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How to check Leakage LEDs in a LED Matrix
Is there any method to check the leakage LEDs in a LED matrix? I’m building my own matrix by using unbranded cheap Chinese OVAL LEDs. They have no datasheet/specs.   *Some...
Wed. Mar 21, 2018 - 10:28 AM
LED Matrix Double Buffer
I’m going to implement a double buffer for LED scrolling message display project to make a smoother animations without any artifacts. Because If I move a single LED I see like 2...
Mon. Mar 5, 2018 - 05:23 AM
DS1307 Groundplane
Guys I'm designing a breakout board for DS1307.I'm going to use cheaper phenolic copper boards (brown colour ones). I'm confused with the layout diagrams of the datasheets...
Sat. Apr 15, 2017 - 02:39 AM
Transformer 25VA
Guys I have a transformer named as 25VA.It has two 12V tappings on secondary. See the attachment how I have configured.   I want to know how much current I can get from this...
Sun. Mar 19, 2017 - 02:59 AM
Decoupling Capacitor..!!
What is best out of these two for decoupling?   Value 104 (0.1uF) Ceramic Disc Capacitor or Multilayer Ceramic Capacitor?
Sat. Nov 12, 2016 - 10:22 AM
NRF24L01+ Reliability
Guys I made a wireless link using two NRF24L01+ & two MCU units.I want to toggle the receiver side LED bulb when the transmitter side switch presses.   *...
Tue. Oct 25, 2016 - 08:44 AM
AT Commands Programming Structure
Guys I'm interfacing a GSM modem with a micro controller.I need to make a neat code Technic to place the receiving characters from the modem.   Let say I need to dial a phone...
Tue. Aug 2, 2016 - 08:44 AM
Capture Infrared Signals
I am trying to make an universal infrared receiver using a general MCU pin .I use a TSOP1738 reciever. I measure every high and low signals timings and stores them on GP...
Sun. Oct 18, 2015 - 01:46 AM
GSM Module Help - SIM900A
I want to make a call & send ASCII characters via a GSM modem.   Can this be done using SIM900A GSM modules?   I don't want to do this by sending SMS AT commands. I...
Wed. Nov 26, 2014 - 06:08 AM
L293D With PWM
I'm using L293D with two DC 5V motors. I use the two ENABLE inputs feeding from two PWM inputs.PWM frequency = 200Hz. L293D power from 5V supply.Vcc2 = 6V for motors in L293D. The...
Tue. Aug 5, 2014 - 04:45 AM
DS1307 Read Vs Time Error
Guys I have made a clock using the DS1307 & microcontroller software based I2C. The clock is working. But I'm reading the DS1307 every second & update the display. I have...
Sat. Dec 21, 2013 - 02:55 PM
AC Current Measure Circuit
Guys I need a small circuit that it will detect 230V AC current & when it reaches a specific amount it will make logic high. Ex:If the load reaches 230V/1A then it will make...
Wed. Jul 10, 2013 - 02:24 PM