555/556 chips - Page 1
Forum section: electronics / beginners

author: M0BSW
author_rank: Frequent Contributor
timestamp: November 13, 2013, 08:29:17 pm
content: Hello ,Right straight down to business , I made a signal generator with a 555 timer, I now have 25 approx. 556, which I believe are dual timers !!!, anyone have any ideas how I can use these in test equipment projects ?Paul

author: VintageTekFan
author_rank: Regular Contributor
timestamp: November 14, 2013, 12:30:07 am
content: Add dual cursors for an old analog scope?

author: Stonent
author_rank: Super Contributor
timestamp: November 14, 2013, 12:42:08 am
content: You can wire just 1/2 of it and use it as a bigger 555. I have a couple 556 chips that I got to build an "Atari Punk Console"With that, one half of the 556 chip is routed to feed into the other (or one 555 routes to another 555), and you have two adjustment pots. It's designed to be a cheap adjustable analog synthesizer but will probably put out some interesting shapes on the scope. I'm working on an XR2206 based signal generator right now but when I finish I want to get back to building the Atari Punk Console.

author: M0BSW
author_rank: Frequent Contributor
timestamp: November 14, 2013, 07:34:56 am
content: Quote from: VintageTekFan on November 14, 2013, 12:30:07 amNow this one fascinates me, as I have and use an old analogue oscilloscope, have you any idea where I should look for the circuit please.Paul

author: AndersAnd
author_rank: Frequent Contributor
timestamp: November 14, 2013, 08:45:57 am
content: Quote from: M0BSW on November 13, 2013, 08:29:17 pmIf you use servos for e.g. robotics or RC models, you can build a 556 Based Servo Exerciser to test servos.556 Based Servo Exerciserhttp://www.seattlerobotics.org/encoder/200210/servoex/ServoExcerciser.htm

author: fcb
author_rank: Super Contributor
timestamp: November 14, 2013, 08:46:34 am
content: You could have a go at making PONG.http://kaput.retroarchive.org/555game/

author: Six_Shooter
author_rank: Regular Contributor
timestamp: November 14, 2013, 02:30:58 pm
content: Quote from: fcb on November 14, 2013, 08:46:34 amHmmm, I just happen to have over 30 555 timers and a bunch of other parts.....I think I see a project coming up.

author: M0BSW
author_rank: Frequent Contributor
timestamp: November 14, 2013, 06:07:14 pm
content: Quote from: fcb on November 14, 2013, 08:46:34 amI can remember a time when these were the most popular games in the pubs and people even queued up to play them, ahhhhhhhh, such innocent times.

author: VintageTekFan
author_rank: Regular Contributor
timestamp: November 14, 2013, 10:51:40 pm
content: Quote from: M0BSW on November 14, 2013, 07:34:56 amW2AEW did a fantastic little video on a basic cursor function for an analog scope:.Of course, it is only a basic primer to get you started, otherwise where is the fun in that

author: rexxar
author_rank: Frequent Contributor
timestamp: November 14, 2013, 11:22:44 pm
content: I'd just cut them in half, get two 555s for the price of one!

author: G7PSK
author_rank: Super Contributor
timestamp: November 15, 2013, 08:58:57 am
content: Make ULF transmitters or perhaps VLF ones as well? How about siren sound generators or star trek red alert sounds, they all require 2x555 chips.