FM stereo demodulation is accomplished by the use of the LM1800 phase locked loop, thereby eliminating the need for external coils. The AM function of the receiver is done completely with the LM3820 AM radio system. While designed for 3 section tuned superheterodyne application.The LM382 dual preamplifier was selected for its minimum parts count and low noise capability.
on: 5/16/2022
The purpose of this application note is to describe the operation and potential pitfalls of a 10V resolution (VREF = 100mV) 4 1/2 digit autoranging scheme using the ICL7103A/ICL8052A pair. Two auto-ranging circuits are included within the text. Each is discussed in terms of its advantages and disadvantages.
on: 11/2/2021
This application note describes a technique for auto-ranging a battery operated DVM suitable for panel meter applications. Also, circuit ideas will be presented for conductance and resistance measurement, 9V battery and 5V supply operations, and current measurement.
on: 11/1/2021
The Atmel 8-bit AVR RISC-based microcontroller combines 32 KB ISP flash memory with read-while-write capabilities, 1 KB EEPROM, 2 KB SRAM, 23 general-purpose I/O lines, 32 general-purpose working registers, 3 flexible timer/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, 6-channel 10-bit A/D converter...
on: 10/23/2021
Here is a practical application of the dual differential amp. This circuit is for DC or slow moving DC like Strain Gauge and transducer signals. The RC and Zeners are for protection and clamping. Why and how has been described in other posts here. The high impedance op-amp input cannot face the real world unprotected. OP07 is always the selection due to the low offset. When the sensor generates data in mV, you cannot afford any error introduced in this front end, right.
on: 7/26/2019
This is the full circuit of a V/F convertor interface for 80C31 SBC. The Mux is configured for selecting between two inputs. It uses analog switch 4066. LF353 along with LM331 form the VCO, you can further study such configuration in the Application Notes of TI/NS.
on: 7/24/2019
This is an example of a cascaded or sequential timer, here two CD4541 are forming a two stage timer. You can add more in a chain, but better to use a microprocessor or Microcontroller for such a purpose. But make sure EMI-RFI immunity is high for these circuits or wrong resets and sets can make a machine like an Oven or Environment Chamber malfunction and even ruin the job.
on: 7/24/2019
It is called analog dial timer as it has no digital display, but the chip is digital it is CD4541. It is Mains operated, you could make on-delay or off-delay. By changing the caps and resistors or with even dip-switches you could get timing of few seconds to many hours.
on: 7/12/2019
Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay, appointments. Run from the Startup folder, alerts.
on: 7/30/2026
wallabag can save and classify articles, Read later. Take wallabag everywhere. Multi Device and Multi OS. Can be setup on a budget shared hosting.
on: 7/28/2026
Publii makes website creation simple and accessible, flexible and powerful options to build and manage blogs, portfolios, or documentation websites.
on: 7/28/2026
A Warm White LED is great Feng Shui for a Hobbyistâs Desktop or Workshop. A DIY Table Lamp or a Lathe Lamp with these Warm LEDs create Positive Energy, for not just your Home but for the Entire Neighborhood.
on: 7/27/2026
Tutanota Email is a Free, open-source, end-to-end encrypted email software. Desktop Clients, Apps are available for most of the OS and devices.
on: 7/25/2026
Mojeek is an alternative search engine that puts the people who use it first. Mojeek Focus Dashboard for finer tuning.
on: 7/25/2026
TinyApps store data and settings in their own folder. Most of these types work on Linux with Wine. The install size is around 1MB.
on: 7/24/2026
Batteries should be shielded from Excessive Environmental Exposure. Heat, Direct Sunshine, Low Humidity, Flames, Brine, Ammonia, Alkali, Acid, Volatile Liquids.
on: 7/24/2026
When the smell of Ionized Air and Burnt plastic reaches your Nose; you need to check the Mains Plugs and Sockets of all heavy Electrical Appliances for Sparking.
on: 7/23/2026
Mains Extension Board or Power Strip even called Surge Protector Box ... needs to have a Good earth connection. These boards have to be checked, repaired and cleaned every year. Corrosion on the Earth socket or plug or a broken internal earth connection can damage your Equipment, Computer or Appliance.
on: 7/23/2026
RedNotebook desktop journal - It lets you format, tag and search your entries. You can also add pictures, links and customizable templates, spell check your notes.
on: 7/22/2026
An ideal SmartWatch is 2 inches tall by 3 inches wide. It is convertible, remove strap it is a SmartPhone, hook it to a Nickle Chain it becomes a SmartPendent. Its key capability is Streaming UHD Videos, never forget Dolby.
on: 7/21/2026
Open source, community-developed, content management system, written in PHP, and licensed under the GNU General Public License
on: 7/21/2026
Stephen Ostermiller has many interesting and innovative code that will help you learn the right way to write code in JavaScript or Perl . Some of the highlights are Scientific Calculator, Triangle Calculator, Contact Form, Tic-Tac-Toe Graphing Calculator Programs, Java Utilities, RSS Reader and Random Password Creator.
on: 10/10/2024
A Dual Pane file manager for Windows, a program like Windows Explorer to copy, move or delete files. However, Total Commander can do much more than Explorer, e.g. pack and unpack files, access ftp servers, compare files by content, etc!
on: 7/22/2024
A free viewer for multiple file formats. The goal of this software is to replace the multiple document viewers with a single one simple application. STDU Viewer supports TIFF, PDF, DjVu, XPS, JBIG2, WWF document formats. These are the most popular formats for scientific and technical documentation.
on: 7/22/2024