In my previous two posts, I talked about how I wanted to increase the output voltage of my booster circuit. While I don’t have the surface-mount resistor to make this happen, I did find the right through-hole resistor in a big bag of assorted resistors I bought at Radioshack a while back. So, onto the circuit board it went!
The results are quite good. While the theoretical output was 5.3V, actual output was about 5.15V under load as long as I had a good power source. The data pin voltages read 1.9V and 2.65V, which apparently was within tolerances because my iPhone happily sucked out 800mA. The 2.65V data pin is still a bit of a concern (I’d like it to be in the 2.7-2.8V when the output voltage is over 5V), but I’ve got replacement components to boost that voltage on the way too.
Also, my laser-cut bamboo enclosure prototype shipped today! Assuming that it works as expected, I’ll have a prototype that has looks and specs similar to the final production version by the end of the week. Just in time too. The deadline to apply for a booth at World Maker Faire is this weekend. Of course, I’ll be making a video too.
