Tagged Questions
1
vote
1answer
86 views
Electrical saftey of metal panel-mount DC jacks
Context:
I have a robotic arm with a series of servo motors, that together draw up to 3A from my bench supply (depending on the load on the servos). To make it easier to transport the robot around, ...
10
votes
3answers
42 views
How much current can I draw from the Arduino's pins?
What's the maximum amount of current which I can draw from each of the Arduino's pins without tripping any of the internal fuses? Is there a limit per pin as well as an overall limit for the whole ...
3
votes
1answer
95 views
Safely testing a DC supply with an unknown output configuration
This picture shows the connector for the DC end of a power supply I extracted from a dead HP MFD (Multi Function Device):
As you can see it consists of 4 pins in a 2x2 configuration. The sockets ...
10
votes
2answers
1k views
Is it safe to disassemble an unpowered PC power supply?
Once a typical PC power is unplugged, is there any danger of receiving a shock while disassembling it? Are there typically high voltages stored that one should be aware of?
context: removing a ...
0
votes
3answers
471 views
Issues with resistor heating, for an LED?
I am direly confused on this. I've used 220 Ohm resistors in the past for all of my LEDs (at least that I can remember), however nothing on my arduino+breadboard with a few leds on the 5V breadboard ...
3
votes
2answers
182 views
cable jacket melts
I am new to hardware.
My breadboard just arrived and I am trying to light up my LED. I used computer power supply for power (red wire for + black for -) and used strands of LAN cable for connect LED ...
9
votes
7answers
845 views
What if I overload a cheap AC adaptor?
I'm experimenting with PIC microcontrollers and various related circuits both on plugboards and simple homemade PCBS.
I'd like to use various old AC power adaptors I have lying around to power my ...
