The supply tag has no wiki summary.
-1
votes
0answers
31 views
Are all 12 v dc batteries the same? [closed]
I have this pool skimmer that has 2 motors on a floating boat thats skims the top of the pool as it cleans. It uses a 12 v NiCad rechargeble pack. When it died I bought a 12V Lithium ion batter pack ...
-2
votes
1answer
64 views
Power supply for my c-pap [closed]
How long will my truck equipped with dual 750c.c.a.batteries power my c-pap machine that draws 90 watts using a portable power inverter and say a 50' extension cord. Thank you so much in advance of ...
3
votes
2answers
109 views
Splitting a power supply between two circuits
I have two separate circuit boards (clock & radio) that I'd like to place within the same enclosure. One takes 12V, and the other needs 3V. How can I utilize one AC adapter to power both boards ...
2
votes
2answers
74 views
Using 2 different LDO with the same voltage in the same application
I'm using a Raspberry Pi and have designed an extension board (Like the Pi-face) but I have a question about the power supply. I need 3V3 on my board, but the 3V3 from the Raspberry is not strong ...
0
votes
1answer
70 views
Reduce heating in linear power supply
I have a linear regulator in a product which works from 20 to 240VAC: a two stage linear regulator. Stage 1 converts to 18V and stage 2 to 5V. Stage 1 starts heating up as the input voltage increases ...
1
vote
0answers
73 views
How to properly turn off a Raspberry Pi when instant plug-out is a criteria [duplicate]
I want to create a stand-alone internet radio device. Therefore I want to use an existing subwoofer box with connected speakers. Inside the subwoofer box there is the electronics for the sound system. ...
-4
votes
3answers
92 views
DC supply voltage divider [closed]
I want to divide a 25volt DC supply to 12 and 12 volt DC.
Is there any way to do this?
-4
votes
2answers
127 views
AC to DC power supply [closed]
I am trying to make an AC to DC supply to run my motors,
motors needs 12 to 24 volt and 1.6 amp current.
So i used a transformer(output 12 volt, current 1.5-1.8 amp) ,then a full wave bridge ...
1
vote
1answer
62 views
Upgrade cheap power supply
I want to power my project(AVR uC + RF transceiver) with a fake iPhone charger whose internal is the same as this one, but with a smaller input and output capacitor. I therefore suspect that the ...
2
votes
2answers
100 views
Mains on a single core wire?
I have some single core wires normally used in simple breadboard circuits to handle 5V.
I have built a power supply circuit on a perfboard, with a standard transformer + capacitor + 7805 build. Can ...
0
votes
0answers
86 views
ULN2003a and Relays
Hi! We need help for this problem.
This system is about switching relays. We are using one 6V relay for the six loads for the light breaker 1 and light breaker 2.
The light breaker 1 relay and ...
-3
votes
4answers
146 views
12VDC power supply question
I have a 12VDC 500mA power supply and I want to power two (2) separate items, by using a "Y" adaptor. The first item is supposed to use this exact power supply, but the second item tells me to use a ...
2
votes
1answer
105 views
Restoring old SR-50 Calculator, odd Charger Voltage
I have an old Texas Instruments pocket calculator, for fun decided to get it working again. It is strictly a NiCd powered calculator, no alkaline recommended.
The charger is the 9130, says output 6 ...
-1
votes
1answer
73 views
Powering 2 circuits with the same power supply [closed]
I have a casio keyboard that runs off 6v and i plan to run it through a velleman voice changer kit that runs off 9v and then finally through passive tone circuit. I was wondering, what is the best way ...
0
votes
0answers
71 views
Reccomended power supply for Arduino [closed]
I am building a Arduino-based MIDI controller. The components used are 5 4051 multiplexer chips to read 31 potentiometer, 6 4021 shift registers for 48 button inputs, 4 74HC595 shift registers for ...
1
vote
1answer
174 views
10V DC Power Supply help
I've been researching power supply design techniques and information for the last few days and feel like I have a good understanding of how this is to work, but I can't seem to get my simulation to ...
1
vote
2answers
149 views
Automobile Project (Electrical Parts Requirement)
I'm looking at putting together a circuit board to be used in an automobile. It will only be connected to a 12 V and ground. Everything else will be internal to my board.
I was planning on putting a ...
0
votes
2answers
83 views
DC Power Supply Safe Ranges
I have a portable clock radio that uses two 1.5v batteries, [3v total, obviously], & has an optional 3v, 300ma, [center pin -], DC adapter input on the side. I found a 3.7v, 340ma DC adapter at a ...
2
votes
1answer
173 views
SMALL BOX Solution - To control/reduce power consumption in household electrical appliances?
We use multiple power sockets to power different house hold electrical appliances like.. AC, Refriegerator, Television and Other Electrical Appliances. I want to turn on/off their power ...
0
votes
2answers
253 views
Power a device from 12v adapter instead of ac wall adapter
Specifically, I have an Alarm Clock iPod dock with speakers that gets its power from ac wall adapter, but is only providing 12v. Is there an adapter to go 12V to 12V that will power this?
I want to ...
1
vote
1answer
156 views
AC / DC Backup Power Supply For Solar Irrigation Pump
I think this technology exists but I don't know what the device is that I need to do the job.
I need a DC Power supply that will pull input 110V - 220V AC (for here or international) and will output ...
2
votes
1answer
74 views
Tesla coil RF line protection
I'm making a modest Tesla coil powered by an automobile ignition coil. All the instructables online say that I must also protect my home's 120 volt A.C. mains with an RF line filter. Trouble is, no ...
0
votes
3answers
291 views
Use transistor to auto swap power source
Basically I'm looking to use a simple transistor circuit to diconnect one V+ (or ground) when another is connected and automatically switch back when the switching source is removed.
Like having a ...
0
votes
1answer
300 views
Driving a power transistor with 2sc945
I'm designing a simple 15V to 5V DC voltage feadback mode non SMPS regulator.
I'm using E13007E2 power NPN switch mode transistor. And to drive that transistor
I'm using C945 another transistor.
...
