Weidmüller 1469530000 and TMR 1212

To build or to buy?

MicroCrystal RV-8803 – A Really Accurate RTC June 17, 2019- RTC chips traditionally were the domain of Maxim and NXP. Switzerland-based MicroCrystal recently made quite a buzz with its RV-8803, which offers simple integration, an I2C interface and extreme accuracy. Let us start out by looking at a system overview. Figure one shows how this I2C RTC is made up internally – interested observers note […]
Analog Devices’ LTM2887 – If a Digital Bus Needs Galvanic Isolation June 15, 2019- In theory, digital buses are intended to connect things to one another. Sadly, one sometimes wants but a logical connection – in many cases, galvanic isolation helps out. Should you ever feel like isolating very fast buses, definitely give the LTM2887 a chance. From a technical point of view, Linear Technologies attempt at entering the […]
AVAGO APDS-9008 or APDS-9005-020 – Keeping an Eye on Ambient Light June 14, 2019- Recent times saw quite a bit of interest for part numbers such as the APDS-9008 or APDS-9005-020 – they are a very interesting type of ambient light sensor. One of the oldest questions in regards to light sensors involves their spectral sensitivity. If a part is to output but one voltage level, the conversion between […]
STMicroelectronics’ LIS2DH12 – Low Power Motion Sensing June 12, 2019- Apple’s iPhone introduced gyroscopic sensors to a wider range – before that, accelerometers were not commonly found in consumer hardware. STM sells excellent parts which, however, get little media attention – time to take a look at the LIS2DH12. Integrating the part into your circuit as an MPU6500 alternative or MPU9500 alternative is not difficult. […]
Panasonic AMG8833 – FLIR for cheap June 7, 2019- FLIR made infrared thermal sensors cool – sadly, their parts are all but cheap (and suffer from export control problems). Panasonic’s Grid-EYE family is a low-resolution alternative which comes at significantly lower cost. From a technical point of view, Panasonic’s image sensor could not be simpler. We are looking at an 8×8 sensor with an […]
DipTronics DTS-62R-V – Small Switch, Very Big (and Very Cheap) June 5, 2019- When yours truly was but a lowly cadet, various US manufacturers produced (pricey but quite reliable) switches. Chinese vendors recently started to catch up – seeing the DTS-62R-V top our customer interest list shows that the run stage of the crawl-walk-run cycle is reached. DipTronics has been around the Asian switch market for ages, exhibiting […]

Power supply design has always been a bit of a topic – long-term followers of the OEMsecrets article series know that repairing TMI usually starts out with power supply trouble. Due to that, buying an off-the-shelf module can be attractive. Here are a few parts which caught our eye recently.

From Germany with love…

One part which caught lots of attention recently comes from Weidmüller – the company is usually known for its easy-to-insert connectors commonly found on 3D printers. The designation reveals a relatively uncommon part – feast yourself on figure A.

Weidmüller 1469530000 Product Shot

…Not cheap, but a real stress-saver

While three-phase current systems might not be an electrical engineer’s everyday fare, one still meets them quite often – designing a power supply for them is an especially hairy affair due to the tremendous amounts of power which can be set free if something does go wrong. Weidmüller offers the part in various output modes – the example we picked here provides a neat 5A and 24V.

…and in a compact form factor


Should you ever feel bad about your DC-DC converter design skills, fret not. Traco Power’s TMR 1212 family is a series of SIP modules which act as buck or boost converters – impressively, they can also be used to split up a single supply into multiple different rails.

All of this is accomplished with an efficiency ranging from 75 to 85% – dedicated converter designs might be a bit more efficient, but also headaches when sourcing coils and other parts. Furthermore, the SIP module “stands” on your PCB – you need to give up but 2 square centimeters of space if one of these modules happens to find its way into your circuit.

Was it worth it?

Before leaving you with these parts, allow us to impart some stranger thoughts. CUI – the company is well known for all kind of mechanical gadgetry – published an excellent whitepaper comparing bought and self-developed solutions. It can be accessed at by clicking here – simply scroll to the bottom and download the full PDF if you want to find out more…