Fluke/Philips PM66xx Frequency Counter OCXO Upgrade
https://www.electronics-lab.com/flukephilips-pm66xx-frequency-counter-ocxo-upgrade/
In this post Dan Watson documents an OCXO upgrade board he designed for the Fluke/Philips PM66xx line of frequency counters. A few months ago I purchased a Philips PM6674 frequency counter on eBay. It’s an older 9 digit counter with two channels that has a maximum input frequency of 550MHz. The design feels dated compared […]
28.8MHz TCXO with +-1ppm Stability
https://www.electronics-lab.com/28-8mhz-tcxo-with-1ppm-stability/
Craig document his process of building a Better RTL-SDR TCXO with +-1ppm stability over 0C-55C range. Its hard to beat the cost and versatility of the ubiquitous RTL-SDR dongles, but the temperature stability of their reference oscillators isn’t sufficient for some applications. While the internal 28.8MHz quartz crystal in these units can be replaced by a high […]
Light To Audio Oscillator
https://www.electronics-lab.com/light-to-audio-oscilator/
Light Sensitive Audio Oscillator project is a fun loving project which will create different sound effects depending on the light falling on the sensor Specifications Supply input 5 ~ 12 VDC Output 8 Ohms, 0.5 W Speaker Terminal pins for supply voltage and speaker connection Power-On LED indicator PCB dimensions 38 mm x 44 mm […]
Epson develops compact atomic oscillator
https://www.electronics-lab.com/epson-develops-compact-atomic-oscillator/
Epson has revealed a new atomic oscillator to provide a better accuracy device for telecommunication networks. This new oscillator is using a special laser and IC that are developed by Epson. Seiko Epson Corporation has developed a small, highly stable atomic oscillator, the AO6860LAN, for telecommunications networks and industrial applications. The development of the new […]
Pulse Generator 555
https://www.electronics-lab.com/pulse-generator-555/
Pulse Generator project will generate a frequency in up to 180 KHz which can form a good test gear project. This project is based on the classic 555 timer IC. Specifications Input : 5-12 VDC Max @ 40 mA Provides Square Waves Range : Jumper selectable and preset tunable range of 1 Hz to 180 […]
Externally clocking (and overclocking) AVR MCUs
https://www.electronics-lab.com/externally-clocking-and-overclocking-avr-mcus/
by nerdralph.blogspot.ca: People familiar with AVR boards such as Arduinos likely know most AVR MCUs can be clocked from an external crystal connected to 2 of the pins. When the AVR does not need to run at a precise clock frequency, it is also common to clock them from the internal 8Mhz oscillator. Before CPUs were […]