OctoSonar V2

OctoSonar 2.1

The OctoSonar 2.1 is an improved version of the popular OctoSonar, which allows you to drive 8 inexpensive HC-SR04 ultrasonic sensors from the I2C bus and one additional pin on your Arduino.

Improvements include:

Redesigned echo signal handling, eliminating interference from misbehaving sensors. Address pull-down resistors and larger address jumpers Compatible with […]

Permalinks on Tindie

Update: Tindie have added the “shortlinks” on the product list page in the store.

Tindie is an online store where electronics hobbyists sell their widgets and doohickeys. I recently started selling a couple of my products on this site and I am very pleased with the service they provide.

When selling your stuff online […]

Digital Knob for Arduino I2C – Absolute Encoder

What is it?

From the datasheet

“Until now, the choice of an absolute encoder meant an expensive, and larger sized product. Through the use of combinatorial mathematics, the absolute code pattern of the Bourns® Absolute Contacting Encoder (ACE™) is placed on a single track for a very economical, energy efficient and compact product. Bourns® […]

SMD Toaster Reflow Oven Build

SMD Toaster Reflow Oven – ready for test

I’m building an SMD reflow oven from an abandoned toaster oven I found in my garage. In my last post I described my adventures and innovations with sheet metal, ceramic insulation and Reflect-A-Gold tape. I think I did a good job with that.

Most of this […]

Reflow Toaster Oven Insulation Notes

click to see bigger images

I decided to make an SMD reflow oven from a toaster oven I found abandoned in my garage. There are many excellent build guides already on the web, so I’m not going to replicate them here, I’ll include links below. I did see some improvements I thought I could […]