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모든 메시지

rcflyer 04/02/2021
A very useful device that shows the voltage, current and accumulated charge in mAh. This latter feature allows you to check on the battery capacity of your phone or work light etc. In the photo you can see it monitoring the charging of a mobile phone.
KWS-V20 USB 전류 전압 용량 테스터 볼트 전류 전압 감지기 충전기 용량 테스터 미터 모바일 전원 검색기
US$12.00 US$18.99
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rcflyer 23/01/2020
I am very impressed with this FM radio module. It is very sensitive and has superb stereo separation. I was testing it with a mobile phone phone 5V charger which is not recommended due to the switching noise but nevertheless gave excellent reception. I was listening with headphones, I have not yet tried the speaker output. I would highly recommend this device.
Geekcreit® DSP 및 PLL 디지털 스테레오 FM 라디오 수신 모듈 87-108MHz 시리얼 제어 포함
US$14.99 US$19.69
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rcflyer 03/10/2020
Very good value adjustable PSU based on the LM317. There are a few limitations in particular the supplied transformer limits the current available, especially at higher voltages, to well under 100mA. I made a few simple modifications, I use an external 1A unregulated DC power brick of about 15V output. Also I changed the supplied LM317 with a genuine National Semiconductor one to take full advantage of the external power source. In the photo you can see that it can now drive a 12V car sidelight bulb.
DIY AC 220V ~ DC 1.25V-12V LM317 조정 가능한 전원 공급 장치 모듈 키트 하우징 포함
US$11.99 US$15.99
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rcflyer It looks like you connected the mains input to the secondary winding. Mains input are the red wires.

Wiljo 06/02/2018
Drie onderdelen paste niet in het bord. Die heb ik groter moeten boren. Zie laatste twee foto's. De eerste foto is na de explosie alles weggesmolten.
DIY AC 220V ~ DC 1.25V-12V LM317 조정 가능한 전원 공급 장치 모듈 키트 하우징 포함
US$11.99 US$15.99
0
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rcflyer 12/09/2020
Motor appears to be built to a very good standard and runs smoothly. I have installed it in a helicopter as shown in the photo and have had a few flights with it without any problems.
수퍼 패스 호비 F540 RC 자동차 모터 2s/3s 1/10 드리프트 차량 모델
US$19.99 US$23.99
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rcflyer 13/08/2020
Motor appears to be built to a very good standard and runs smoothly. I have installed it in a helicopter as shown in the photo and have had a few flights with it without any problems.
능가 취미 F540 브러시리스 방수 모터 1/10 1/12 Rc에 대한 3000 / 3300 / 3930 / 4370kv 자동차
US$20.99 US$25.99
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rcflyer 02/07/2020
Build quality appears to be good. Runs smoothly with no vibration even at high RPM.
1/12 14 2845 Senseless Brushless 5480/3600/2800KV 모터
US$16.99 US$19.99
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rcflyer 02/07/2020
Works well with my Futaba 7C 2.4GHz transmitter. The transmitter now balances correctly when used with a neck strap. It looks nice as well!
알루미늄 합금 수직 수평 4홀 송신기 목끈 밸런서
US$6.99 US$8.99
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rcflyer 04/04/2020
This work light is very good quality and at full brilliance gives a powerful light. The magnetic base has a strong magnet and easily supports the light. A useful feature is the continuous adjustment from minimum to maximum brightness. It took about 3 hours to charge using the supplied USB cable.
충전식 COB LED 작업 등 자석 나선 스위치 비 극좌 조광 360 ° 회전
US$14.99 US$17.99
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rcflyer 17/03/2020
A useful connector which, for example, allows a wire antenna to be connected to a BNC terminal. Nicely made and of good quality.
BNC Male - 이중 바인딩 포스트 바나나 커넥터 플러그 테스트 어댑터
US$7.99 US$9.99
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rcflyer 19/02/2019
A neat little spectrum analyser at a good price. Don't expect too much as the screen is small, no parameters are adjustable and it is not very sensitive but as you can see in my attached photos you can easily see the way a Spectrum DSM2 Tx only uses two frequencies whereas Futaba FASST uses most of the band. At the price it is well worth buying to check out the local 2.4GHz spectrum and observing the function of various transmitters.
Lantian 미니 고감도 2.4ghz 주파수 분광계 OLED 디스플레이 오픈 소스 RC 드론용
US$16.99 US$20.39
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rcflyer 22/01/2020
This speaker is well made and has very good sound for its size. I would recommend especially as the price is good.
4.8인치 베이스 스피커 스피커 호른 자동 오디오 DIY 122mm 8W 우퍼
US$11.99 US$14.99
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rcflyer 06/04/2019
This Daniu scope packs a surprisingly good performance into its small size. I was skeptical about the claimed 5MHz bandwidth but it is indeed true. You can see the excellent rendition of a 1MHz square wave in the selection of photos and I was able to view a sine wave albeit with slightly reduced amplitude at 8MHz. An excellent set of measurement facilities are provided but there are no cursors. Waveforms can be stored internally but the USB lead provided is for charging only, file transfer to a PC is not possible which is a shame. Overall this little scope is a genuinely useful device at a very good price.
DANIU ADS2050H 핸드헬드 오실로스코프 고정밀 5MHz 대역폭 20M 샘플링 속도 2.4인치 LCD 화면 원 키 자동 내장 리튬 배터리
US$57.99 US$69.99
5
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DIY 3DD15 조정 가능한 전원 공급 장치 모듈 키트 출력 단락 보호 시리즈
US$21.63 US$32.45

Q: Is the transformer rated for 220V or 110V mains?

로 질문하기 rcflyer 에 2019-11-21 06:34:02

Mirthre628 220V

2019-11-27 11:07:31 도움이되는 (0)
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rcflyer 31/10/2019
Quality isn't great but it is adequate and at the price you can't really expect anything better. It does the job, is easy to use and is reasonably accurate. In my tests it was never more than 0.2V in error and often within 0.1V so I would recommend it.
미니 자동차 LCD 배터리 전압 미터 모니터 12V 블랙
US$10.99 US$13.99
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rcflyer 15/12/2018
The kit arrived safely and all parts were present. As another reviewer observed it is slightly different to the one pictured with component values marked and a different chip. You will need a decent soldering iron with a fine tip and a steady hand to fit the radio chip. After that the other components are easy the PCB being of good quality and easy to solder. After about an hour it was ready to test and worked straight away. Sound quality (stereo) is reasonable as is the sensitivity. I had the antenna jumper in the central position to use the headphone leads as the aerial.
DC 1.8V ~ 3.6V DIY 76MHz ~ 108MHz 무선 스테레오 PCB FM 라디오 모듈 학습 키트 오디오 수신기
US$4.31 US$5.17
2
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rcflyer 19/04/2019
Provides true RS232 levels to TTL using the MAX 232 chip. Only converts Tx data and Rx data levels, no provision for flow control. Not a problem for my application but might be for some users. Works very well.
4PCS 케이블과 함께 RS232에서 TTL로 변환하는 모듈 전송 칩
US$7.99 US$9.99
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rcflyer 17/09/2019
There is not a lot you can say about this box, it is nicely moulded in tough ABS and ideal for housing small electronic projects
ABS 플라스틱 전자 인클로저 프로젝트 박스 Black Junction 케이스 103x64x40mm
US$3.99 US$5.99
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rcflyer 17/09/2019
These solderless breadboards are really good for prototyping electronic projects. There is a power bus at the top and at the bottom of the board. I am currently using one for a PIC based project and it has saved a lot of time.
3개 8.5x5.5cm 400 연결점 400 구멍 무납땜 브레드보드 브레드 보드
US$4.99 US$9.99
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rcflyer 17/09/2019
This is for use with the Solderless breadboards, there are two regulators and each can be set to 3.3V or 5V
MB102 브레드 보드 전원 공급 모듈 어댑터 쉴드 3.3V/5V
US$6.99 US$8.99
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