I intend to use only one power supply for my project. It can supply 5A of current (though, my max load would need 1,6 so I am good whith the amount of current)
The question is what step down units are recommended so I could make 4,5 , 6, and 9V outputs.
I have no expiriance with voltage divaders so before I purchased some parts I would like to know downsides of different devices :
All epoxy sealed containers with Waterproof Housing; Light compact, convenient to use and transport; Non-isolated High efficiency:>96%; Reliable, low heat dissipation max. 40 ?; With overload / over-current / over / low voltage protection, stable performance. Auto recovery Specifications:
Input range: 8~23v Output voltage:9V Output current/power:3A Efficiency: ?96% Weight: 30g Size(LxWxH): 26×36×21(mm) Cable length: 100mm
Testing numbers: 12V to 5V/2A: Efficiency = (5.00 * 2.000) / (12.00 * 0.894) * 100% = 93.2%
2V to 5V/4A: Efficiency = (5.00 * 4.000) / (12.00 * 1.782) * 100% = 93.5%
12V to 5V/6A: Efficiency = (5.00 * 6.000) / (12.00 * 2.705) * 100% = 92.4%
12V to 5V/8A: ( A serious decline in the efficiency, Severe fever) Efficiency = (5.00 * 8.000) / (12.00 * 3.680) * 100% = 90.6%
3- [ Feature: Input voltage: DC 7-20V Output voltage: DC 5V Output Current: 1A (can work at 1A for long time) Rated continuous current: 1A Output power: 5W rated continuous
4- What about this? (I guess it woun't do a job alone)
Product Name Positive Voltage Regulator Model L7812CV VRRM 12V IR(AV) 1.5A Pin Length 13mm / 0.511" Pin Spacing Pitch 2.5mm / 0.098" Body Size 16 x 10 x 5mm / 0.6" x 0.4" x 0.2"(L * W* T) Hole Diameter 3.6mm / 0.14" Color As Picture Show Weight 4.7g
Three-terminal positive regulator are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Output Current up to 1.5A. Thermal Overload Protection . Short Circuit Protection. Output transition SOA protection.
I am sure there are plenty of other options.
I guess it's all about resistors ( pull down) which means they will use some current all the time. That means heat too but I guess I can live with it. I use my device once a week and it's on just for a 4 hours.