Purpose of the project is to adjust existing board with speaker (board is connected to power outlet):
1. To add Dry Contact ON/OFF switch ( See point 1 on the sketch) (possibly to the speaker connection on existing board). When speaker is ON that will activate dry contact switch to be ON as well, when speaker is OFF switch to be also OFF. Dry Contact switch should be power isolated from dry contact on additional board i.e. cannot have power at the output, but triggers dry contact on the other board. (Preference is to use one dry contact switch for both existing and additional board if possible).
2. To add charging board ( see point 3 in the sketch) with rechargeable capacitor ( see point 2 on the sketch )(or at least two rechargeable AAA batteries) to serve as a backup in case of power outage. Capacitor needs to provide backup power to both existing board and one additional board. Voltage to the additional board have to be adjustable to 2.4V and to 3V and to Amperage of 800 mAh AAA battery. Power requirements of existing board to be determined.
Freelancer/Contractor needs to sign NDA before commencing the work and more details are provided, and (if needed) Freelancer/Contractor must be able to design and/or replace existing relatively simple board with speaker.
Note that additional board is currently using either 2.4V or 3V batteries and has to be adjusted to use US power outlet as a primary source of power (see sketch section "Current to improve in attachment Board_Dry_Contact2.JPG instead of incorrect one Board_Dry_Contact1.JPG initially posted) and rechargeable capacitor (or batteries as a backup).
12 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön
hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Kindly reply back and let us discuss project further. regards
Hello. The circuits that you have attached is really in low quality. I have a couple ideas how to solve your problem, but i should know the requirements for size and power consumption.
I am expert writer, good designer , engineer and programmer. i am sure i can do your task better than any other person. you will get 100% accurate work before deadline. kindly award me this project. thanks in advance.