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Kit de indicador de nível DIY Kit de produção eletrônica
US$8.99 US$9.99

Q: What voltage values are Vcc and the typical Input signal?
The use of C2 suggests this is only for AC, probably audio signals. Is that correct?

perguntado por MSmith sobre 2023-07-21 04:23:31

Genteel DC5V, C2 is an electrolytic capacitor, J2 is an audio signal.

2023-07-22 12:43:57 Útil (2)
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respostas (1)
MSmith 08/03/2023
Well packed. The lid clips on securely enough so that no screw is really needed to hold it on (no screw was provided but there is a hole for one to fit in). There is an on/off slide switch which is handy for development work. Cells securely held in place. Wires colour coded and long enough at about 120mm.
Caixa de bateria com 4 slots para pilhas AA com interruptor, para 4 pilhas AA, kit de DIY Case
US$3.99 US$6.00
0
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KING DO WAY 4 Pacote de Bolsa de Armazenamento de Roupas Grande Capacidade Organizador de Armário Casa Exterior Viagem
US$37.94 US$45.53

Q: Two questions: 1 - is the size 44.5x36.3x10.6 cm (as in the writing) or 60x40x35cm (as in the picture) ? 2 - Can the divider be taken out?

perguntado por MSmith sobre 2021-10-22 11:55:12

Filipe 1- Size is 60x40x35 cm 2- Divider cannot taken out 3- God product

2022-03-13 06:19:46 Útil (0)
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respostas (8)
MSmith 04/01/2022
Works. Does what it claims. Handy size. Excellent value for money. Took only a few minutes to learn to use it and to set the unit of measurement to metres. Minor criticisms are: instructions difficult to read because of blurred symbols and small font size; fiddly controls for large fingers.
Telêmetro a laser digital MUSTOOL de 80m com sensor de ângulo eletrônico, comutação de unidades M/In/Ft, carregamento USB, modo pitagórico, medição de distância, área e volume
US$25.99 US$39.99
0
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MSmith 02/02/2021
Works well even with rechargeable cells. Has a clear display. Possibly because I am old I have to make sure my hands are warm (looking pink not white). Look carefully at the polarity signs in the battery compartment as they are not too obvious and not intuitive. Attractive price.
BOXYM JSL-X201 Oxímetro de Pulso com Pinça de Dedo Monitor de Oxigênio Saturometro Monitor de Frequência Cardíaca Digital SPO2 Médico Saturatiemeter Monitor do Dedo
US$16.99 US$20.99
0
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MSmith 20/09/2020
Good value and neat size. Polarity marking is not obvious: the arrows on the side point to the positive terminal. The positive terminal (as with button cells) is slightly domed (curves upwards) and has a conducting surface of slightly smaller diameter than the negative flat surface.
3pcs 5.5V 4.0F Farad Capacitor 5.5V4.0F Super Capacitor Capacitor de dupla camada H Tipo
US$4.41 US$10.99
1
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MSmith 20/09/2020
Only used in a test circuit so far and only required to supply 60mA but it did the job. Small enough to fit inside a UK household mains surface mount box together with relay and other circuitry.
Módulo de fonte de alimentação isolada AC-DC de 220V para 5V 5W
US$8.99 US$10.99
0
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MSmith 20/09/2020
Only used in a test circuit so far and only required to control 60W bulb but it did the job. Small enough to fit inside a UK household mains surface mount box together with relay and other circuitry.
3pcs 5V Disparador de Nível Baixo Módulo de Relé de um Canal Placa de Interface Shield DC AC 220V
US$6.59 US$8.99
0
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MSmith 20/09/2020
Compact for the high capacitance value. Leakage on the one I testes was about 50Mohm which is satisfactory. good value for money. In my pack one was case dented so I discarded that one.
20pcs Capacitor Eletrolítico Radial 1000µF 25V 10 x 17mm 105°C
US$2.99 US$4.99
0
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MSmith 20/09/2020
good action. large enough to be easy to press.
Interruptor de botão momentâneo de 5 peças 3A 125V LIGA-DESLIGA buzina Plástico Verde
US$2.95 US$8.99
0
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Módulo de fonte de energia ajustável XY-SK80 DC-DC 80W 5.1A Buck Boost automático Conversor de voltagem CC CV Step Up Down Conversor de carregamento solar
US$16.99 US$20.99

Q: If I set the output to 9V, 0.2A, then later the input power source is switched off, when the power source is switched back on, will the output still be set to 9V, 0.2A? That is, are last time's settings restored on power up?

perguntado por MSmith sobre 2020-09-05 04:04:19

Dyphone Yes,last time's settings restored on power up.

2020-09-15 01:02:56 Útil (0)
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respostas (1)
MSmith 19/08/2018
This worked well on old baked on fatty marks on the outside of pans. After several uses the working end looked blocked up with dirt and I was expecting it to stop working but I was wrong. Two months on it is still working. All I have had to do is strip off a couple of mm of the sheath and it keeps on working well. It works on crockery too. I have put some carpet tape around the sheath to give a better grip in soapy water. The photo is of the effect on a frying pan's outside after a few rubs in one place when the stick has been used for several weeks.
2 peças de Varinha Mágica de Limpeza em Aço Inoxidável Honana, Removedor de Ferrugem de Metal, Ferramentas de Limpeza de Cozinha
US$8.99 US$10.99
1
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3pcs 5V Disparador de Nível Baixo Módulo de Relé de um Canal Placa de Interface Shield DC AC 220V
US$6.59 US$8.99

Q: Is there a built-in reversed diode in parallel with the relay coil to prevent a high voltage spike being sent back to the driver circuit on switch off?

perguntado por MSmith sobre 2020-09-03 10:28:39

hansdeboer Yes, there is, as it should be. Otherwise it would destroy you Arduino port immediately.

2020-09-03 03:38:56 Útil (1)
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respostas (1)
MSmith 23/08/2020
Simple, light, takes up practically no room in your pocket or handbag. One size but stretches a little. As with most simple masks, if you wear spectacles they will fog up a little when you breathe out. Good value. Likely to help protect others from the risk of protection while speaking, breathing, coughing and sneezing as it covers the nose adequately.
Esponja de poliuretano 3pc Máscara Anti-embaçante respirável Máscara
US$7.98 US$30.99
0
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MSmith 15/08/2020
It works well enough. Adequate attachment to vehicle. Just big enough for my phone which has a folding cover/case. A bit fiddly to put the phone into it - especially if working one-handed.
ABS Suporte de telefone para carro Saída de ventilação Suporte de montagem de clipe de ligação por gravidade para iPhone / Samsung /
US$5.19 US$11.84
0
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MSmith 15/08/2020
These do work well for several months. Very useful for stubborn, baked on dirt on metal or ceramic surfaces. Functional rather than cosmetically attractive.
Honana 4 pçs Escova de Limpeza de Aço Inoxidável Mágica Bastão Removedor de Ferrugem de metal
US$7.99 US$9.99
0
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MSmith 15/08/2020
Clear display. Automated alternate display of voltage and current but you can't display just one of those.. Easy to use. Self-powered. useful in a wide range of scenarios. Excellent value for money. The device's calibration was accurate according to two of my other measuring instruments.
DC 3-7.5V 0-5A V2.0 Medidor de Voltagem e Corrente USB
US$0.99 US$9.99
0
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MSmith 15/08/2020
Clean. Grease free. Adequately packaged. Good selection of sizes.
Geekcreit® 40pcs FR-4 PCB de Protótipo de Dupla Face com Passo de 2,54mm
US$9.99 US$15.99
0
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MSmith 15/08/2020
Handy. Comprehensive. Easy enough to use for basic functions. Readout digits fairly small (for aged eyes) but then there is not much spare space on the device.
3 em 1 USB Tester Bateria Detector de corrente de tensão Detector de corrente de tensão de energia móvel
US$14.29 US$15.99
0
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MSmith 15/08/2020
As described. Adequately packaged - a few slightly bent pins.
10pcs 3296W 100K ohm Trimpot Trimmer Potenciômetro
US$1.83 US$7.99
0
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