Part of My Other Works and DIYs
In this page, I list some of my works and DIYs. Some of them were made when I was in high school, others were made when I was in university.
Something I made when I was a high school student
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A High Voltage Generator
This is a high voltage generator that can output 1200V high voltage. I made this because my physical teacher wanted me to give a lecture to all my classmates, and I used this to illustrate how a fluorescent lamp works.
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A 100mW audio Amplifier
This is a 100mW audio amplifier using some common NPN and PNP transistors. When I was a high school students, I liked piano music, I downloaded a lot and I used this small amplifier to amplify them and enjoy them.
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A Digital Timer
This is a digital timer. It can be used to control a fan or a lamp or something.
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A 3V~30V Switching Power Supply Module
This is a switching power supply that I used to power most of my DIYs. At that time, I don’t have a commercial regulated DC power supply, so I made this. It’s noticeable that I even made the inductor myself. I coiled the wire on a ferrite core to made this inductor, it works well!
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A 3V~15V Power Supply Module
This is another power supply module that I made. It uses a adapter as a power, it converts the 18V input to 3V-15V output. Since it has a adapter, it’s easy to use.
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A Solar Energy Harvesting System
This is a solar energy harvesting system. It has a 10W solar cell panel, it can be used as a charger since it has a 5V USB output. It also has an adjustable output that can output a maximal 12V voltage. Besides, it has a overvoltage protection circuit.
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A Audio Recorder
This audio recorder can record 30s audio and replay it at any time.
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A Static Detector
This is a static detector, it can be used to detect objects that have static if you don’t want to be shocked. It also can be used to detect the thunder, when there is a thunder, the needle will shake.
PCB Layout
The following photo shows some of pcb I designed, including phase-locked loop, rf amplifier, mixer, am receiver front-end and so on.
A 2.4G Wireless Transmitter and Receiver
These are 2.4GHz wireless transmitter and receiver, it can be used to control remote devices or transmit and receive data.
A Temperature Regulator
The temperature regulator uses a DS18B20 as a sensor, it have a keyboard and socket. When the temperature reaches the limit, the regulator will cut off the power supply and until the temperature falls below the limit.
Signal Generator
This is a simple signal generator, I made it when I was a sophomore. It can output sinusoidal wave, square wave and triangular wave with frequency range from 0.01Hz ~ 100KHz. The signal generator features DDS to generate signal, MSP430F5529 is used to control two pieces of DAC0832.
LC Meter
The LC meter can test inductor with inductance from 1uH to 10H, and capacitor with capacitance from 1pF to 1F.
Resistance Meter
The Resistance Meter can test resistor with resistance from 1ohm to 10Mohm.
Network Analyzer 1
This Network Analyzer is used to test the frequency response of a system. The testing frequency range is 1Hz to 1MHz.
Network Analyzer 2
This Network Analyzer is used to test the frequency response of a system. This one is different from the prior one because it must be connected to an oscilloscope to see the results.
Dual Power Supply Module
This power supply can output up to ±20V@1A.
Others
