CyberDeck ZBS

Recycled cyberdeck made from old project Raspberry pi Zero Boot System @ Facelesstech: So when I redesigned my ZBS (zero boot system) I decided to also make a thinner version of my portable raspberry pi setup. This worked out great and I used it to develop the raspberry pi add-ons and the software for the […]

DIY ARC reactor CPU performance monitor, powered by an Arduino

Michael @ the-diy-life.com posted detailed instructions of how to build your own Arc reactor CPU performance monitor: In this project, I’m going to be showing you how to turn one of these popular DIY arc reactor kits into a useful Arc Reactor CPU performance monitor for your computer. It plugs into one of your computers […]

DIY home made portable oscilloscope

An ATmega328 based portable home made oscilloscope with ADC from Creative Engineering: It is basically a small scaled digital oscilloscope. It is capable of displaying all type of waveform like sine, triangular, square, etc. It’s bandwidth is above 1 MHz and input impedance is about 600K. The device is mainly using the ATmega328 micro-controller as […]

DIY Arduino RC receiver for RC models and Arduino projects

Dejan @ howtomechatronics.com shows how to make an Arduino based RC receiver: Now these two devices can easily communicate and we can use them for controlling many things wirelessly. I will explain how everything works through few examples. In the first example we will use this Arduino RC receiver to control a simple car consisting […]

Experimental motor driver for CG-4 German equatorial mounts

Dilshan has published a new build: This is an experimental stepper motor driver for Celestron CG-4 German equatorial mounts. This unit is functionally equivalent to the Celestron dual-axis motor driver, and we developed it as a replacement unit for the original Celestron driver. See the full post on Dilshan Jayakody’s blog. Project files are available […]

High-voltage FLASH programming on ATTINY85

ATTINY85 High-Voltage Flash programmer @ td0g.ca: The Atmel ATTINY85 is a great chip (cheap, easy to use, supported in the Arduino IDE). Unfortunately it only has 5 IO pins, which limits its usability. There are guides on using a High-Voltage Programmer (HVP) to change the Reset pin into an IO pin. However, that prevents you […]

Signal generator control project

VE3POA published his DIY signal generator control project: I built a step attenuator, highlighted in 2 previous posts, and quite some time ago I experimented with the AD8307 logarithmic amplifier chip and have a couple of prototype circuits for measuring low power signals sitting around in the junk box. I have the prototype SigGen as […]

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 my own 50Ah LiFePO4 lithium battery pack

Kenneth Finnegan posted his DIY 50Ah LiFePO4 lithium battery pack build: Several years ago, I had purchased a 20Ah 12V Lithium Iron battery pack from Bioenno for my various 12VDC projects. To help protect it, I ultimately built it up into a 50cal ammo can with a dual panel-mount PowerPole connector on the outside, which […]

DIY 18650 Powerwall with onboard BMS

A DIY 18650 Powerwall with onboard BMS @ openhardware.co.za While I cannot afford a Tesla PowerWall, I’ve spent some time drawing up a PCB to house 7x 18650 cells in series. Each board has onboard Battery Management: *Overvoltage Protection (per cell) *Undervoltage Protection (per cell) *Balance Charging *Overcurrent Protection *Main pack Fuse The design files […]