Peter
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Peter 27/07/2022
This is a serious high performance instrument worth 10 stars, but has a few issues that subsequent firmware upgrades should address. Most important problem that needs repair is assembly of PCB & screen into steel case. Upon receipt of unit found USB-C socket loose and charging plug on 15 degree down angle when connected. Removed case back, released white RTV securing LED lens and carefully remove PCB & screen to find USB-C attached by power & data pins only. Caused by case holes not punched in correct location and PCB & screen forced into position during assembly. Re-seated USB-C socket and soldered mount pins. Carefully scratch PCB coating beside USB-C to reveal copper then reinforce socket with more solder both sides. Do NOT disturb small tracks on power switch side of USB-C. Do same for USB-A socket. Use small file to enlarge USB-C and power switch holes in case, larger toward front, approx 1.5mm. USB-A not required enlargement on mine. Test fit to confirm clearance and when complete, clean filings, sharp edges & small amount of black paint with artist brush to protect. If you do not do this work, in short time USB-C socket will rip small tracks off PCB that cannot be repaired, rendering instrument useless. Don't over-tighten 6 PCB & screen securing screws as this can bend display. Can be overcome by confirming case face is flat by using edge of a ruler. Carefully tweak case so face is flat and level, which will straighten the 2 centre stand-offs allowing PCB & screen to seat flat. Once assembled, LED lens may rise slightly above PCB, simply apply small amount RTV to secure. Do not over tighten the SMA to N-socket nuts during re-assembly.
NanoVNA Vektorhálózat-elemző, 100 dB dinamikus tartománnyal, 7 hüvelykes kijelzővel, 50 kHz-4400 MHz frekvenciatartományban.
US$352.99 US$399.99
2
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Peter 04/06/2021
A sack full of these is a must have if you experiment with micro controllers and module boards.
10 db Logikai szintváltó kétirányú IIC 4 út szintkonverziós modul
US$9.23 US$9.99
0
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Peter 04/06/2021
Excellent product. Have replaced all my radio program cables with this board. Too many problems with Prolific and clone program cables and drivers. If you understand the connections, simply cut off the original USB adapters and connect to this board. Plug into computer and drivers load automatically. The board just works - every time.
5 darab FT232RL FTDI USB-TTL soros átalakító adapter modul
US$17.31 US$17.99
0
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Peter 04/06/2021
Good product. Low current draw. Slave mode only. Works as expected.
5 db JDY-31 SPP-C átjáró vezeték nélküli Bluetooth BLE modul soros kommunikációhoz, kompatibilis a CC2541-vel
US$18.47 US$19.99
0
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Peter 04/06/2021
Received in good condition. Very versatile board. Can make simple mppt solar charger to 5 amps. Also power with lithium batteries to provide constant 13.8 volt power supply. Beware board creates radio interference so need to shield with filter on input & output. Gets hot over 5 amps constant use, need fan to cool.
LTC3780 DC 5V-32V 1V-30V 10A Állandó Feszültség Áram Automatikus Lépés-up Lépés-le Rögzítő Modul Töltés
US$14.99 US$20.99
0
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Peter 04/06/2021
Arrived in good order. Excellent build quality. Connect 12 volts to input socket, green power led flashed once then no more. Found series power diode open circuit. Beware if you use this socket. Powering with 5v USB socket no problem. Output signal clean and phase noise consistent with design.
Geekcreit® Jelgenerátor modul 35M-4.4GHz RF jelgenerátor frekvenciaszintézis ADF4351 fejlesztőpanel
US$36.79 US$47.99
0
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