The undervoltage tag has no wiki summary.
3
votes
3answers
220 views
Decoupling capacitor across Raspberry Pi GPIO input (+ Arduino + robotics)
I've been messing around with a robot kit from Parallax (the BOE Shield Kit), which has a 5xAA (7.2V?) power source. The BOE Shield includes its own 5V regulator, which is used to control servos that ...
0
votes
4answers
421 views
Undervolting PWM fan from 12V to 5V [closed]
What will happen if I feed a 12 Volts rated PWM fan with 5 V driving voltage?
Given all the other variables stay the same (PWM control signals) - will it reduce RPM? By how much?
What happens to the ...
5
votes
2answers
95 views
Scaling voltage to meet two conditions at once
I am using an IC (STM6600) which, among other functions that I need, is also capable of Undervoltage Monitoring. It works like this:
The IC monitors VCC in comparison to two thresholds, V_Low and ...
3
votes
3answers
984 views
Under Voltage Protection for LiPo Battery
I have a 3Cell LiPo battery which I am going to use with an RC Car, and I want to design a circuit to protect the battery cells from going under ~3.3v each. So what do you think of this design?
As ...
6
votes
4answers
131 views
Placement of undervoltage monitor and cutoff
Suppose I have a circuit running at 3.30V, supplied via an LDO regulator (e.g., ADP124), powered by a Li-ion battery. In other words:
Now, I would like to implement an undervoltage cutoff to "turn ...
2
votes
4answers
230 views
Possible to fry a circuit with a power supply under its current requirement?
I recently had someone explain to me that he was told he fried a laptop's hard disk by putting it in an external drive enclosure that was not rated to supply sufficient current. (Apparently the disk ...
-1
votes
3answers
245 views
How much negative voltage is too much for a µC?
I've been attempting to measure some stuff and trying to be careful about what I feed into my microcontrollers. I've had difficulty figuring out how to keep things within perfect limits, though.
For ...
1
vote
1answer
132 views
Safe operating area for different types of battery chemistry?
I'm trying to find the safe operating area for various types of batteries; in particular I need minimum and maximum termination voltages, although information on temperature / power / current is also ...
1
vote
2answers
189 views
Do LEDs Need UVLOs (Undervoltage-Lockouts)?
I'm currently working on a project involving (I think 3mm, 1.5VDC) Infrared LEDs. However, due to my photoresistor, I think the current, voltage, or whatever (forgot) will vary greatly to minuscule ...
2
votes
2answers
803 views
11-16V DC voltage stabilization for 13.8V powered ham radio
I am looking for any resources on how to construct a relatively high power (25A, 13.8V) voltage stabilizer (or voltage booster if you like) for my 13.8V powered ham radio.
The problem I try to ...
4
votes
4answers
2k views
how to build a low-voltage disconnect switch for DC 12.4V 70A?
How can I make a device that will make the power connected as long as the voltage of the power-supply keeps over 12.4 V (adjustable) and disconnect it if it falls below?
It also must connect the ...
10
votes
2answers
964 views
Circuit to protect against undervoltage?
What is the simplest way to regulate the min DC voltage in a circuit?
Is it possible to do with zener diodes?
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