# Terrific Timer

A versatile clock board that provides an adjustable astable clock (0.7 - 480 Hz) and a monostable pulse (110 ms). Use your own 555-parts! 

- **Seller:** [8BitFlux.com](https://lectronz.com/stores/8bitflux-store), Hengevelde, Netherlands
- **Price:** €20.95 (EUR, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Retrocomputing, Kits, Prototyping
- **HS code:** 85429000
- **Product page:** https://lectronz.com/products/terrific-timer

## Options

**SAT-service (Solder, Assemble & Test)**

- No thanks, that's all the fun.
- Yes, please do! [Add €10.00]

## Links

- [Documentation](https://8bitflux.com/downloads/sb-example.pdf)
- [Schematics](https://8bitflux.com/downloads/tt-schematics.pdf)
- [Bom](https://8bitflux.com/downloads/tt-bom.pdf)

## Images

![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0MzQsInB1ciI6ImJsb2JfaWQifX0=--a07db25bc430cbdf8a871eb9a6218536ee9c2eed/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-angled.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0MzgsInB1ciI6ImJsb2JfaWQifX0=--dde694b8c46477c3dc414143f156ec0e45936366/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-buttons-zoom.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NDIsInB1ciI6ImJsb2JfaWQifX0=--14a393d401b99e8432a641876c2cc6b2782c80ee/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-555-zoom.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NDYsInB1ciI6ImJsb2JfaWQifX0=--4ec8bf28619f741fd01f6fe2ea6df2a81b3ea77d/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-frontal.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NTAsInB1ciI6ImJsb2JfaWQifX0=--bb334d27cf2e42ad1172bb098093c172ccc6d90a/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-jumpers-back-zoom.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NTQsInB1ciI6ImJsb2JfaWQifX0=--e5d01a22d2be3ae080a58c0fcdf19c5198b5ac17/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-insert-parts.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NTgsInB1ciI6ImJsb2JfaWQifX0=--0d9f29c75e93f7e3e4a33cfb42e184aefebbbb14/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-pcb-back.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NjIsInB1ciI6ImJsb2JfaWQifX0=--98e01aeb4515689e3e735424104f0c818347bd20/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-parts.jpg)
![Terrific Timer](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDM0NjYsInB1ciI6ImJsb2JfaWQifX0=--8c91dffc89d8db92f10ce398822bd5ccdf51ad91/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/tt-in-use-sb.jpg)

## Description

Explore one of the most popular and widely used ICs: **the 555-timer**. Two of them are on this board, one for each *mode of operation*. A bistable latch enables **start** and **stop** of the clock (*astable* mode). Turn the **frequency dial** to adjust the speed. When stopped, a **step** button generates a pulse (*monostable* mode). Insert your own parts (capacitors and resistors) and be free to customize either mode. For example, create a 1 kHz astable clock or a 30 seconds monostable pulse.

Link the **action**-button of the [8-bit Workbench™](https://lectronz.com/products/-8-bit-workbench) to create an astable-**burst** or just **halt** the clock. Attach a [Super Breadboard](https://lectronz.com/products/super-breadboard) and use the clock-output in prototyping (e.g. create a counter with a 74LS393). Create sequential timers by using a second board as **trigger**-input. Why not create your own computer with it?

Extend and combine this Terrific Timer with our [**other kits**](https://lectronz.com/stores/8bitflux-store) to learn and do (vintage) computer experiments. [Visit our store](https://lectronz.com/stores/8bitflux-store) to get more information on those products. 

Buy three or more connecting 8-bit Workbench™ kits and receive a **15% discount**. Use the code 8BW-KIT-DEAL in your cart.

See the documentation for details. Questions? Just ask!

## Shipping policy

- Shipping is tracked (you receive the tracking number), unless impossible to your country.
- For USA: package can be tracked with USPS as soon as it is in your country. USA shipping rates include all import duties, which are paid by me (the seller).
- No insurance, my experience is this is a farce anyway.
- Item ships within 3 business days (unless the item is a pre-order campaign, check its duration and lead time).
- Delivery is usually done within 10-15 business days, but may rarely take 4 weeks.