Professor99
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Professor99 01/05/2019
It’s good value for the price, but keep your expectations reasonable. There is no spring suspension like some others; the power switch is not wired up (and soldering it will be a bit of a challenge due to tight space); and the motors run at different speeds due to construction irregularities and you will have to compensate with your motor driver. On the plus side: the overall size is good so you can use it as a base for a larger robot or tank or robot tank, the motors seem strong, and it feels solid enough to carry some decent payload.
スマートロボットタンクシャーシ追跡車DIYキット
US$23.99 US$28.99
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5個のGeekcreit MAX7219ドットマトリックスLEDディスプレイモジュール4つのディスプレイ
US$31.99 US$38.99

Q: How to overcome mirror text problem coming on display????

尋ねた Arman Qureshi に 2019-03-05 11:38:26

Professor99 Use the Parola library for driving this device (which you probably are already doing). Get the latest version because it’s easier to fix this problem with the latest version. Then follow the advice of ATHIELEN in the review of the 1 piece MAX7219 product. He says to download the “https://github.com/MajicDesigns/MD_MAX72XX” library into your Arduino IDE. Open the “MD_MAX72xx_Test” located under Examples. Change line number 25 from “#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW” info “#define HARDWARE_TYPE MD_MAX72XX::FC16_HW”. You can read the explanation of the different hardware setups in file “MD_MAX72XX_lib.h” located in the library. Do not make any changes to “MD_MAX72XX.h” in this latest version (which is the fix for earlier versions of Parola).

2019-03-10 11:37:44 役に立つ (1)
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Professor99 06/03/2019
Product arrived quickly and undamaged. I tested all three and they work fine. Note that they come with the Lithium batteries as they should. All good!
Arduino用3個DS3231 AT24C32 IIC RealタイムクロックモジュールGeekcreit-公式Arduinoボードで動作する製品
US$5.63
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Professor99 19/12/2018
Ordered 3 of these; tried one and it works nicely. Don’t know how much current I can put through it but it worked great for my project.
ミニDC-DC 0.8-5VからDC 5Vステップアップブースト電源モジュールボード
US$7.99 US$9.99
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Professor99 07/11/2018
The picture shows small crystal clear LEDs but the ones I received are larger cloudy LEDs. They cover most of the circles that you see around the LEDs in the picture. However, the LEDs that I received look more like real traffic lights so that is not a problem. In addition, the specifications say that these are 5v LEDs. However, I tested them with 3 volts and they were bright, so I suspect that 5 volts would destroy the LEDs. So I am using them with about a 90 ohm resistor in my Arduino project and they work great.
LED信号機モジュールArduino用電子ビルディングブロックボードGeekcreit-公式Arduinoボードで動作する製品
US$5.99 US$10.99
1
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DIY 2 * 18650バッテリーキットは、iPhone 8 X Plus用のLED電源バンクケース充電器Xiaomi 6 S8 S9 Note 8
US$3.69 US$4.99

Q: is it's battery come with it

尋ねた Vishnu に 2017-12-03 12:51:16

Professor99 No batteries come with it; you need to order 2 of the 18650 batteries recommended. Ensure that they have a flat top (and bottom) so that they fit properly in the case.

2018-06-28 11:19:34 役に立つ (0)
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Professor99 11/06/2018
I bought two of these as they are perfect in every way. Size is nice (not too small not too big) brightness is great (2 settings) functions work well price is great. Just be advised that you have to have your own 5V power brick to plug into the provided cable if you want the display to be active all the time. But if you’ve had a few cell phones that have died keep the charger adapter for the clock and away you go.
DigooワイヤレスUSBミラーアラームクロックLEDデジタルサーモメーターテンプレートナイトモードブラックDG-DM1
US$15.99 US$19.99
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Professor99 11/06/2018
When I first turned it on I was very impressed with the quality of the light show. It was pretty bright and very interesting especially considering the reasonable price. It ran fine for a few minutes with no problems. When I turned it on the second time it went “pop” and didn’t light up or rotate the lens anymore. My electric service is 120V so it’s not due to a voltage problem. I advised Banggood service but they asked for a picture of the box (which I still had) and the original delivery package and label (but I didn’t have this anymore). Normally they will help if you meet their conditions and requirements so I guess this is my fault. So I don’t have a working light but I’ve learned something.
E27 3W RGB LEDバルブカラフルな自動回転ステージディスコライト85-265V
US$5.99 US$7.99
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Professor99 06/04/2018
This light worked very nicely. As per the other reviews the light is not bright like a regular bulb. However it was plenty bright enough to colour the room nicely. I ordered two of them and I was pleased to see that with one remote you can control both lights in synch at the same time. For me this was and advantage. I suspect that by shielding one light from visual range of the remote you could control them independently if you want. Many of the colours and functions are nice.
3W E27 LED RGBマジック電球 16色 リモートコントロール AC85-265V付き　調光可能
US$5.51 US$7.10
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Professor99 04/03/2018
This device has all the features I wanted and more. It’s nice looking small (but big enough to read from across the room) and bright (unless you don’t want it bright and put it on the low setting or have it automatically dim in the evening). If you want the display to be on all the time use the supplied USB power cord; note that you must the supply the power brick but you likely already have a collection from all the cell phones and tablets you’ve owned over the years.
DigooワイヤレスUSBミラーアラームクロックLEDデジタルサーモメーターテンプレートナイトモードブラックDG-DM1
US$15.99 US$19.99
1
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