draw a Jack Russell Terrier using only nine pastel pencils. The video begins with a presentation of the supplies and tools used, then proceeds with the dog portrait itself. Throughout the process, the artist talks about his methods, possible problems and fixes for those errors. This video features another animal portrait on Clairefontaine Pastelmat.

Master pastel artist Lyn Diefenbach is the guest artist in this video presented by Colour in Your Life. Rather than simply being an interview video, this video features a real-time tutorial of drawing a super realistic rose portrait. The video is mostly real-time with Lisa talking about her thinking processes, drawing methods, and other art-related things.

Finally, here are three of my favorite pastelists who specialize in animal art. This tutorial from Mary Doodles is all about using liquid ink and dip pens to create art.

Mary describes the supplies she uses from the type of ink to pens and brushes, and papers. She also shares tips on using dip pens—what to do and what not to do. She also talks about techniques for creating different types of strokes for drawing and shading.

Matt Fussell The Virtual Instructor demonstrates how to draw trees of different types with pen and ink. This real-time video begins with two ways to draw contours, then addresses the process of making those contours look three dimensional. Are they really interchangeable? Cassandra Hanley not only demonstrates using an Inktense under drawing, then layering colored pencil over it; she shares tips on what to do when a drawing goes off course.

One of the more popular mixed media artists on YouTube is Marcello Barenghi who combines air brush, marker, colored pencil and more to create hyper-realistic artwork. His subjects include such varied and everyday things as candy wrappers, soda bottles and money. Enjoy it, then make sure to check out some of his other speed drawing videos. Unsubscribe here at any time.

General Drawing Videos 1. Think Again! How to Draw Faces Rapid Fire Art artist Darlene shows how to draw a male and female face in this time-lapse, voice over tutorial. How to Shade with Pencil for Beginners Click here to watch on YouTube Darlene is back again to explain why you need to understand how to shade. The Basics of Charcoal Kara Bullock talks about the three types of charcoal and the differences between them, as well as other basic supplies. Intro to Charcoal Drawing — Easy Things to Drawings Click here to watch on YouTube The artist at Easy Things to Draw offers this introduction to charcoal for artists who have never before used charcoal but would like to.

How to Draw Basic From: Cube with Charcoal Click here to watch on YouTube See how to draw a basic cube shape from scratch and develop the values until it looks three-dimensional in this real-time video. How to Shade, Blend Realistic Skin for Beginners In this video, artist Aditya Bora demonstrates how to create value in skin by shading, blending, and erasing. Twelve Genius Drawing Hacks for Colored Pencils Click here to watch on YouTube Artist Kirsty Partridge shares a dozen tips to help you make your colored pencil work more professional and finished looking.

How to Draw Trees — Simply Click here to watch on YouTube Paul Priestly shows you how to draw and shade trees using a very basic method of looking for the large shapes of each particular tree type, then adding the values that turn those shapes into forms. How to Draw Realistic Textures using Pencils — Wood, Brick, and Metal Click here to watch on YouTube Dan Beardshaw shows how to draw three of the most popular basic architectural textures in this mostly real-time, narrated video.

Drawing a Realistic Snake in Graphite! Pastels for Beginners — What You Need to Buy — Supplies Click here to watch on YouTube Wildlife artist Jason Morgan recommends the supplies and tools you need to get started with soft pastels if you want to create realistic pastel drawings. Click here to watch on YouTube Pastels can be a confusing medium. Pastel Eye Candy for Animal Lovers Finally, here are three of my favorite pastelists who specialize in animal art.

Other Dry Media Tutorials Inktense, an Alternative to the Inks? Elephant in Inktense and Colored Pencil Click here to watch on YouTube Cassandra Hanley not only demonstrates using an Inktense under drawing, then layering colored pencil over it; she shares tips on what to do when a drawing goes off course. Its length becomes fixed. Both its geometry and length are fixed. To exit the line tool and repeat it again which of the following shortcut option can be used? Press Space bar key. Double click middle mouse wheel.

Double click left mouse button. To apply dimension constraint on two circles from circumference to circumference which of the following shortcut key can be used? What is the polygon type in the following image?

Inscribed circle. Circumscribed circle. Is it possible to apply geometric constraint like horizontal and vertical on Spline handles? Solidworks – Sketching. Part 3 — Modifying sketches. What will happen when you extend an arc using extend tool? Arc will extend into a straight line up to the next boundary.

Arc will extend in arc length direction up to the next boundary. Is it possible to use cap ends feature of offset tool on closed sketches?

Which of the following checkbox should be selected to convert the main geometry into a construction geometry after creating an offset? When making a sketch copy which of the following option maintains the constraint of the object to be copied? Keep relations. Is it possible to add a negative rotation angle value when rotating a sketch entity?

Solidworks – Modifying sketch. Part 4 — Part modeling. Which of the following feature can be used to extrude the sketch along the sketch boundary only? To extrude the sketch marked A up to the plane marked B which of the following option can be used? Up to next. Up to vertex. Up to surface. Which of the following option will let you create a fillet of variable radius along the same edge?

Multi radius fillet. Variable size fillet. Asymmetric fillet parameter. Full round fillet. Constant size fillet. Face fillet. A chamfer as shown in the following image is added to the edge of 3D part. Which of the following options of chamfer tool will maintain the cylindrical shape even after adding the chamfer? Tangent propagation. Flip direction. Select through faces.

Keep features. Solidworks – Part modeling. Part 5 — Drawing tools. To make a reference plan two intersecting planes are selected, what will be the direction of final plane thus created?

It will be parallel to the first plane selected. It will be parallel to the second plane selected. It will be at the angle bisector of the two planes. Solidworks will fail to create this type of plane. Using which of the following option you can check the physical properties of a body like mass and density?

Design Study. Mass Properties. Geometry analysis. What will happen to the mass property of that body?