Dual Timer Build

Preamble

Following on from Atari Punk Build here is a minimalistic but versatile design of a dual timer, pulse generator.

It has been derived from an even simpler APC design, which has the astable duplicated and provides outputs from both of the astables, as well as ramp outputs for each.

In addition it also has the ability to add CV inputs to both of the astables, or to use a jumper to link both CV inputs to their own 10 nF capacitor to ground.

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Atari Punk Build

 

Preamble

Following on from Atari Punx…, here is a minimalistic but versatile design of the Atari Punk Console (APC).

It has been derived from an even simpler APC design, but has outputs from both the astable and the monostable, as well as ramp outputs for each.

In addition it also has the ability to add CV inputs to both the astable and monostable, or to use a jumper to link both CV inputs to their own 10 nF capacitor to ground.

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Three Fives on veroboard

Preamble

Following on from Ha Ha Ha… 555 fun, after watching Dave’s video on the Three Fives kits by Mad Scientist, EEVblog #555 – 555 Timer Kit, I set about making a veroboard design. After a few hours I’d finally come up with a design that fits perfectly on 24T x 37H veroboard (see Veroboard).

The transistors 2N3904 and 2N3906 are £0.99 for 100 pieces of each:

or for $0.99

Even cheaper on AliExpress…

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Ha Ha Ha… 555 fun

Preamble

Today I realised that I didn’t have any 555 timer ICs, which was a bit of an oversight, seeing as I need a couple for LFOs. So I ordered 100 for £2.40, 100PCS NE555P NE555 DIP-8 SINGLE BIPOLAR TIMERS IC factory price, what a bargain..! As I had over ordered, as usual, I thought that I had better find something to do with them…

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Messrs. Schmitt, Trigger and APC (and other stories)

Preamble

Just for the hell of it, I wondered if it was possible to substitute the 555 timers in an Atari Punk Console (APC) with some other component, or components.

After seeing some Schmitt-trigger inverters (CD40106) used in oscillator circuits, see Swingers, I thought that I would come up with an alternative design.

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