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projects:powermiser [2016/03/14 10:26] (current)
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 +
 +=== Synopsis ===
 +
 +Powermiser is a wall/bench mounted plate that provides a button you can push in a deadmans switch style to get 15mins of power from a GPO socket. Repeat presses will increase the timeout in 15 min increments to a maximum at any moment of 60min. Time remaining is indicated by 4 RGB LEDs and alarms sound at programmed intervals. Countdown can be increased to the maximum at any time.
 +
 +This aims to solve 2 problems:
 +
 +  * Unused GPO's get turned off saving power
 +  * Requires a person to attend the powered devices at a minimum of once per 60min, which removes ability for things like cnc devices or 3d printers to be left unattended.
 +
 +Timer settings might be customised per installation via dip switches or headers.
 +
 +=== Parts List ===
 +
 +  * [[http://​www.ebay.com.au/​itm/​Single-Double-Wall-1-2-3-4-Gang-Light-Switch-Power-Point-Socket-GPO-/​370876681993?​pt=AU_Building_Materials&​var&​hash=item5659f90f09&​_uhb=1|Blank Wall Plate]] //x1// $1.95
 +  * [[http://​www.ebay.com.au/​itm/​5-Pcs-N-O-2-Lug-Terminals-SPST-OFF-ON-Red-Momentary-Push-Button-Switch-/​390867702865?​pt=AU_B_I_Electrical_Test_Equipment&​hash=item5b0187d451&​_uhb=1|Red Momentary Switch]] //x1// $0.42 (To increase time)
 +  * [[http://​www.ebay.com.au/​itm/​10-Pc-AC-15A-250V-125V-20A-ON-OFF-SPST-Snap-in-Neon-Lamp-Boat-Rocker-Switch-/​331236178728?​pt=AU_B_I_Electrical_Test_Equipment&​hash=item4d1f36fb28&​_uhb=1|Red Toggle Switch]] //x1// $1.05 (For complete circuit isolation)
 +  * [[http://​www.ebay.com.au/​itm/​Solid-State-Relay-SSR-25DA-25A-250V-3-32VDC-for-Temperature-Controller-HOT-NEU-/​360500084185?​pt=AU_B_I_Electrical_Test_Equipment&​hash=item53ef7abdd9&​_uhb=1|SSR]] //x1// $3.74
 +  * [[http://​www.aliexpress.com/​store/​product/​P9834-F5-5mm-straw-hat-RGB-LED-with-P9823-chipset-inside-full-color-frosted-voltage-step/​312912_1709721555.html|RGB LEDs]] //x4// $1.20
 +  * [[http://​www.aliexpress.com/​item/​AC-90-240V-110-220V-to-DC-5V-1-5W-Voltage-Converter-300mA-Isolation-Switching-Power/​1947181456.html|5V PSU]] //x1// $4.94
 +  * [[PowerMiser.html|CPU Attiny85]] //x1// $3.50
 +  * [Misc Electronic Passives] $2
 +
 +**TOTAL: <$20ea**