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Tested Circuits and Projects (257)

These circuits were tested and worked properly!
Browse through a total of 257 tested and working circuits and projects! Now you can build these projects with trust knowing the fact that all are working properly.

Building a Smart Master/Slave Switch

T.K. Hareendran - 12/06/17

Here is an inexpensive and easy-to-build master/slave switch for integration into powerstrips for the automatic switching of “slaves” [...]

Hacking a Camera Shutter with Infineon TLE94112LE and Arduino – Part 2

Enrico Miglino - 11/30/17

Part 2 - Arduino Software This is the second part of the "PONF" series. For those that are [...]

Home IoT – Voice Controlled Lab Lights with Amazon Alexa and ESP8266

Brent Voltz - 11/20/17

I recently won an Amazon Echo in a BBQ cooking competition and I was eager to get it [...]

Hacking a Camera Shutter with Infineon TLE94112LE and Arduino – Part 1

Enrico Miglino - 11/16/17

Part 1 - Reverse engineering and hardware design This is the first post of the "PONF" series. I [...]

Building a DIY LED Ring for DSLR Camera

Enrico Miglino - 11/06/17

LED Ring for a DSLR Camera For me, when I start a new project, I am not interested [...]

USB Power Testing With an Arduino Controlled Dummy Load Project

T.K. Hareendran - 11/01/17

One part that I find myself using somewhat regularly in microcontroller-based experiments is the “USB power bank” that [...]

Getting Started with BLE and Arduino

T.K. Hareendran - 10/24/17

The MLT-BT05 is a readily available, inexpensive Bluetooth 4.0 module based on the Texas Instruments CC2541 Bluetooth Low [...]

Electronic Products Review Roundup

Rich Quinnell - 10/11/17

  If you like the work that T.K. Hareendran has been doing here, you should check out his [...]

Open-Source Light Meter

T.K. Hareendran - 09/20/17

Light meters, these days, are no longer a mystery: From home-improvement stores to eBay and Amazon you can [...]
arduino with keypad

Arduino with Keypad Tutorial

T.K. Hareendran - 11/25/15

A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad [...]
Input Offset Voltage Test Schematic

Test Op Amps Via Simple Input Offset Voltage Measurement

Jim Keith - 10/04/15

Measuring this one vital parameter (Input Offset Voltage) provides a simple means of determining if the DUT (Device [...]
Static Reversing 3 Phase SSS Schematic

Static Reversing the 3 Phase Induction Motor

Jim Keith - 09/27/15

This solid-state thyristor (SCR) switch circuit is perhaps the simplest means of reversing a 3 phase motor. “Static” [...]
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