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Posts Tagged ‘test equipment’

Small USB to PTT/CW adapter

Friday, December 22nd, 2017

Mare writes, "In this post, I will first introduce some of the basic technical background of the control of the transmit signal (PTT) and other signals (eg CW or linear activation). The second part will describe the  interface development and the final product." More details at Mare & Gal Electronics...

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Posted in Interface | No Comments »

Mini CW Keyer / QRSS beacon v1.1

Tuesday, March 1st, 2016

Marko Pavlin has designed a PCB for the CW keyer, he writes: I designed dedicated PCB for the CW keyer. The project is very similar to the version made on prototyping board. Here are the updates: - I added relay and optocoupler for PTT control - The “CW melody” selection pins...

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Posted in PCBs | No Comments »

Arduino waveform generator

Saturday, June 22nd, 2013

Chris from PyroElectro constructed this waveform generator using an op-amp, resistor ladder, some trimpots and an Arduino. You can find all the information on how to make your own step-by-step with photos, schematic and code at PyroElectro. Via the contact form.

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Posted in Arduino, tools | No Comments »

Easily measure inductance using Arduino

Thursday, July 21st, 2011

Moser from ReiBot has developed a simple project for using an Arduino along with an LM399 and several discrete components to measure inductance. He says: So you need to make or measure an inductor, but you don’t have an oscilloscope or signal generator? Measuring inductance with a handful of cheap...

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Posted in Arduino, code, how-to, measurement | 3 Comments »

Mini AV tester in Altoid’s tin

Thursday, March 17th, 2011

Chris from PyroElectro was looking for a way to miniaturize his previous VGA test box to make it more suitable for portable use. He came up with this design for a Mini AV Test Box for portable testing of VGA displays and speakers. His project fits a full fledged AV...

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Posted in PIC, testing, tools | 1 Comment »

Attiny2313 based LAN cable tester

Saturday, January 15th, 2011

Vasilis Stergiopoulos has built a RJ45 LAN cable tester. The circuit was originally designed to use a 555 and 4017 IC, but Vasilis has published the schematic and source code in assembly for using the Attiny2313 instead. The Attiny2313 produces successive outputs at port D, where the LAN-cable is connected....

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Posted in testing, tools | 1 Comment »

Recent Comments

  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
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  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...
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