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LOW-VOLTAGE CUTOFF SWITCH
| Jameco Part no. 2161369 | |
|---|---|
| Manufacturer | JAMECO KITPRO |
| Manufacturer no. | CJKIT-20462 |
| NCNR (Non-Cancelable, Non Returnable) | |
| Catalog 132 , page 164 | |
- Kit Instructions [1100 KB ]
Low-Voltage Cutoff Switch
Experience Level: Intermediate
Project Overview: A microcontroller-based voltage cutoff circuit, currently in use on several motorcycles. It is designed to monitor the voltage level for the battery, and activate an accessory circuit when the level is sufficiently high. If the level drops below a calibrated level, the accessories are cut off. Check out what others are saying about the Low Voltage Cutoff Switch project build!
This circuit has 4 connections to the motorcycle:
* ground (from battery or chassis)
* battery +12V
* signal +12V (from the ignition circuit or a headlamp / tail light)
* switched +12V output from the relay
Accessories will be wired to the switched + ground connection. The signal line provides "house" power, drives the microcontroller, and will be measured to determine whether to activate accessories. This line will draw very little current and will not be used to operate the relay (~160mA draw). The relay will be driven from the +12V battery source, and will operate the switched +12V line.
Please note: Due to inventory packaging methods, you may receive extra components for some products. Some items may not be sold at Jameco and will need to be purchased separately, please review the materials list below. You will also need programming experience to upload code to the PIC MCU.
Kit Includes:
| Part No. | Description | |
| 37197 | IC socket, 14-pin, machine tooled | |
| 178597 | Transistor, 2N3904, NPN | |
| 51262 | IC, 7805T, TO-220 | |
| 333201 | LED, Hi-efficiency green, 565nm | |
| 2157167 | Resistor, 1/4 watt, 10k Ω | |
| 2160956 | Resistor, 1/4 watt, 3.3k Ω | |
| 2160964 | Resistor, 1/4 watt, 470 Ω | |
| 2158864 | Resistor, 1/4 watt, 4.7k Ω | |
| 148583 | Relay, enclosed style, SPDT, 12VDC, 40A | |
| 149948 | Switch, pushbutton, tactile, SPST | |
| 198952 | Capacitor, radial, 47µF, 35V | |
| 151918 | Fuseholder, in-line | |
| 10373 | Fuse, AGC fast acting | |
| 223781 | IC, MCU, PIC12F675-I/P | |
| 645677 | Prototype board, 3.5" x 2.5" | |
| --- | Instructions |
Required Tools:
Club Jameco Project #20462
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