Category Archives: Electronics

SMD Temperature / Humidity Sensor

I made a Printed Circuit Board (PCB) for a project that I have been working on that a temperature and humidity sensor. My initial PCB had mostly Surface Mount Devices (SMD) parts but three parts were discrete through-hole parts. Through-hole … Continue reading

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All SMD Radio Transmitter

In a current personal(1), i.e., not for sale or distribution, project I have been using a Chinese ASK radio transmitter module – the STX-882, which I posted about back in February of this year. The STX-882 works well BUT being … Continue reading

Posted in Arduino, Electronics, hardware, PCB Etching | Tagged , , , , , | 1 Comment

Chinese SOIC-8 test clips for in-Circuit Programming – Part 2

Last April I wrote about the cheap Chinese SOIC-8 test clips. In that post I primarily discussed the wiring – specifically that, as wired, it isn’t useful for in-circuit programming of the ATTiny85 SMD SOIC-8W chip. Ultimately, I rewired the … Continue reading

Posted in Arduino, Electronics | Tagged , , , , | 4 Comments

Macrofab Pick and Place (PnP) – musings

I have been doing some PCB SMT design using pcb-rnd with a goal of trying a board assembly shop.  I’ll do a few prototypes but that is all. Macrofab has enough recommendations for prototype quantities that I have been concentrating on … Continue reading

Posted in Electronics, PCB Etching | Tagged , , , , , | 2 Comments

COB Removal – Fail !

I have some  PCBs with a Chip-On-Board (COB) chip that I was curious about. A website stated that this COB contained a QX5252F chip but it was not stated how this was determined. I didn’t really believe it and decided that … Continue reading

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Caveat Emptor – SOIC8/SOP8 test clips

My mistake may benefit you if you are into budget surface mount PCB creation. I recently purchased an 8-pin  test clip for SOP8/SOIC8 surface mounted chips. My goal was to use my USBasp programmer to flash in-circuit ATTINY85-20SU chips. I … Continue reading

Posted in computer, Electronics, hardware, Test Equipment | 1 Comment

CE012 Step-Up Boost – What’s Inside?

I am getting ready to design a circuit using the ME2108A Step-Up voltage converter, but first I wanted to closely examine the CE012 Voltage converter that I recently posted about – HERE. Since Canton Electronic’s  CE012 module performed so well … Continue reading

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Manchester for Arduino

There are several Manchester Coding libraries for Arduino wireless transfer (See http://tinyurl.com/jh95cju), I have gotten two of them to work satisfactorily for communicating a single byte of data. Both the “Mchr3k” library “http://mchr3k.github.io/arduino-libs-manchester/” and cano64’s library “https://github.com/cano64/ManchesterRF” worked for singly … Continue reading

Posted in Arduino, Programming, software | 10 Comments

STX-882 / SRX-882 Radio Testing

I recently did some testing of the STX-882 433HHz transmitter and the SRX-882 433MHz receiver and, after additional tests, updated my original findings. I tested line-of-sight along a road. I performed two tests using Arduino NANOs and two laptops, shown … Continue reading

Posted in Arduino, Electronics, Programming, software, wireless | Tagged , , , | 1 Comment

A Tiny but Good Boost Converter

As I continue to experiment with voltage boost converters I was intrigued by some Chinese DC-DC Boost Converter modules. There are several different types and module configurations, depending upon the manufacturer and chip type. I opted to buy a couple of … Continue reading

Posted in Electronics | 2 Comments