Oct 19
Layering different simple systems together to perform one complex task is really at the heart of what engineering is all about. In this project we show how it is possible to utilize different technologies and piece them together to controll an inxpensive RC Car, with an iPhone. With the NerdKit serving as the bridge between the computer and the R/C Car, it is as an example of how useful microcontrollers can be when they serve as the glue that makes complex systems work together, and how with an understanding of microcontrollers a neat system like this one is achievable as a Do-It-Yourself weekend project. ..
iPhone-Controlled R/C [Via]
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Oct 19
I started with a PicKit1. After using it for a while I moved on to this PicKit 2 PIC Microcontroller programmer. I have always loved this programmer, having a USB, a button, a couple LEDs, a potentiometer and a seperate ICSP programmer unit. It is also very fast. But, like I’m sure many of you, I quickly out-grew my PicKit2 programmer. There just isn’t enough real-world stuff on it. So I decided to add some. I have included pictures of all the things I added, and you can click on any of them to see an enlarged picture. ..
PicKit 2 PIC Microcontroller programmer [Link]
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Oct 14
This kit combines an LM317 with a thumbwheel potentiometer to allow you to easily set the output voltage from 1.5V up to 2V less than the input.
Features:
- Stable, low-noise output adjustable from 1.5 to 30V
- Supplies up to 500mA
- Preset outputs of 5V/9V/12V
- Integrated heatsink
dc power supply KIT - [Link]
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Oct 14
Circuit Operation : The heart of the circuit is the LM35 temperature sensor which is factory-calibrated in the Celsius (or Centigrade) scale with a linear Degree->Volt conversion function. The output voltage (at pin 2) changes with temperature from 550mV (-55oC) to 1500mV (150oC). This greatly simplifies the thermostat design as we only need to provide a precision voltage reference (TL431) and an accurate comparator (A1 of LM358) in order to construct a complete thermostat. The preset (VR1) & resistor (R3) form a variable voltage divider which sets a reference voltage (Vref) form 0V ~ 1.62V. The op-amp (A2) buffers the reference voltage so as to avoid loading the divider network (VR1 & R3). The comparator (A1) compares the reference voltage Vref set by VR1 with the output voltage of LM35 and decides whether to energize or de-energize the relay
Electronic Temperature Controlled Relay - [Link]
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Layering different simple systems together to perform one complex task is really at the heart of what engineering is all about. In this project we show how it is possible to utilize different technologies and piece them together to controll an inxpensive RC Car, with an iPhone. With the NerdKit serving as the bridge between the computer and the R/C Car, it is as an example of how useful microcontrollers can be when they serve as the glue that makes complex systems work together, and how with an understanding of microcontrollers a neat system like this one is achievable as a Do-It-Yourself weekend project. ..
