eeADAM

Adam schoenwald

An Implantable MEMS Drug Delivery System for Alzheimer’s Disease Management

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One of my first classes when I returned to Grad schools was MEMS (Microelectromechanical systems). The course consisted  of a variety of MEMS topics, including microfluidics, sensors, batteries, gyroscopes, and many others. In class we generally discussed a relevant research paper and then went over related theory and principals each class, but the majority of […]

RGBLED Update: R1 PCB Aseembly Code

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I assembled two of the RGB LED boards and mounted them on some 20mm extruded aluminium for testing. Here is picture of them on the aluminum, and a closeup of the assembly.             I found that 6-32 nylon screws are almost a perfect fit to hold down the LED, but […]

First Attempt at Reflow

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While somewhat intimidating at first, it turns out reflow is actually really easy compared to hand soldering each part. First you apply solder paste to the pcb, I used a stencil for this that I got from www.oshstencils.com . I held down the stencil with some tape and spread out the paste. I ended up with a […]

RGB LED Driver

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Project Overview Goal: Drive high power RGB LED pixels (350mA each channel) with control over each pixel and color. The LED:  I bought 15 of these a few years ago , http://www.dx.com/en/p/3w-led-emitter-on-star-multicolored-rgb-4530 . It is a high power RGB LED on a metal core PCB. Here are the specs: Red: 2.5V ~ 3.0V, 350mA Green: 3.2V ~ […]

BTLE 4.0 to 900Mhz Project Overview

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This is my Bluetooth 4.0 to 900Mhz mesh network bridge. Here is a quick summary of what it will do. I plan to use this design as a development platform. There is plenty of room for code, and potential applications are starting to pile up. Possible applications so far are home automation, weather stations, boat monitor […]

Revision 1: PCBs, Parts, and Stencil Ordered

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Going into this project I knew two things. I wanted a radio, and I wanted the PCB to be full of parts. I decided to make something with a BTLE (Bluetooth 4.0)  radio so I could control it with my phone. After looking at a few BTLE chips, I decided on the Nordic Semiconductor’s nrf51822. […]