A simple pcb to control ac relay
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Description
I need a simple pcb to control an AC relay.
-- MCU: esp8266 (esp12f)
-- Relay must be solid state in nature (triac) and should have enough current rating so that it works for 100-240VAC 50-60Hz 16A Single Phase AC Line (appropriate heatsink provision must be made if required)
-- micro SD card interface
-- UART Interface to load firmware and app code (RTS and DTR must be connected to ESP just like NodeMCU DevKit to allow easy flashing)
-- Power Supply for the board: must be drawn parallel from the same AC line it is controlling. Can use off the shelf supplies (like Hi-link 3.3V or custom designed, whichever is cheaper)
-- 2 Bi color (Red, green and orange) indicator LEDs
-- 1 push button for manual control of relay
-- the pcb must operate 24x7 without any glitches
-- There is a scheduled software reboot everyday around 12.05am. If the relay GPIO is "HIGH", that state must be maintained across reboot (perhaps using a capacitor)
-- rough board dimension
l x b x h => 5cm x 2.4cm x 4cm (even smaller is always welcomed!)
Attaching ROUGH prototype's eagle schematic pdf for MCU pin connections. Connections are made as per NodeMCU DevKit not raw ESP12F. Mapping must be made accordingly using this link (https://nodemcu.readthedocs.io/en/master/en/modules/gpio/).
Required Files: Schematic, Board, Gerber and BOM. Total BOM cost must be <= $13.
**Software already ready, only need really compact pcb design**
**** Thank You all for your overwhelming response. Unfortunately I can accept only 1.
Ritesh T.
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if the board has to run 24/7 without a problem... why do you require a reboot every 24 hours?
Also what do you want, you say the software is written, but the spec here is vague to say the least. You talk about wanting a PCB designed but ask for firmware tasks. Do you want a prototype built?
Do you need a WiFi operated switch? or are you choosing a cheap processor?
Note: Any firmware downloads HAS to follow the method set by the chipset (and the code already present). You can't get around that.
I have experience in what you want to do. Clarify what you want and I will give you a good quote.Ritesh T.03 Apr 2018I'm sorry if my description is not up to the mark. And yes, hardware wise it would be a simple wifi switch. I am trying some p2p stuff on the software side. Also the software has been kinda squeezed into it due to limited RAM, hence need the reboot everyday to make the cron system pick up schedules only for that day. And yes I get that, I don't ask anything on the firmware or app side, just proper wiring of DTR and RTS to GPIO 0 so that flashing and loading code is easy.
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Hi, is there any restriction on board size?
Ritesh T.02 Apr 2018Yes, updated the description