Circuit: Diagram Of A Timer
Multi Mode Timer Circuit
This timer kit contains seven different timing modes using only ONE IC and some support components on a single-sided PCB.
Universal Relay Timer-Switch Electronic Kit
Set this relay-based timer for anywhere from a few seconds to about 15 minutes so that you can time on/off almost anything.
Count-Down Timer - Relay Output Switch
Timer kits are an ever popular item with the hobbyist. This uses a 555 timer IC and goes from 8 seconds to 8192 seconds.
PCB plans and circuit diagram (schematic) for what appears to be an extremely nice 100 watt guitar amplifier. Includes preamplifier and power amplifier circuit diagram and PCBs
Timer Circuits Relay Switches
Timer circuits are handy for many experimenters projects, not to mention the photo lab. This kit has three separate circuits that can be used individually or together. Each circuit has a separate 5 Amp relay. Circuits operate on 9 Volt DC.
4 Comments - in Miscellaneous
Metal detectors a tons of fun. These metal detector electronic circuits will enable you to go hunting for all kinds of cool stuff, wherever you like!
1 Comment - in Sound Effects
An electronic circuit that uses a 556 (Dual timer) IC to produce a two-tone train horn sound effect. Equivalent circuit using two 555 timers (single timers) is given.
Shows the pins and wiring instructions for creating an RS-232 Null Modem for your PC.
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