user57476

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• Power misunderstanding?

  @user57476 started

  • 5 comments
  • 2,119 views

  @allObjects replied
• Power misunderstanding?

  in General • 7 years, 4 months

  

  Thanks for your swift replies. I'll give the 4 AA configuration a try before switching to a USB powerbank.

  My need is quite simple: I need to short a circuit three times per hour, during 3 seconds each time. The functional need is to simulate the press of a button on my doorbell at given times - what the physical button actually does can be simulated by placing a wire between two pins. I succeeded in doing this with the aforementioned setup powered by USB...

  Thanks a lot

• Power misunderstanding?

  in General • 7 years, 4 months

  

  Good afternoon,

  I own a ORIGINAL ESPRUINO, which I connected to a SRD-05VDC-SL-C relay (http://rabbitmax.com/files/SONGLE-SRD-05­VDC-SL-C.pdf) using the following pin mapping :

  C6 <--> IN
  GND <--> GND
  VCC <--> BAT

  When I connect this to my computer using micro-USB plug, the relay works perfectly (red light when powered, green light when active, and I hear a little 'click' sound when activating and deactivating).

  Then I tried to power the Espruino using a 2 x coin cell battery holder (https://www.adafruit.com/products/783) which seemed to me more than enough (2 x 3V batteries so more than 5V). The red light on the relay does switch on, but it's more faint ; but the green lignt is hardly visible when the relay is supposed to activate, and I can't hear any 'click' sound any more, making me suspect that the relay can not draw enough power to act as supposed.

  Can anyone here please direct me to solve this?

  Thanks !

• Timer switch with Espruino board?

  @user57476 started

  • 3 comments
  • 1,540 views

  @user57476 replied
• Timer switch with Espruino board?

  in General • 8 years, 8 months

  

  Thanks a lot for this very complete answer Gordon.
  I'll share my results.
  J.

• Timer switch with Espruino board?

  in General • 8 years, 8 months

  

  Good afternoon,

  I'm a COMPLETE newbie in both Espruino and Electonics in general.
  My purpose is quite simple: I'd like to use the Espruino as a timer switch.

  More precisely, I have:

  1. a (JSON-formatted) list of timestamps
     
  2. a (completely independant, self-powered) circuit I'd like to close (I'd like to "put a wire" between two of its pins) for 1 second at those timestamps
     
  3. a battery holder (http://www.aliexpress.com/item/F04639-4-­AA-Battery-Box-Holder-of-Receiver-4-8v-W­-JST-connector-As-Ek2-0914/900092076.htm­l) with 4 AA batteries
     
     

  Is this feasible with Espruino?

  Many thanks for your help, or directions for help