Tag: tester

When you buy any small development board, one of the first things you try is interfacing the programmable NeoPixels. One such example we saw was in the case of Raspberry Pi Pico, which interfaced the NeoPixels using the programmable IOs. If you have been following the maker community,...

In this circuit we use the output signal from a standard IR receiver (IC1 in the schematic of Figure 1) to drive a miniature loudspeaker. The IR receiver from Vishay used here is available for various frequencies ranging from 30 to 56 kHz. A large number of IR remote controls operate...

This article describes a simple continuity tester based on an ATtiny85. The tester features a buzzer that sounds to help you determinate the trace continuity. It is designed for checking circuit wiring, or tracing out the tracks on a PCB. According to it's author David Johnson-Davies it...

Velleman Inc., a producer and a distributor of electronics, has produced a new handheld oscilloscope with the same power of its HPS140, but with smaller size and modern design. HPS140MK2 is a 11.4 x 6.8 x 2.2 cm versatile component tester that fits in your pocket. This small...

TallMan's lab @ runawaybrainz.blogspot.com build a nice looking and simple analog ESR capacitor meter based on a EEVBlog forum topic. I finally got round to making my capacitor ESR tester this week after finding a nice simple 5 transistor version by EEVBlog member Jay_Diddy_B....

mozzwald.com has designed an iphone battery charger /tester. I have seen technicians often replace batteries when they may not necessarily need to be or ignore the fact that they could be the cause of the issue at hand. To remedy this I designed a basic iPhone battery charging...

davedarko wanted an easy way to check a USB cable, so he created this project: A little ATtiny45, some LEDs and transistors – battery powered. It scans through the cable with some blinking LEDs, then goes to sleep. USB Cable Tester -...

David @ robotroom.com build a microcontroller based LED tester with LCD display that shows the LED voltage, the current limit in mA, the desired led voltage and the calculated resistor value. The LED tester is based on ATtiny84 mcu which performs all the measurements and calculations...