Product Overview
Educational Timer and Switch Debounce PCB Assembly Module
Condition
Unused new old stock (NOS). Complete unassembled electronic kit including an unpopulated printed circuit board, loose components, and original assembly documentation. Circuit board silkscreen reads (c) 1999 ERI and TIMER DEBOUNCE EBTD-9 SMD. Included instructional manual is dated 12/08/03.
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Product Overview
The Electronic Rainbow Inc. EBTD-9 is an educational circuit assembly kit centered on dual LM555 timer architecture. Designed as an Electronic Educational Block, the module provides practical hardware demonstration of timing generation and mechanical switch debounce suppression. Operating in monostable mode, the board eliminates spurious contact noise from pushbutton switches before sending clean triggers to counters or logic systems. In astable mode, it operates as an adjustable clock pulse generator. The board includes provisions for driving an onboard relay or driving loads up to 80 mA.
Key Features
- Dual LM555 timer architecture for independent or linked circuit configurations
- Selectable operating modes supporting monostable pulse conditioning or astable oscillation
- Dedicated output stage capable of switching a relay or sinking up to 80 mA of driver current
- Unpopulated printed circuit board measuring 2.260 inches by 2.765 inches
- Complete set of board-mount components including IC socket, trim pots, capacitors, pin headers, and resistors
- Original instructional booklet detailing circuit schematics, operational theory, and step-by-step assembly
Applications
- Clean switch debouncing for microcontroller, counter, and digital logic inputs sensitive to mechanical contact bounce
- Clock signal generation for breadboards, timing circuits, and prototyping experiments
- Hands-on electronics bench training for learning through-hole and basic surface-mount component assembly
- Benchtop trigger delay generator for relay sequencing and small automation projects
Frequently Asked Questions
What operating modes does this module support?
The circuit supports monostable mode for clean, single-pulse generation to eliminate mechanical contact bounce, as well as astable mode for continuous clock oscillation.
What is the current rating for the output driver stage?
The output circuit driver is rated up to 80 mA, suitable for driving small relays or signaling logic inputs.
Why buy this specific Rainbow Kits EBTD-9 module from PartsMine?
You receive the exact unassembled vintage kit shown in the photos, complete with documentation and untouched components, avoiding the uncertainty of incomplete lots or missing manuals. Shipping is an $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Before clean square waves were taken for granted, every mechanical toggle needed honest conditioning to play nice with digital logic. Grab your soldering iron, follow the trace lines, and build yourself a rock-solid timing block.
