Reddit reviews HOTSYSTEM DC12V 20A Round Rocker Toggle Switch ON-Off Control SPST LED Illuminated 3Pin Triangle Plug for Car Motorcycle Boat Marine Truck Trailer Auto and More (Green,10-Pack)
We found 2 Reddit comments about HOTSYSTEM DC12V 20A Round Rocker Toggle Switch ON-Off Control SPST LED Illuminated 3Pin Triangle Plug for Car Motorcycle Boat Marine Truck Trailer Auto and More (Green,10-Pack). Here are the top ones, ranked by their Reddit score.
Designed to connect and disconnect an DC12V 20A electrical circuit at will,SPST:ON-OFF control.LED lamp will be lighted up when the switch is turned on.Fits into a 3/4" hole.And it comes with a keyhole slot to prevent unwanted rotation.Coppery pin is connected to the battery negative pole,the next pin is connected to the battery positive pole,the last one is connected to the equipment positive pole.Suitable for almost any motorized vehicle such as car,truck,boat,atv,motorbike etc.Can also use these on water dispenser, running machine,electromobile and other household appliances modification.
shopping list for DIY;
http://www.amazon.com/gp/product/B00I11MV52
http://www.amazon.com/gp/product/B00GWF22KS
http://www.amazon.com/gp/product/B007B8JMZI
http://www.amazon.com/Energizer-A23-Battery-Volt-Batteries/dp/B00ICS8OF0/
+whatever LED circuit you want.
The lower DPST switch is an off-the-shelf power switch with an integrated LED that I will be using for master system power. The row of switches will be a DIP switch initially, to allow you to dial your current in quarter mA increments, although if I could come up with a rotary switch solution I might switch to it.
I have also bought an in-line analog current meter that goes to 3mA that I will use for at least the prototype, but the 'production' one probably won't have it as long as the dip switched CRD's are consistent and reliable.
All credit goes to http://speakwisdom.wordpress.com/2013/04/02/a-very-simple-current-regulated-tdcs-device/ for the idea and the stolen image.
By the way, if anyone is curious, here's my parts list:
Part with Link|# Per assy|cost/ea|cost/assy
:--|:-:|:-:|:-:
10PC New 16A 12V Round Rocker Toggle Switch Green LED SPST For All| 1| $0.69|$0.69
10 Pcs 2.54mm Pitch 8 Positions 16 Pin Blue DIP Switch 8P| 1| $0.54|$0.54
DC 3mA Analog AMP Current Panel Meter Ammeter Gauge 85C1| 1 (optional)| $7.37|$7.37
50PCS J500 Manu:SI/VISHAY Encapsulation:TO-92,Current Regulator Diodes|8|$0.58|$4.64
As you can see from the list, I'm making more than one of these--my whole office heard the Radiolab podcast and as the designated nerd, asked me to Make It So.