Mostly build Smart Domino board top.

I received my boards from the DorkbotPDX group order. While the purple solder mask is “interesting”. The board quality is beautiful. This was the first SMD soldering I’ve ever done. I started with tinning the pads with my normal iron and normal solder. I wanted to try that and see how it compares with solder paste I’ll use later. Then I put some tack flux on top of the solder with a …

Read More

First Smart Domino prototype board.

I got a kick out of the Le Dominoux project for the 555 contest. I thought about making a few to mess around with. This would be a good project to practice some manual SMD soldering skills. I haven’t worked with SMD at all. (Yes, I know that the Le Dominoux was through hole constructed, but I planned on mine being SMD.)

I priced SMD, resistors, caps, LEDs, and 555s. Then I wondered how …

Read More

3.3V LDO Regulator soldered to USB jack

The AVR ISP II is a device to program an AVR microcontroller using a 6 pin header in a circuit. It does not contain any capability to power the circuit being programmed. This could be very handy.

Dave Jones at the EEVBlog has a video about adding power to the ISP cable, using an LM317 to provide both 5V and 3.3V. The issue with this, as he stated, was that the …

Read More