Tag: Reference

Voltlog #173 – µAmp Current Source

Welcome to a new voltlog, today we are taking a look at a very interesting item that was sent in by a viewer of the channel. Fabian who is from Romania sent me this microAmp current source that he designed and built himself. Even though he built only a few units by hand it looks professional and you must have noticed the resemblance with the uCurrent built by Dave from eevblog, but that gadget is used to measure small currents while this one is used to generate small currents.

Link to the uAmp Current Source on Tindie

 

Voltlog #166 – LRC Reference Box (Hao QI Xin)

In this video we are taking a closer look at the Hao QI Xin LRC Reference Box which contains a couple of polystyrene capacitors, a vishay precision resistor and an un-marked inductor. I also talk about getting the AD584 voltage reference box, however it is hard to find the LH version as most seller will be sending you the KH version which is a lower grade of stability.

Here are some links mentioned in the video:

Voltlog #67 – Precision Current Reference Using REF200

A while ago I watched a video from Scullcom Hobby Electronics channel where he build a precision current source, a very simple but accurate one. If you don’t know this channel I encourage you to subscribe to it, it has allot of nice videos on lab equipment either building DIY versions or reviewing existing ones. Each video has nice drawings and the guy clearly knows what he is talking about so a great resource for learning.

I don’t have any current source in my lab, and these are useful for testing multimeters for example. I was looking on ebay for a current source but I wasn’t able to find an affordable one so I’ve decided to build one using the project information from that video and I will link the video in the description below, it’s nice to watch it has lots of interesting explanations so I won’t repeat them in this video, I will mostly focus on showing you how I build and improved my current source.