[OpenTRV-dev] OT: GSM remote control in car

[Bo Herrmannsen]

its a sim900 based module and datasheet says 2A at max...

how do i calc how big the cap needs to be for every X sec i want the
cap to power it? it not its quite extreme but better be safe than
sorry

the module runs at ~4.8V, but need to check the regulator on the
mega2560 based board the module mounts in to

2015-03-03 17:10 GMT+01:00 Adrian Godwin <EMAIL ADDRESS HIDDEN>:
> Probably a cap and diode will fix it. Measure the current the GSM module
> takes (while transmitting) to be dure. If not, use a tricklecharged battery
> When you turn the starter, the battery voltage can fall very low and may
> well drop below what the module power supply needs.
>
>
> On Tue, Mar 3, 2015 at 3:56 PM, Bo Herrmannsen <EMAIL ADDRESS HIDDEN>
> wrote:
>>
>> Sorry for the Off Topic
>>
>>
>> But i have on the shelf a gsm remote control i build last year... it
>> works fine but as soon i start the engine the GSM module goes
>> disconnects from the cell network
>>
>> i could just power that off and turn it on should it loose connection
>>
>> but i wondered if a fix could also be a big cap and a diode ? or maybe
>> a small lithium pack and a small charge circuit?
>>
>> /bo
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