bornach, 1 month ago to instagramreality

#Fake operational transconductance amplifiers I bought on #EBay over 6 years ago. Date code doesn't make sense given that Intersil discontinued the #CA3080 over a decade ago. The real chip should have a diode across pins 4 and 5. Only one chip seems to have it -- but it is reversed. The rest have resistors between pins 1 and 4, and between 4 and 5, consistent with an op amp that provides offset null pins. Pin 8 also seems to be connected. Both 1 and 8 should be NC.
#electronics #opamp

itnewsbot, 10 months ago to Worldbuidling

An LM386 Oscillator Thanks to Tungsten Under Glass - Once ubiquitous, the incandescent light bulb has become something of a lucerna non... - https://hackaday.com/2023/08/10/an-lm386-oscillator-thanks-to-tungsten-under-glass/ #positivetemperaturecoefficient #automaticgaincontrol #classichacks #incandescent #oscillator #wienbridge #mischacks #feedback #tungsten #lm386 #agc #ptc

itnewsbot, 1 year ago to random

Spy Transceiver Makes Two Tubes Do the Work of Five - Here at Hackaday, we love following along with projects as they progress. That’s e... - https://hackaday.com/2023/05/19/spy-transceiver-makes-two-tubes-do-the-work-of-five/ #continuouswave #transceiver #radiohacks #oscillator #vacuumtube #sidetone #spyradio #amateur #mixer #relay #ham #cw

alda, 1 year ago (edited 9 months ago) to javascript

As a practice in using the JavaScript Audio API, including oscillators and timings, I created this text-to-bleeps modulator about half a year ago.

It supports both Bell 103 and RTTY Baudot.

Write things. Make bleeps and bloops out of them. Have fun.

https://aldavigdis.is/modem-bleeper/

#JavaScript #oscillator #teletype #modem #beeps

itnewsbot, 9 months ago to retrocomputing

Clock Hack Gives DEC Rainbow a New Lease on Life - In retrocomputing circles, it’s often the case that the weirder and rarer the mach... - https://hackaday.com/2023/09/12/clock-hack-gives-dec-rainbow-a-new-lease-on-life/ #retrocomputing #arduinohacks #rainbow100-b #oscillator #pacemaker #arduino #si5351 #parts #clock #dec

itnewsbot, 8 months ago to amateurradio

Altoids Tin Spy Radio Goes Solid State - [Helge Fykse (LA6NCA)] has a type, as they say. At least as far as radios are conc... - https://hackaday.com/2023/09/21/altoids-tin-spy-radio-goes-solid-state/ #amateurradio #transceiver #radiohacks #oscillator #lowpower #si5351 #ham #qrp

itnewsbot, 3 months ago to hardware

No Inductors Needed for This Simple, Clean Twin-Tee Oscillator - If there’s one thing that amateur radio operators are passionate about, it’s the s... - https://hackaday.com/2024/02/18/no-inductors-needed-for-this-simple-clean-twin-tee-oscillator/ #oscillator #mischacks #hardware #feedback #twin-tee #mcp6002 #filter #op-amp #notch #rc

itnewsbot, 3 months ago to hardware

Back to Basics with a 555 Deep Dive - Many of us could sit down at the bench and whip up a 555 circuit from memory. It’s... - https://hackaday.com/2024/02/17/back-to-basics-with-a-555-deep-dive/ #shouldhaveuseda555 #blinkenlights #backtobasics #oscillator #hardware #deepdive #tutorial #timer