electronics – Page 2

Voltlog #290 – Riden RD6006 Output Noise Using Recommended Power Supply NVVV S-400-60

Welcome to a new Voltlog, this will be a rather short video cause I will only be addressing one short subject regarding the Riden RD6006 ripple noise. In my review of this power supply in Voltlog #284 I did measure the output ripple but that was measured while using a transformer to power the unit.

That transformer has very little output noise so the results we obtain can be considered best case scenarios but this may vary in practice, especially if you are using the recommended switch mode power supply. The output of that power supply may not be as clean as the one from the transformer so in this video I’m going to measure the output noise with the switch mode power supply installed.

I’m using the recommended NVVV 400W 60V 6.6A rated power supply, this is what RuiDeng officially recommends to use with their power supply kit. In Voltlog 284 part 3 I took a look inside this power supply so I will link that video on screen if you want to check it out.

Voltlog #289 – InTheMail

I must say I’m noticing delays in delivery of these packages from China, it started with orders placed mid January and I’m probably going to see some packages lost and never delivered so i recommend you keep an eye on your orders and request a refund when the protection time expires.

Voltlog #285 – Is a Cheap Cordless Power Drill Any Good?

Is a cheap cordless power drill any good? That is a question I’ve been asking myself for a while now because I was in the market for a cordless power drill. I can get a well known brand like Makita which sells a kit with two 18V 3Ah batteries, the drill and a charger for about $200. The thing is I’m using a tool like this maybe once every 3-4 months for a couple of drills, generally soft materials or maybe to assemble some new piece of furniture and I don’t feel like spending $200 for a tool that’s not going to be used and worked for that money.

So I started looking at alternatives, there are the clones of Makitas and Dewalts available for probably less than half the price of the genuine stuff but why go that route? I don’t care about what’s written on the label and the color of the drill. One thing I care about is the shipping of the item, preferably I would like something that can be ordered and shipped from the EU for fast delivery and no additional taxes being paid for customs.

So I started looking at Chinese brands, this particular model got my attention on banggood.com, they call this a 36V cordless drill, it comes with two batteries and it’s available from a warehouse in the EU.

Voltlog #284 – Riden RD6006 Power Supply Review

Welcome to a new Voltlog, if you’ve been watching the channel for a while you might know I’m a fan of the gopher power supply units, I think they are great value for money, they’re simple and they have good specs, in fact I reviewed their latest revision in Voltlog #255 and it had very low noise at the output, even though it is a switch mode power supply. They’re pretty compact, they don’t take up much space on the bench so what’s there not to like about these?

But in recent years there’s been another company which has slowly built-up a name among hobbyists due to their really low priced power supply modules, the name of the company is RuiDeng and they’ve been selling these compact switch mode power supply modules for $20 to $30 for years. They were not great specs, the quality was not great, you needed an external power supply unit but they had a bunch of functionality built into that color TFT display and they were cheap so everyone gave them a try

Now RuiDeng has developed and released a new model RD6006 which resembles a real bench power supply. It has a bigger front panel and it comes with a separate enclosure and power supply unit which are optional.

Voltlog #283 – InTheMail

Welcome to a new InTheMail, the series that will touch both your passion for electronics and your bank account at the same time. Before I get started I’m gonna take a second to remind you to subscribe to the channel and hit the bell notification icon because that’s the only way you will know for sure when I upload new videos. I’m gonna start with an item that’s actually disappointing, this is a mini portable vacuum cleaner but I only realized this after receiving the item, because the seller of this item was advertising this as a dust blower vacuum cleaner, it’s the usual keyword stuffing that aliexpress sellers do.

Voltlog #282 – Did I get a trinocular microscope for micro-soldering and inspection?

Welcome to a new Voltlog, to save you from waiting, the short answer is yes, I did get a microscope for the lab but before I show you the microscope let’s talk about why I got a microscope and why you might want one. If you are occasionally soldering boards, electronic kits, mostly through hole components or even surface mount down to 0603 and you have good eyesight, then chances are, you don’t need such a microscope, I’ve been doing that for years.

On the other hand, if you want to be able to solder surface mount components smaller than 0603 comfortably or you want to do board level repairs on modern gadgets like smartphones and laptops, then you most definitely need a microscope as it will massively improve the quality of your soldering and the general repair process at your bench.

Voltlog #280 – TPS62840 olmBoard Ultra Low Power Step Down Converter

Welcome to a new Voltlog, in this video we are taking a look at the TPS62840 ultra low power step down converter from Texas Instruments. It’s basically a buck converter with an input voltage of 1.8-6.5V, 750mA output current, with a quiescent current of just 60nA and active current of just 120nA. It also features very good efficiency at light loads of just 1uA it can offer 80 percent efficiency.

Other features include 16 selectable output voltages through an external resistor and a stop pin which when activated will completely stop any switching to eliminate any switching noise for a short moment, allowing you to take for example an ultra low noise measurement during that time. During that take power will be sourced from the output capacitors. So it looks like this is a pretty interesting dc-dc converter, with really nice features and it’s optimized for ultra low power devices.

Voltlog #279 – InTheMail Stats For 2019

Welcome to a new Voltlog, as you may remember last year I did a summary of all the orders placed in 2018, related to electronics items, the stuff that I show in my InTheMail segment. I did that video because I was interested in knowing the numbers and how they evolve over time but the viewers responded as well, they provided feedback with their own approximate stats so this year I’m doing it again. Same as last year, please let me know in the comments if you have any stats on your own purchases.

Voltlog #278 – InTheMail

Voltlog #276 – What Is The CO2 Concentration In Your Home?

Welcome to a new Voltlog, in the previous video I showed how I built this monitoring system for CO2, it’s based on an ESP32 development board and it uses two sensors the MH-Z19B and the CCS811. In that video I explained the differences between these two sensors so please watch that to better understand the current video and the conclusions presented here.

I’ve let the system run and collect data for the past few days and now we can take a look at the data and draw some conclusions which might help you decide what sensor to use in your future projects or it might determine you to build a similar data logger to check the CO2 levels in your home because I assure you if you do not have a ventilation system, chances are you are sleeping in some high CO2 concentration levels.