Thanks to the MSP430 used inside, In this video I calculate the MS6612 light meter should get up to 470 hours of continuous usage.

100w VHF / UHF LCD PIC16F88 SWR Meter

Measuring SWR at VHF/UHF frequency was never fun. Most radio amateurs just assume that their 50 ohms cable is matching a beam or GP. Analog SWR Meters are widely spread on the market, although, not very economical. LCD meters are a bit expensive, crossing the $100 limit.

So the purpose of this project is to encourage radio amateurs to build their own High Quality LCD SWR Meter at a low price, instead of buying expensive ready made units.

100w VHF / UHF LCD PIC16F88 SWR Meter: [Link] [via]

June 1st, 2008

68HC908QY4 Distance Meter

68HC908QY4 Distance Meter

This project demonstrates the use of 161 line LCD module to interface with Nitron 16-pin MCU, 68HC908QY4. The MCU uses internal oscillator, internal reset, so we need only to supply the +VDD and VSS. The sensor inputs are PTA2 for reed switch contact and PTA0 for 0/+5V analog input. You can use +9V battery or 1.5Vx3 AA battery to power the circuit.

68HC908QY4 Distance Meter: [Link]

 LC Meter based on PIC16F84A without LCD LC Meter based on PIC16F84A with LCD

This is one of the most accurate and simplest LC inductance / capacitance Meters that one can find, yet one that you can easily build yourself. This LC Meter allows to measure incredibly small inductances starting from 10nH to 1000nH, 1uH to 1000uH, 1mH to 100mH and capacitance from 0.1pF up to 900nF. LC Meter’s circuit uses an auto ranging system so that way you do not need to spend time selecting ranges manually. Another neat function is the “Zero Out” switch that will reset the initial inductance / capacitance, making sure that the final readings of the LC Meter are as accurate as possible.

LC Meter based on PIC16F84A: [Link]

April 26th, 2008

DIY G-Force Meter

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The purpose of this project is to build a device that measures acceleration/tilt on one axis (backward/fordward) capable of fitting onto the dashboard or hanging onto the window of a standard car. The device will have 3 7-Segment LED Displays to show the instantaneous acceleration measurement to 2 decimal accuracy.

DIY G-Force Meter: [Link]

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