Linked Questions
10 questions linked to/from RpiZero Power Supply through 40 pin Power/GPIO Header or microUSB connector
6
votes
2
answers
5k
views
How to make a splitter cable for the USB2 OTG port on the RPi 4B?
According to the answer to Where is the USB2 OTG port on the RPi 4 Model B located? the Raspberry Pi 4B has a "hidden" OTG port in the USB-C power connector. I found at Very simple OTG on pi4 and at 4 ...
- 42.7k
3
votes
1
answer
3k
views
Reducing sound noise when recording with Pi
I am sure everyone trying to record sound with a Raspberry Pi has experienced a lot of issues with noise pollution. Although there is any number threads on various forum adressing this I have yet to ...
3
votes
2
answers
2k
views
Using bypass capacitors to reduce voltage spikes and noise causing I2C read/write errors
I'm trying to communicate with an old i2c device and I'm getting wrong read values, and possibly even some incorrect write values too.
My logic analyzer shows random highs in the middle of a low.
...
- 371
3
votes
3
answers
1k
views
How can a 12VDC power supply stepped down to 5VDC for Rpi?
Good day,
I have a Raspberry Pi Zero W that I would like to deploy onto a tower that is supplied with 12VDC power from a photovoltaic solar panel.
I'm currently looking at powering the Pi Zero W ...
- 31
5
votes
2
answers
1k
views
Pin powered Pi crashes when servos move
I have been working on a circuit to power a Raspberry Pi and servo(s) from a single power source. The diagram below shows the basic configuration, although the 'AA battery' is actually two 18650s.
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1
vote
2
answers
426
views
powering a pi 3B using two 18650 batteries in series. what circuits do I need? [closed]
I have an raspberry pi 3B I want to use as the brains for a robot car. In my initial setup I used a power bank for the Pi and a powered the motors using a seperate pack of two 18650 batteries in ...
- 185
0
votes
2
answers
589
views
Voltage drop when RaspberryPi boots
Im trying to learn robotics with raspberrypi but im having a problem. I have 6 AA batteries in a batteryholder that are connected to a breadboard and with M-M jumping wires its connected to a LM2596S ...
- 51
1
vote
2
answers
226
views
Slight dip on the GPIO 5v line when LEDs are on
I have my raspberry pi set up to do two main things:
control 16 LEDs via 16 transistors each connected to an out pin. The LEDs are collectively fed the 5V from the GPIO.
power a chip also on the 5V ...
- 179
3
votes
2
answers
148
views
Should I tear apart USB PSU or get a dedicated switching PSU?
I'm going to be using an Pi-3B+ to switch an AC and a DC device using one of the popular relay modules. This whole project is going to go in a custom screw-together project box that will have AC input ...
- 145
0
votes
1
answer
292
views
Is it safe to put capacitor on 3v3 pin of raspberry
I am going to use INA220 ic for current monitoring, and the datasheet says:
Use a 0.1-μF ceramic capacitor for power-supply bypassing, placed as closely as possible to the supply and ground pins.
...
- 103