Example circuits for minimal power upon waking up in RP2040 microcontroller present in this app note from Raspberry Pi. Link here (PDF) Even in deep sleep RP2040 draws a typical current of ~180μA, and sleep current is very dependent on PVT: process (current varies from chip to chip), voltage (current varies linearly with voltage), and […]
Tag Archives: Raspberry Pi
Raspberry Pi floppy controller board
smbakeryt made a floppy controller for his Raspberry Pi: If there’s one criticism I hear more often than any other about the pi, it’s “I wish my Raspberry Pi had a floppy drive“. It’s really shocking that the pi doesn’t have the ubiquitous 34-pin floppy header that we all know and love. How else are […]
Supercapacitor uninterruptable power supply (UPS) for Raspberry Pi
smbakeryt built a couple supercapacitor uninterruptible power supply (UPS) prototypes for his raspberry pi projects: For my Convergent restoration, I decided to build an RASCSI to replace some failing SCSI hard drives. The RASCSI is a SCSI emulator built using a raspberry pi. Problem with these types of emulators is that if you carelessly power […]
The Hayes Chronograph, a remake for 2020
smbakeryt built his own Hayes Chronograph: I’ve always wanted a Hayes Chronograph, but have never been able to acquire one, so I finally broke down and just made my own. The Hayes Chronograph was a compliment to Hayes line of smart modems, and implemented a real time clock for computers that didn’t have a built-in […]
DIY long lasting voltage regulator circuit for Raspberry Pi
Jithin @ rootsaid.com writes: Raspberry Pi is simple, handy and cheap yet powerful single board computers of all time. It has USB ports to connect hardware such as pen drive, keyboard, mouse, HDMI port for display out, 3.5 mm port for audio and several GPIO pins to work with embedded projects, all of which can […]
Building a Raspberry Pi stratum 1 NTP server
A how-to on building a Raspberry Pi stratum 1 NTP server: So this article is going to be my notes on how I built one using a cheap GPS module off eBay as the reference time source and a Raspberry Pi. (a 2B in this case, but hopefully the differences for newer models will be […]
Raspberry Pi Controlled DC Load
Dr. Scott M. Baker has published a new build: In this video I build a DC Load that’s controlled by a raspberry pi. I’ve built dc loads before, but this time I decided to up the goal to supporting 100w (it actually handled 200w) using three mosfets instead of one. I drive it with a […]
24-bit stereo audio DAC for Raspberry Pi
Dilshan Jayakody has published a new build: This project is about 24-bit stereo DAC, which we build for Raspberry Pi boards. This R-2R ladder DAC is developing around Intel / Altera EPM240T100C5N CPLD. We developed this module after review the PT8211 DAC, which we tested a few months ago. Compare with PT8211 DAC, this module […]
Linear Nixie tube HAT for the Raspberry Pi
Mark Smith has been working on a HAT for the Raspberry Pi that can drive two IN-9 or IN-13 linear Nixie tubes: This project as described in www.surfncircuits.com came about because I needed a retro looking linear meter for my espresso maker water tank. I’m always running out of water in my espresso maker, and […]
The Script
Peter Scargill’s Script: Regular readers will know about the script that Aidan Ruff and I originally developed to put Node-Red and several other packages onto the Raspberry Pi for our own home control purposes. This has been developed with help from several people and in particular my friend Antonio “Mr Shark”. WELL – here is […]
Building a Raspberry Pi UPS and serial login console with tinyK22 (NXP K22FN512)
Erich Styger has been working on a UPS with the Raspberry Pi to cover a short power out: There are different ways to ruin a Linux system. For the Raspberry Pi which uses a micro SD card as the storage device by default, it comes with two challenges: 1.Excessive writes to the SD card can […]
The Nixie tube filadometer – a Nixie tube filament meter for your 3D printer
Dr. Scott M. Baker made a Nixie tube filament meter for his 3D Printer: First, I decided to upgrade from the Raspberry Pi Model B to a more recent Raspberry Pi Zero W that I had on hand. Wired Ethernet is so ~ 2013 after all, and wireless would be a lot more convenient. Next, […]
Open Trickler: The DIY smart powder trickler
Eric Higgins has a nice build log on his Open Trickler project a bluetooth-enabled smart powder trickler from off-the-shelf parts for under $60: Fundamentally, this is not a hard problem to solve. Read the value from the scale, run a motor that moves powder into the scale, turn off the motor when the scale reads […]
Raspberry Pi based indoor air quality monitor
Dr. Scott M. Baker made this Pi-based environmental monitor and wrote a post on his blog detailing its assembly: For years I’ve followed the “uRadMonitor”, a device that does air quality monitoring and radiation monitoring. I’ve played with geiger counter projects before and frankly found them to be not very interesting. However, the idea of monitoring […]
Simple I2S stereo decoder with amplifier
Dilshan Jayakody published a new build: In this project we build simple I2S stereo decoder with amplifier. To decode I2S data we use Princeton Technologies PT8211 16bit DAC. KA2206 audio power amplifier is used as driver stage of this system. Structure of this I2S amplifier is self-explanatory from the schematic. We select PT8211 and KA2206 […]
DakBoard family calendar with Raspberry Pi Zero W and Read Only filesystem
Scott Hanselman made this DakBoard family calendar with Raspberry Pi Zero W and wrote a post on his blog detailing its assembly: The implementation is simple genius. It’s a browser that starts up full screen (kiosk mode) and just sits there and updates occasionally. DakBoard provides the private webpage and tools to make that happen. […]
Making an e-Paper Etch-a-Sketch
Scott Baker has been working on making an Etch-a-Sketch using modern e-Paper displays and optical encoders: Above you can see my prototype. I’m using a 4.2″ e-Paper display from Gooddisplay, together with the Waveshare breakout board. I have a couple of ENS1J-B28-R00128 optical encoders that I attained on eBay. I specifically chose these encoders instead […]
Project PITA: Build a mini mass deauther using Bettercap and a Raspberry Pi Zero W
evilsocket shared a how-to on making a mini WiFi deauthenticator using Bettercap and a Raspberry Pi Zero W: A few days ago I started playing with some idea I had from a few weeks already, using a Raspberry Pi Zero W to make a mini WiFi deauthenticator: something in my pocket that periodically jumps on […]
Pocket Pi
A Raspberry pi zero w pocket terminal project from Facelesstech, that is available on Github: So if you have been following my blog lately you may have noticed me rambling on about trying to get a Xbox 360 chat pad and an ps3 keypad working with a raspberry pi to make a portable terminal. I […]
Tutorial: Setting up a low cost QRP (FT8, JT9, WSPR etc) monitoring station with an RTL-SDR v3 and Raspberry pi 3
A detailed tutorial on how to set up a cheap QRP monitoring station using an RTL-SDR V3 and a Raspberry Pi 3 from rtl-sdr.com This tutorial is inspired by dg0opk’s videos and blog post on monitoring QRP with single board computers. We’ll show you how to set up a super cheap QRP monitoring station using an […]