The Spectrums of Three Cheap Laser Pointers
A couple of months ago, I converted my EP200Mmd monochromator into a scanning monochromator and tested the spectrums of quite […]
Interfacing HDC1050 with Arduino
Recently, I got my hands on TI‘s HDC1050 low power, high accuracy digital humidity/temperature sensor chip. The supply voltage of […]
Direct Measurement of the Speed of Light using a Cheap Laser Diode – II
In my previous blog post, I discussed the basic TOF method for direct measurement of the speed of the light. […]
Direct Measurement of the Speed of Light using a Cheap Laser Diode – I
Speed of light c in air can be measured either directly or indirectly. There are many ways to infer c […]
Testing Unknown Transformers with Function Generator
Last week, I posted a YouTube video explaining how to use a function generator to test an unknown transformer. I […]
Keithley 706 Scanner Teardown
I bought this Keithley 706 scanner on eBay a while ago. This scanner can take up to ten different scanner […]
Yet Another Scanning Monochromator Build
A while ago, I saw a video on the signal path in which Shahriar modified his Verity EP200Mmd monochromator/detector and […]
LM2596 DC-DC Converter Module Testing
LM2596 based step-down DC-DC converter modules can be bought on eBay quite cheaply for around a dollar each. But how […]
Teardown of a Cisco CSS 11503 Content Services Switch
This old Cisco switch was on its way to the dumpster at my work place, so I thought I would […]
Oscilloscope Probe Rise Time Testing
In this blog post, I compared the rise time of four oscilloscope probes of various bandwidths using an avalanche pulse […]
Wavetek 859 50 MHz Pulse Generator – Reparied
During the teardown of my Wavetek 859 pulse generator last week, I pretty much concluded that it was beyond economical […]
Wavetek 859 50 MHz Pulse Generator Teardown
In this blog post, let us take a look at a Wavetek 859 50 Mhz pulse generator. This pulse generator […]
PPS-2322 Performance Verification and Automatic Fan Controller Design
As I mentioned previously, Amrel PPS-2322 (dual 32V/2A) does not have a fan controller so the fan is on whenever […]
Amrel PPS-2322 Programmable Power Supply Teardown
I picked up an Amrel PPS-2322 programmable power supply from eBay recently. You probably have not heard of the Amrel […]
Guarding Explained
In electronics, guarding is a technique typically used to prevent or minimize current leakage from a high impedance source. This […]