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ATOMSTACK 20W Laser Engraving Machine S20Pro Laser Engraver 20W Effect High Precision Laser Laser Engraving Cutting Machine With Air Assist Kit High Energy Laser Cutter for 25mm Wood 0.01mm 32-bit Motherboard Ultra-Fine Fixed-Focus Compressed Spot
US$835.99 US$1,999.99

Q: Can it etch copper off a PCB?

Asked by Echobot on 2022-06-03 08:20:05

The seller yes.it can

2022-06-24 07:37:10 Helpful (0)
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New ATOMSTACK M50 Double Ultra-Fine Compressed Spot Laser Module Upgraded Fixed-focus Laser Engraving Cutting Module For Laser Engraver Machine 3D Printer CNC Milling DIY Laser
US$349.99 US$699.99

Q: how is this 50W when then tech specs show max 38W?

Asked by ILMGuy99 on 2021-08-25 09:40:31

Echobot Power = Voltage x Current. So this unit is 12V x 3.2A = 38.4 Watts. This is NOT a 50 Watt unit. The claimed Optical Output power is 10 Watts. The only way to be sure that this 10 Watt figure is accurate, is to measure it with an Optical Power Meter.

2021-09-24 09:19:03 Helpful (5)
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BAOFENG X3-Plus 2800mah 8W Tri-band Radio Walkie Talkie 20 KM Waterproof UHF/VHF Transceiver 220MHz Radio Transmitter Black
US$45.99 US$87.99

Q: This is listed as a 18W radio but in the video, the test shows it's only 5 Watts output. Why is there a difference?

Asked by Echobot on 2021-03-27 01:36:39

Hudson The advertised 18w is actually the wattage of the battery, give or take a bit. 7x2.8= 19.6w.

2021-04-30 06:39:00 Helpful (2)
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Echobot 25/02/2021
This is an excellent meter and great value for money. I liked it so much that I bought a second one.
ANENG AN113D Intelligent Auto Measure True- RMS Digital Multimeter 6000 Counts Resistance Diode Continuity Tester Temperature AC/DC Voltage Current Meter Upgraded from AN8002
US$21.99 US$29.99
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Echobot 25/02/2021
This is an excellent meter and great value for money
ANENG AN113D Intelligent Auto Measure True- RMS Digital Multimeter 6000 Counts Resistance Diode Continuity Tester Temperature AC/DC Voltage Current Meter Upgraded from AN8002
US$21.99 US$29.99
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Echobot 25/02/2021
The stones are good quality and it is clear that they did prepare the surface of the two knives I tried sharpening, however I was not able to get them sharp. I'm sure that the problem is not the stones, but that I was not using the correct technique and that some more research and practice is required.
400/1000+3000/8000 / 400/1000 Grit Premium Whetstone Cut Sharpening Stone Sharpen Stone Cutter Sharpener
US$15.99 US$29.00
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Echobot 14/10/2020
Very good value for the money. Works as advertised and is accurate. Bluetooth connection to the Android app worked perfectly.
UD18 USB3.0/DC/Type-C 18 in 1 USB Tester APP DC Digital Voltmeter Ammeter HD Color Screen 6-Bit High Precision Display UD18 bluetooth Digital Meter
US$26.09 US$36.99
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Echobot 02/10/2020
The load works as advertised. It's actually good value for the money. The Android App is good but I can't seem to save the data that is captured in the graphs, so unless I'm doing something wrong, that could be improved upon. I haven't tried the PC software yet; hopefully you can save the data there. Other than that, the unit works well. You can adjust the load to different settings when it is running, so when testing a switch mode supply, you can increase the load until the supply stops regulating and easily work out what its capacity is. I had no trouble setting up the Bluetooth app on the android and using the unit without having the read the manual, so it's pretty intuitive in my opinion. There's no way I could build something as versatile for the price, so I think it's great value.
180W DL24P 2.4 Inch DC USB Tester Electronic Load APP 18650 Battery Capacity Monitor Discharge Charge Power Meter Supply Checker with Color Display 4-wires System
US$59.99 US$68.04
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Echobot 12/07/2018
This device worked as advertised. The display updates quickly in real time and the resolution is excellent. The sensitivity is OK but not fantastic. I can pick up my access point from about 5m away, but it would be a great improvement if you could attach an external antenna to improve range. For the price, it's great value in my opinion. I can quickly check to see whether my 2.4Ghz devices are interfering with each other or operating on different parts of the spectrum.
Lantian Mini High Sensitive 2.4ghz Frequency Spectrograph OLED Display Open Source For RC Drone
US$16.99 US$20.39
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