John-Glammis
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10 Adet Mini DC Ayarlanabilir Güç Kaynağı Buck Modülü Step Down Modülü
US$12.29 US$11.99

Q: What is the quiescent (standby) current with zero output and 12V input?

Soran John-Glammis Açık 2024-05-14 12:26:07
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John-Glammis 17/06/2022
Works very well for my 48V lead acid battery assembly. Also quite accurate for voltage, but I am not sure about capacity since I have old batteries. It was hard to understand the instructions. Read them carefully and read some of the Q&A to get a good understanding of how it works. The FUNCTION button is in front, the SETTING button is in back. I finally got it to shut off after 10 seconds (current draw went from 4.5mA to less than 0.1mA) by pressing the back button, powering up, (that shows the current battery selection type, P4 in my case), short pressing the front button to get the "4" flashing, long pressing the front button to get to "S" mode, using the back button to select S2, short pressing the front button to select it ON, and powering down.
Geekcreit® 12V/24V/36V/48V 8-70V LCD Asit Kurşun Lityum Pil Kapasite Göstergesi Dijital Voltmetre
US$9.83 US$13.99
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Geekcreit® 12V/24V/36V/48V 8-70V LCD Asit Kurşun Lityum Pil Kapasite Göstergesi Dijital Voltmetre
US$9.83 US$13.99

Q: How can I set for a 24V lead-acid battery? I followed the instruction but it doesn't display P24. The P parameter value is from 1 to 17 !

Soran massi636 Açık 2019-02-01 05:19:40

John-Glammis The instructions are a bit incorrect. P2 would be what you need for 24V (e.g. 2 lead acid batteries). I use P4 for 48V.

2022-06-17 09:15:46 Yararlı (0)
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John-Glammis 05/05/2022
Worked perfectly out of the box. It draws less than 10mA at night, delivers charge as soon as the sun is up, and stops charging at 13.7V as advertised. The display shows the current voltage accurately. I am happy, especially at this price.
10/20/30A 12V 24V Otomatik Çift USB Güneş Paneli Şarj Kontrol Cihazı Pil Şarj Adaptörü LCD
US$11.99 US$14.99
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John-Glammis 31/03/2022
Smaller than I thought. However, running an efficiency test with uncalibrated equipment, going from 12 V to 5 V gave me an efficiency of 75% at 13mA and over 90% above 100mA. It ran cool at 1.1A out.
3 adet Mini DC-DC Ayarlanabilir Step Down Güç Kaynağı Modülü 12V 24V'ten 5V 3.3V 9V 3A mini360
US$6.99 US$9.99
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John-Glammis 14/10/2021
Arrived in 16 days (Canada) which is good. Product quality looks good although the included fuses looked a bit flimsy. Happy with purchase.
6Way Blade Sigorta Kutu Blok Tutucu ATO ATC Devre Standardı 12V 24V Araba Marine
US$7.99 US$9.99
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John-Glammis 09/10/2021
Pro: Reads voltage well - clear and bright. Con: mounting holes very close to body. Components on back easily damaged. Note: I thought the voltage readings were not very accurate but later found that there is a potentiometer on the back that you can use to adjust the display offset.
10 Adet Geekcreit® Kırmızı Led 0.28 İnç 2.5 V-30 V Mini Dijital Volt Metre Gerilim Test Cihazı Voltmetre
US$10.44 US$12.53
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John-Glammis 20/10/2020
Received in good condition. The measured resistance is very close to 62 (59-63 ohms).
20 adet 2 W 62R Metal Film Direnç Direnci 1% 62 ohm Direnç
US$5.99 US$7.99
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5 Adet DC 7 V-24 V DC 5V 3A USB Çıkışı Dönüştürücü Adım Aşağı Modülü KIS3R33S Güç Kaynağı Kurulu
US$23.51 US$28.21

Q: What is the no load current? I would like to use it on a car battery without a switch.

Soran John-Glammis Açık 2020-09-18 12:48:54

xiaohui sorry not sure for that

2020-10-10 10:19:56 Yararlı (0)
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75 Adet 0.1Ω-20Ω 3W Karbon Film Direnç 15 Değer Karışık Kit
US$6.99 US$8.49

Q: What are the 15 values in ohms?

Soran John-Glammis Açık 2020-10-02 06:27:10
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DC-DC 9V/12V/24V/36V - 5V Çift USB Buck Modülü Araç Şarjı Solar 3A Voltaj Regülatörü Kartı
US$3.99 US$9.99

Q: What is the no load current? I would like to use it on a car battery without a switch.

Soran John-Glammis Açık 2020-09-29 04:28:49

PaulVdB I'm sorry, I never measured it. But I guess that is very little (<1mA). I use it in a solar system and don"t see a difference (in mA) when it's connected or not.

2020-09-30 02:43:33 Yararlı (0)
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John-Glammis 03/06/2018
Very small unit with amazing voltage stability. (+/1 0.01V over 10-24V and 0-300 mA). I did not sense any heat at 300 mA. Attached is a spreadsheet with my efficiency calculations, realizing that my equipment is not calibrated. I considered the efficiency very good at high currents and even above 68% at 36mA input current. However, the quiescent current with no load is quite high at about 9mA.
DC-DC Ayarlanabilir Güç Kaynağı Buck Dönüştürücü Adım Aşağı Modülü
US$7.99 US$9.99
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50W+50W TDA7492 CSR8635 Kablosuz bluetooth 4.0 Ses Alıcı Amplifikatör Kart NE5532 Preamp
US$15.74 US$19.99

Q: Is the power supply centre post positive or negative?

Soran John-Glammis Açık 2018-06-13 08:26:06

Secern Sorry I don't understand what you mean.

2018-06-19 04:20:07 Yararlı (2)
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John-Glammis 17/03/2018
Packaging was good, though delivery took 39 days to Canada. Works well. Quiescent current about 12mA throughout input voltage range. Figuring out how to wire it was frustrating, so I am attaching a sketch of my device as I wired it in a self powered mode. Note the thick red wire is the positive current flow return to the meter. Construction appeared good. Accuracy on voltage was great (+/- 0.01 V) while accuracy for low currents was good at +/- 1mA.
RIDEN® 0-33 V 0-3A Dört Bit Gerilim Akım Ölçer DC Çift Dijital LED Ekran Voltmetre Ampermetre
US$10.99 US$13.99
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DC 7 V-24 V DC 5V 3A USB Çıkışı Dönüştürücü Adım Aşağı Modülü KIS3R33S Güç Kaynağı Kurulu
US$5.99 US$7.99

Q: What is the quiescent (or no load) current? I want to use it off batteries but don't want to disconnect/reconnect all the time.

Soran John-Glammis Açık 2019-04-26 11:30:38

rupe01 He is asking what is the current used when it has NO LOAD?

2019-09-23 12:25:17 Yararlı (0)
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John-Glammis 30/06/2018
Seems to deliver stable 5V (approx) power under a wide range of input conditions. However, the efficiency is not particularly high at low currents, as would be expected. Attached is a table of efficiency calculations using my non-calibrated equipment. No load current is 5mA which is a bit high for my liking. John from Ontario, Canada
Dual USB 9V/12V/24V/36V'ten 5V Dönüştürücü DC-DC 3A Adım Aşağı Güç Modülü
US$2.99 US$7.99
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John-Glammis 21/01/2019
Appears good, all 4 relays worked OK, delivery time was good. However, the relays were not SONGLE as shown in the pictures. They are Hong Wei and look very similar. What worries me is that I cannot find a datasheet for Hong Wei with details as to their characteristics (release time, closing time, etc). Since the picture clearly shows Songle relays, if you are substituting, say that we may get Hong Wei relays instead.
Geekcreit® 5V 4 Kanal Röle Modülü PIC ARM DSP AVR MSP430 Geekcreit için Arduino - Resmi Arduino kartlarıyla çalışan ürünler
US$7.64 US$9.99
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John-Glammis 14/01/2019
I measured all 5 and got a D-S resistance of about 0,4Ω at 1 ampere and 10V at the gate. They look good and should work well.
5 adet IRFZ44N Transistör N-Kanal International Rectifier Güç Mosfeti
US$8.60 US$15.03
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John-Glammis 14/01/2019
Label is clearly legible on the Temp sensors. Have yet to test.
5 Adet DS18B20 Sıcaklık Sensörü 18B20 TO-92 Kapsülleme
US$5.99 US$6.99
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John-Glammis It is in Thai. It says: Good product, but it is recommended to buy 1602LCD Display I2C module more. Https://goo.gl/LdLr2d

KKEENNGG 09/10/2017
สินค้าดี แต่แนะนำว่าต้องซื้อ 1602LCD Display I2C module เพิ่มเติม https://goo.gl/LdLr2d
Geekcreit® 5V 2004 20X4 204 2004A LCD Ekran Modülü Mavi Ekran
US$10.52 US$11.99
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