hAKi
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hAKi Seriously?Need instructions for this camera?

superturbo 25/01/2018
Got the camera. It looks good and has a lot of mounts but mine didn't come with instructions or any link to a site to download instructions from. So deducting one star from value and two from quality because I can't safely use it without any instructions.
G2 Ultra HD 4K WIFI Action Camera 2 Inch LCD Sport DV 170 Degree Wide Angle Lens
US$44.60 US$73.99
0
Comments (3)
hAKi 16/12/2021
I'm a little disappointed. Signs for units are decidedly too small! Temperature measurement is inaccurate. At -18 degrees Celsius the instrument shows +5 degrees, at 0 degrees it shows +6 degrees, at +6 degrees it shows +14 degrees and at 98 degrees it shows 103 degrees. True RMS is a story in itself. With open terminals it shows some completely random values and even with closed ones it does not show 0. It works satisfactorily only for sinusoidal signals, with rectangular ones the error is already around 20% at 50Hz! Useless. Interestingly, I didn’t notice this nonsense when measuring the current.
ANENG AN870 Auto Range Digital Precision Multimeter 19999 Counts True-RMS NCV Ohmmeter Tester
US$33.99 US$58.99
0
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hAKi 23/04/2020
Excellent product, works as expected, I already order another one. The internal 25MHz reference is not very precise and stable, I recommended to use an external 10MHz reference to get a very precise frequency. But altogether, I am very pleased with product!
35M-4.4GHz PLL RF Signal Source Frequency Synthesizer ADF4351 Development Board
US$22.99 US$35.99
1
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Comments (0)
hAKi 08/05/2020
Great thing, I ordered another one to also make a RF generator for a friend. In the first case, the internal reference deviated a little, but in the latter case it did not. Since the temperature stability of the oscillator is satisfactory, there is a simple solution. The oscillator frequency is measured and this value is entered into the SW. The CE pin must be HIGH for proper operation. We can connect it to 3.3V, but it is better to select a free pin on the processor, set it to HIGH and connect it to CE. I use ESP32 myself and I connected the CE pin to EN on the processor. For low phase noise, the power supply to the ADF4351 module must be separate from the processor power supply.
35M-4.4GHz PLL RF Signal Source Frequency Synthesizer ADF4351 Development Board
US$22.99 US$35.99
5
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Comments (0)
hAKi 13/05/2021
Nice!
5PCS XANES® EDC Folding Knife 160mm 3Cr13 Stainless Steel Sharp Blade Outdoor Survival Camping Folding Knife
US$13.79 US$40.99
0
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Comments (0)
hAKi 11/05/2021
It works great up to 2.2 GHz, then the gain starts to drop.
5-6000MHZ Gain 20dB RF Ultra Wide Band Power Amplifier Module With Shell
US$16.09 US$22.99
0
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Comments (0)
hAKi 08/05/2020
Nice little display! Works well with excellent library U8g2lib.h and constructor U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE) and library U8x8lib.h with constructor U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(U8X8_PIN_NONE).
3Pcs 0.96 Inch Blue Yellow IIC I2C OLED Display Module
US$19.67 US$27.99
2
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Comments (0)
hAKi 23/04/2020
Excellent amplifier! With 0,5 mW at input you get 2,6 W at output. Recommended!
1MHz-1000MHZ 35DB 3W HF VHF UHF FM Transmitter Broadband RF Power Amplifier For Ham Radio
US$34.49 US$43.99
2
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Comments (0)
STM32F401 Development Board STM32F401CCU6 STM32F4 Learning Board
US$8.49 US$16.99

Q: Is it possible to program this black pill with Arduino IDE?

Asked by hAKi on 2020-11-14 03:30:16

Bruce Ithink it CAN

2020-11-25 02:05:00 Helpful (0)
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Answers (1)
hAKi 18/11/2020
Good idea, execution could be better. The output filter should be better, there is a lot of residual switching noise. There is no crossover distortion and frequency response are very good indeed. Pity for output filters… Measurements are done on pure resistive load and at RMS output power of 5W.
TPA3116 Class D bluetooth 5.0 HIFI 2x50W Stereo Amplifier Support USB TF Card RCA AUX USB Stick
US$29.89 US$37.99
0
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Comments (0)
hAKi 08/05/2020
As expected.
Geekcreit® IIC / I2C 1602 Blue Backlight LCD Display Screen Module Geekcreit for Arduino - products that work with official Arduino boards
US$6.89 US$9.99
0
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Comments (0)
Geekcreit® Signal Generator Module 35M-4.4GHz RF Signal Source Frequency Synthesizer ADF4351 Development Board
US$36.79 US$47.99

Q: Is it possible to drive/control Signal Generator by Arduino? Is there any appropriate library for that board?

Asked by hAKi on 2020-02-25 02:40:30

Backcour Has Arduino controlled, but not suitable for this board

2020-03-04 12:15:27 Helpful (0)
Submit
Answers (1)
hAKi 02/10/2019
Was tested and it is OK!
Excellway AC/DC Adjustable Power Adapter Supply 4-24V 2.5A 60W Speed Control Volt Display EU/US/AU/UK Plug
US$11.03 US$19.99
0
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Comments (0)
hAKi 19/01/2018
It works (in opposite from the one ordered before) but screen was slanted and not centred to the PCB.
1.3 Inch 4Pin White OLED LCD Display 12864 IIC I2C Interface Module
US$15.99 US$19.99
1
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Comments (0)
hAKi 19/01/2018
Definitely I do not have luck with displays from Banggood. First, received display was not as it was described. It has only one row of pins - disturbing, if you already prepare a HW. Second, one of the received displays has stains in the screen. The last, but not the least, only one of received display works and unfortunately that with stains.
2Pcs 84x48 LCD Module White Backlight For 5110 Arduino UNO Prototype
US$7.35
0
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Comments (1)
hAKi 19/01/2018
Comes well packed and works as expected.
Geekcreit® 3D Printer Stepstick DRV8825 Stepper Motor Driver Reprap 4 Layer PCB
US$6.55 US$13.10
0
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Comments (0)
hAKi 19/01/2018
Very convenient for Arduino Nano. It has pins as classical Arduino UNO + a lot of additional pins for sensors together with GND and VCC. It has additional pins for comm and I2C also. Will buy more of them.
Geekcreit 328P Multifunction Expansion Board V3.0 For NANO UNO
US$4.41 US$9.99
0
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Comments (0)
hAKi 19/01/2018
Good, comes with a lot of spare screws. I like this!
5mm Flange Coupling Optical Axis Support Fixed Seat Steel Rigid Flange Plate Shaft Connector
US$3.65 US$8.99
0
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Comments (0)
hAKi 19/01/2018
Solid motor, recommended for all kind of DIY toys
Rubber Wheel + 3V-6V DC TT Motor For Smart Robot Car
US$4.07 US$8.99
0
Recommendations
Comments (0)
hAKi 19/01/2018
Mini voltmeter is a nice and convenient product. They can be calibrated as well.
Geekcreit® 0.28 Inch 2.5V-30V Mini Digital Volt Meter Voltage Tester Two Line Voltmeter
US$7.24 US$8.99
0
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Comments (0)

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