51–60 of 66 posts
A good 2.5 inch RC car is 30 bucks on AliExpress now, A standalone 5.8 GHz analog camera is 25 bucks. Just for those that may be more interested in the outcome than just a fun project to do
Does anyone know if there is a car kit where you could just install an Android smartphone and have it be the camera + brain?
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FPV today is largely using ExpressLRS[0], an open protocol for running FPV quads' control links (also using esp32 usually) Video for FPV quads on the other hand is divided: some use analog (mostly because when you lose signal, it's a gradual loss rather than complete loss + a reconnection process), while others use 802.11-based communication which is actually quite competitive. Walksnail Goggles for example use 802.1…
I will add for those who haven't tried these, as it usually doesn't come across in verbal comparisons: Digital FPV (like DJI's system) looks vastly better than analog. I think the best comparison is: Digital looks like a modern movie, youtube video etc, and analog looks like CCTV footage from the 80s. I will also clarify on ELRS: It uses ESP32, but it is a thin wrapper around Semtech LoRa (~915Mhz and 2.4Ghz) SX128x…
before you get a ESP32 CAM (I love em) consider one with an external antenna it may be wise to read this https://www.reddit.com/r/esp32/comments/r7kqtt/esp32cam_supe... I got fairly bad frame rate until I tried some of the advise
Resoldering the 0 ohm resistor was like an adventure, but somehow managed to connect the correct pins. The end result looks like following:
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I will add for those who haven't tried these, as it usually doesn't come across in verbal comparisons: Digital FPV (like DJI's system) looks vastly better than analog. I think the best comparison is: Digital looks like a modern movie, youtube video etc, and analog looks like CCTV footage from the 80s. I will also clarify on ELRS: It uses ESP32, but it is a thin wrapper around Semtech LoRa (~915Mhz and 2.4Ghz) SX128x…
I heard people flying analog also use quite a bit more transmitter power than allowed for non-regulated devices to keep things manageable. Do you have any reference what's possible with digital when staying in the allowed regime?
With digital, you can go from 30-50km with the proper equipment, noise free environment etc... It looks like the video for that has been taken down. But you can find the discussion here: https://greyarro.ws/t/digital-fpv-dji-vs-hdzero-vs-orqa-vs-w...
The "allowed regime" also differs based on where you live. Iirc 25 mW is the maximum permitted power in Europe. Have to double check. That gives you about 100-500 meter range in an open area.
Cool! I've made an ESP32 powered RC tank on tracks, controlled with a PlayStation 4 controller over Bluetooth. The basic software is very easy to start with, about 20 lines of C using a library for the Bluetooth controller. From there I've added features for easier control. Using two sticks for two tracks works at low speed, but the thing goes close to 20 km/h (I've used two drone motors for it) so then you need a di…
I've never looked into RC builds before - how are they controlled? Do you connect the PS4 controller directly to the esp?
Tangential, I want to build a camera based fish feeder, is there any hardware that can shake fish food pellets and can I use my python knowledge directly?
[0] https://circuitpython.org/downloads [1] https://www.adafruit.com/category/943