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Brightnoise 18/01/2023
Versatile DC-DC converter, works from 4 volt to (at least, what I tried) 20 volt. Output is clean DC voltage from low to high; adjustable. One technical minus point: the output can peak up to 45 volt, unwanted, when input voltage is lower than 4 volt. Minus point for this individual case: I had to pay "inklaringskosten" because the EU customs say that Banggood did not pay that. Despite their promise. I think Banggood will solve this problem.
Geekcreit® DC-DC Boost Buck Adjustable Step Up Step Down Automatic Converter XL6009 Module Suitable For Solar Panel
US$6.99 US$8.99
0
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3Pcs Original Hiland 1Hz-50MHz Five LED Display Frequency Counter With Frequency Oscillator Kit
US$14.21 US$26.99

Q: How do I set an offset of for example 10.7 MHz in a receiver to display not the oscillator frequency but the actual receiving frequency? Do I need a pic programmer for that or can it be done without changing the program?

Asked by Brightnoise on 2021-10-22 11:59:04
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Brightnoise 24/01/2021
This is a real receiver with the Russian software! Software version 1.0C is an improvement over the more standard demosoftware! Low interference from internal electronics is also a positive point. One negative point is the low sensitivity of the touchscreen and some misalignment in the touchscreen positions. Over-all: good receiver.
50KHz-2GHz Malachite SDR Radio DSP SDR Receiver 3.5" Touch Screen AM/SSB/NFM/WFM Analog Modulated
US$134.99 US$179.99
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Brightnoise 23/12/2020
In the product description missing: "Is the program present in the delivered hardware?". Answer: yes, the tuner works out of the box, after the diy soldering etcetera. One very important remark: the connection between tuner board and display unit is with four wires (plus, minus, clock and data). ----> The clock and data wires need a cross-connection in the wires (the sequence of the wire connections on the board is different on the display unit). I had to look for this, because the display was not working initially.
MINI 0.96 inch OLED ATU100 Automatic Antenna Tuner 100W Automatic Daytime Tuning Kit
US$32.99 US$43.99
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Brightnoise 03/12/2020
Good amplifier, clear sound. High efficiency. Use this with a 19 volt laptop supply with max current of 3.5 ampere and output power of two times 25 watt is easily possible thanks to the high efficiency. Remarkable low radio interference on medium wave and other AM frequencies! Stays cold/cool with higher output. Good choice also for Li-Ion (4 cells in series) and portable use. Frequency range 19 Hz to 25 kHz zero dB when loaded with resistor. Some deviation of frequency response with complex load, up to max plus and minus 2 dB in the 10 to 16 kHz range with some speakers. Happy with the small size too. Recommended.
ZK-502H 50Wx2 TPA3116D2 HIFI 2.0 Stereo Bluetooth 5.0 Digital Power Amplifier Module
US$12.38 US$21.99
4
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Brightnoise Just for your information: the delivered firmware for my tuner was version 3.0 (up to date) and works as explained in the manual by N7DDC.

Brightnoise 23/12/2020
In the product description missing: "Is the program present in the delivered hardware?". Answer: yes, the tuner works out of the box, after the diy soldering etcetera. One very important remark: the connection between tuner board and display unit is with four wires (plus, minus, clock and data). ----> The clock and data wires need a cross-connection in the wires (the sequence of the wire connections on the board is different on the display unit). I had to look for this, because the display was not working initially.
MINI 0.96 inch OLED ATU100 Automatic Antenna Tuner 100W Automatic Daytime Tuning Kit
US$32.99 US$43.99
1
Comments (2)
Brightnoise 04/12/2020
Incredible good product. Also selective measurements can be done (fieldstrength). Helpfull in finding interference sources. I am very happy with this spectrum analyser. Accuracy without calibration is already within a few dB. Actual lowest frequency in my spectrum analyser is 25 kHz!
100kHz-350MHz 2.8 Inch Handheld Two Inputs Tiny Spectrum Analyzer Touch Screen Spectrum Analyzer 100 KHz-350MHz Input Frequency
US$68.99 US$76.99
0
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Brightnoise 03/12/2020
Easy to use and accurate. Resolution 0.1 degrees celsius. Narrow measurement bundle to measure temperature at ceiling: very usable for leakage of heath in a house.
FUYI -50~580℃ Non-Contact Infrared Digital Thermometer Laser Handheld IR Temperature Meter With K Type Thermocouple
US$17.99 US$23.99
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Brightnoise 03/12/2020
Well performing. One outside temperature transmitter can be received on two of these units, in different rooms. That was important for me. Display is clear and easy to read.
FanJu FJ3364 Digital Alarm Clock Weather Station Wireless Sensor Hygrometer Thermometer Multi-function LED Desktop Table Clock
US$15.16 US$26.99
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FNIRSI 1C15 Professional Digital Oscilloscope 500MS/s Sampling Rate 110MHz Analog Bandwidth Support Waveform Storage
US$71.99 US$72.99

Q: Missing in the specifications is the input impedance on the connector: resistance and capacitance. For table-top oscilloscopes this is standard 1 Mega Ohm and 100 pF in parallel. With ten-times attenuating probe the input impedance CAN be 10 Mega Ohm inparallel with 10 pF, requiring a special probe. Please add the input properties to the specification.

Asked by Brightnoise on 2020-10-29 01:00:15

wuchuangbin Hello friends, you can consult customer service

2020-11-06 12:46:56 Helpful (0)
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Brightnoise 08/06/2020
Today I received the spectrum analyser for 2.4 GHz. Incredible small. The analyser works, but can't be used as a sniffer. I am very disappointed in the sensitivity: I have not seen more than a few millimeters line lengts. My router is 300 mW and even close to the antenna(s) there is only a small output on the display. In 3 meters distance there is NO display frequency occupation visible . Appearance is good but display is mounted under an angle and glued; can't be corrected. It is a spectrum analyser: what a pity that the sensitivity is so poor that it can't be used as sniffer.
Handheld Spectrum Analyzer High Sensitivity 2.4G Band OLED Display Tester Meter
US$14.39 US$19.99
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Brightnoise 08/06/2020
Five star cable. One remark: cable is not really flexible; just that you know it.
BNC Male to SMA Male Connector 50ohm Extension Cable Length Optional
US$4.99 US$8.99
0
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Brightnoise 08/06/2020
Good ferrite clamp. Induction 750 nH * N^2 (2 windings is 3 microHenry, etc).
5Pcs 13mm Black Cable Wire Snap Clamp Clip RFI EMI EMC Noise Filters Ferrite Core Case
US$7.47 US$16.81
0
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Brightnoise 08/06/2020
Accurate and sensitive device! According specification. Power supply voltage is not critical (no offset from Vcc-variation!). Really accurate measurement device! Can also be used as receiver: connect antenna to input and audio amp to output: audio from strongest AM-signal is audible; LOG-conversion works as automatic gain control. With antenna tuner (for selectivity) it is a nice monitor receiver. I am very happy with this power meter.
0.1~600M -75~+ 15dBm Power Meter Logarithmic Detection AD8307 Module
US$12.70 US$19.99
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Brightnoise 08/06/2020
Perfect solder paste; smells like expected and solder flows as with the best paste.
DANIU Welding Solder Paste Flux Soldering Flux Paste Grease Gel
US$6.99 US$10.99
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Brightnoise 26/05/2020
Ferrite clamp. Induction 750 nH multiplied with N^2 (two windings give 3 uH, etc).
5Pcs 7mm Black Cable Wire Snap Clamp Clip RFI EMI EMC Noise Filters Ferrite Core Case
US$6.21 US$9.00
0
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Brightnoise 26/05/2020
This cable is value for money. Cable RG-174. Attention: the connector is RP, which means reverse male-female (not standard SMA).
RG174 1M/5M RP-SMA Male to Female Wifi Antenna Extension Cable for Wireless Network Card Router AP
US$4.42 US$9.99
0
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Brightnoise 26/05/2020
This cable is value for money. Cable RG-174, nearby 50 Ohm, loss 2.5 dB at 30 MHz. Attention: the connector is RP, which means reverse male-female (not standard SMA).
20M RP - SMA Male To Female Wireless Antenna Extension Ribbon Cables
US$9.70 US$20.99
0
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NanoVNA Vector Network Analyzer 50KHz -900MHz Digital LCD Display HF VHF UHF Antenna Analyzer Standing Wave USB POWER
US$41.88 US$75.00

Q: هل يقوي شبكه الهاتف النقال لان شبكه الاتصال ظعيفه عندي

Asked by عبدربه عباد on 2019-08-29 10:51:50

Brightnoise Google Translate: "Do you strengthen the mobile phone network because the network connection I have thin (?)" What are you asking exactly? This equipment has no network or mobile phone connection. There is a USB-connection with a computer.

2019-10-14 12:50:45 Helpful (0)
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Brightnoise 25/01/2019
Usable solder wire, but flux is smellling different from usual and tin wire is not as good as top brands. Good price performance, but not for all applications.
300g 0.6mm Reel Roll Welding Wire Welding Solder Wire 63/37 Tin Lead 1.2% Flux
US$8.03 US$20.99
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