Author: mixos
230V AC dimmer, mains isolated, using PIC12F629
This is a very simple mains isolated dimmer with a triac output (phase control). It uses timer0 to do the timing. There is no user interface, the value of the triac ignition delay after a zero crossing is defined by setting the reload value of timer0 (Tmr0) in the software...
Continue ReadingShort circuit tracer uses low power
Dan Meeks shares his design idea on edn.com: This Design Idea presents a low power short circuit finder that capitalizes on the ear’s sensitivity to changes in frequency. The heart of the circuit is a voltage-to-frequency converter (based on Linear Tech’s AN45, Figure 13, by Jim...
Continue ReadingL293D Motor Direction Controller
baelza.bubba @ instructables.com show us how to build a DC motor direction controller using L293D. I designed this DC Motor Direction Controller so that I could give direction control to DC motors that I am building into mini tools (drill, lathe, table saw, solder smoke extractor,...
Continue ReadingConvert $2 LED Lamp to $50 Smart Lamp
taifur @ instructables.com show us how to convert a simple LED lamp to a smart one that can be controlled using a smartphone. A smart bulb is an internet or Bluetooth-capable LED light bulb that allows lighting to be customized, scheduled and controlled remotely. Smart bulbs are...
Continue ReadingDIY USB 5V Solar Power Bank
Abdulgafur tipped us with his latest project, a 5V solar powered power bank. The circuit consists of two stages, the first stage is the battery charger stage based on MCP73831 and the second stage is the step up converter based on LT1302-5 which converts the battery voltage to...
Continue ReadingRubidium Disciplined Atomic Clock
Cameron Meredith build a real-time-clock module controlled by a rubidium frequency standard, and since it also includes a GPS clock he can track local time dilation effects by comparing the two. An I2C multiplexer board allows for more than one RTC module (Since these have a hard...
Continue ReadingKeep Tabs on the Devices Connected to Your LAN
Would you like to monitor all the devices connected to you LAN. Then you can do it using a Rasberry Pi Zero and a few LEDs. Like most people, we have tons of things connected via WiFi to our router. Be it AppleTVs, Rasberry PIs, Amazon Echos, weather stations, overhead airplane...
Continue ReadingWireless temperature and humidity monitor for baby’s room
This project describes a DIY wireless temperature and humidity monitor for kids’ or infant’s room using the Arduino platform, and inexpensive and easily available ASK transmitter/receiver modules. On the transmitting end, an Arduino nano senses the ambient room temperature and...
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