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High Voltage input ac breakers
1. I am using a lithium ion battery charger.   2. Its bit expensive, & in field one of it got failed. I checked its input ac side board gets burned out due to over...
Monday, 3 July 2017 - 06:30
How to do Alpha-numeric using a 4x4 keypad arduino non blocking
New thread created from https://www.avrfreaks.net/forum/s...     Algorithm for Alphanumeric keypad   1. My above posted code is working fine. This works fine if...
Friday, 30 June 2017 - 11:11
Solved: 4x4 keypad arduino non blocking
1. I am using ATMega 2560 arduino board & want to interface 4x4 keypad in it. It has lots of other peripherals like graphical lcd, relay, 3 uart peripherals. SO bit of large...
Wednesday, 24 May 2017 - 12:54
IRFP4668PbF Suitability in application
1. I have a application in which mosfet is used as switch. Max VDs = 84Vdc Max Id = 100Adc continuous & 150Adc for 10sec Load is motor Used 12 IRFP4668PbF in parallel. Vgs =...
Sunday, 21 May 2017 - 17:09
Diff between 4 pin & 3 pin mobile battery
1. I have attached a pdf file in which there is 4 pin mobile battery (first 3 pages) & then 3 pin mobile battery(next 3 page). 2. I have to replace 4 pin battery to 3 pin...
Thursday, 27 April 2017 - 10:32
Rs485 common ground or not
I had a confusion on whether in RS485 common ground is required or not? I have a slave side & a master side. As far as I understand when master & slave communicate, there...
Thursday, 13 April 2017 - 02:21
I2C to RS485 converter
1. I need a I2C to RS485 converter. Preferred is hardware based solution so that no MCU programming is required & low power since system is battery powered.  2. I2c...
Tuesday, 11 April 2017 - 05:42
Calculate Cable thickness depending upon current
1. I have bought a low cost ac-dc charger from China. It is from 220Vac/50Hz to 54.6Vdc/20V charger. It dont have any manual or wiring diagram with it. It has five connections:...
Tuesday, 28 March 2017 - 04:58
6V/20W Bulb charger & battery design
1. Have to design 1 hour backup for 6V/20W  bulb. Have to design a UPS based system. Bulb: http://www.amscope.com/20w-6v-ha...   2. What I am thining of using one of...
Monday, 20 March 2017 - 13:23
Stackable Battery Management System(BMS); Automotive grade
I want to design an stackable automotive grade BMS which can go upto 800V & so. Recently I have made a 48V/100A system but it is not stackable and automotive grade.   New...
Wednesday, 22 February 2017 - 16:21
Make a USB charge point from DC input
I have to make dc charge input from two options below, so that any mobile or related device can be charged: 1. Input: 17.5V-29.4Vdc    Output : 5V/1A for USB charging...
Thursday, 16 February 2017 - 16:42
From 40V-100Vdc to 8V-12Vdc to 5Vdc
1. I have a voltage range of 40V-100Vdc & have to make 5vdc from it and power a microcontroller with it. Max current is 700ma. 2. Since have to measure analog so I want to...
Monday, 13 February 2017 - 03:01

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