Here’s a cheap and simple Laser Power Meter LPM for small power source, based on “MarioMaster LPM meter” by Davide Gironi: This type of meter uses a ThermoElectric Cooling module (TEC) to measure the power of a laser. The TEC will absorb the laser light, and transform the heat generated by the laser beam to an […]
Tag Archives: meter
Keithley 197 teardown and repair
Teardown and repair of Keithley 197 by Kerry Wong: After the meter arrived, I did a quick sanity check and everything appeared to be working fine except for those four silicone rubber momentary buttons on the left. The meter itself was well within spec as you can see from the picture shown below using the HP6113A 5V […]
Digital light meter using Arduino and BH1750FVI sensor
Raj writes that he’s just finished new project a digital light meter using Arduino and BH1750 sensor. The meter can display light intensity in both Lux and Footcandles: A light meter is a device that measures the intensity of light. It finds applications in schools, hospitals, production areas, passageways and more to measure and maintain […]
Open source micro-ampmeter with autorange
Here’s an open-source micro-ampmeter with autorange. It can measure current from 0.05μA to 10mA. It’s designed on a single layer PCB, making it easy to build with DIY etching techniques: The micro-ampermeter described here is intended for experimenting with low-power devices. I have just a general multi-meter in my home lab, which is not very […]
Steampunk network bandwidth meter
Want to see your PC stats in Steampunk style? How about an analog bandwidth meter hack. Ian made a USB analog gauge using a PIC 18F2550 and custom circuit at DIY Life. Thanks McZ! Original at Gizmodo.