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| Astable flip flop from Diptrace manual | Low power gated crystal oscillator |
| This is the best place to start, because the manual tells you step by step how to make it. It is a simple discrete flip flop. use it as a low frequency signal source. # flip-flop | Simple circuit uses CD4081. it has a 32.768khz crystal, that is gated by any length square wave pulse. great for clock type circuits etc # OSC1001 |
| download schematic, board files SS | download schematic, board files SS |
| LM324 LED audio level meter | Discrete RF preamp for AM broadcast band |
| This circuit uses two quad op-amps to form an eight LED audio level meter # VUmeter | Uses 3 transistors. needs no coils, perfect for pulling in those far away stations # RFamp1001 |
| download schematic, board files, text DS | download schematic, board files, text SS |
| Bounce less Push Button Module | Digital Lock |
| zero current draw in idle state, bounce less push button 100uS pulse # DBS1001 | Uses 0 > 9 keypad programmable 4 digit code. # DL1001 |
| download schematic, board files, text SS | download schematic, board files, text SS |
| Single Stage Counter Module | Single/dual Siren |
| Can be combined for larger stages # SSC1001 | Just like police/fire etc # SIREN-1001 |
| download schematic, board files, text SS | download schematic, board files, text SS |
| Display Board single CC Module | Display Board single CA Module |
| Can be combined for larger stages # DBScc1001 | Can be combined for larger stages # DBSca1001 |
| download schematic, board files, text SS | download schematic, board files, text SS |
| 4 Stage Frequency Counter | Audio Stereo Pre-amp |
| For audio up 10Kz or other counting # C4S1001 | Super Spec's @ 2 mA 1 IC only |
| download schematic, board files, text DS | download schematic, board files, text SS |
| Self-powered Sine to Square wave Converter | Bi-directional Photo Counter |
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Converts sine to square waves without a power-source Can be used in a probe case or as part of a larger project. |
Counts the number of people entering the room and shuts lights off only when room is empty. |
| download schematic, board files, text SS | download schematic, board files, text SS |
| 4 Watt FM Radio Transmitter | Bot Robot by Seth Koster |
| Very detailed instructions at FM-KIT SS | download schematic, board files, DS |
| download Schematic, board files. If you need the hard to get aperture ferrites VK200 we have them pre-wound 4 for $4.00 ship worldwide $3.00. ship extra lots 50 cents per extra lot. | Based on original research done by Mark Tilden of Los Alamos National Laboratories who created and owns the BEAM patents, information found on Harold R. Ilano's webpage and on the Costa Rica BEAM webpage. instructions |
| VO Fuel Controller by Seth Koster | Simple Tracking Dual Power Supply |
| Detailed Instructions at VOfuel | Uses LM317T and LM337 and LM301 |
| download schematic, board files, SS | download schematic, board files, SS |
| Simple Power Supply LM317 | Auto Fan Control for Power Supply etc |
| Detailed Instructions click here | Detailed Instructions click here Turns on fans in power supply or home as needed. |
| download schematic, board files, SS | download schematic, board files, SS |
| Solid State Relay Module | Audio Amplifier LM386 Module |
| Detailed Instructions click here Use as stand alone or as part of larger circuit | Use as stand alone or as part of larger circuit no instructions needed. |
| download schematic, board files, SS | download schematic, board files, SS |
| Fluid Level Sensor Module | Logic Probe with Pulse |
| Detailed Instructions click here Use as stand alone or as part of larger circuit | Detailed Instructions click here uses through hole components |
| download schematic, board files, SS | download schematic, board files, SS |
| Heat Sensor Module | |
| Detailed Instructions click here Use as stand alone or as part of larger circuit 10K Thermistors 25 for $5 plus ship $3 world wide extra lots ship 50 cents extra per lot | |
| download schematic, board files, SS | |
| Function Generator Intersil/Harris 8038 | Police Siren |
| Frequency Range 10 to 20k for audio work. Detailed Instructions click here Lab Grade | Check with your local police before installing in a car. her are Full instructions click here |
| download schematic, board files, SS | download schematic, board files, SS |
| SCA Adaptor for FM tuners | Model Rocker Launch Control |
| Listen to commercial free music on 88 to 108 FM radio. Full instructions click here | Full construction details click here |
| download schematic, board files, SS | download schematic, board files, SS |
| Motor Controller for DC 12 Volt | Low frequency crystal |
| Use it to control motors for robotics etc | Below 500khz crystals are tricky. use this circuit. Full instructions click here |
| download schematic, board files, text SS | download schematic, board files, SS |
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All libraries and data sheets are presented here on a "as is" basis and Technology Systems is not liable for accuracy of material. They are made for the hobbyist to use on a inkjet printer using clear plastic sheets from stationary store as over lay for photo etching or the transfer paper type. If making a lot make a prototype first to check on the accuracy of the libraries and pc board layouts. |
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