Pico Trackers: Difference between revisions
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== Hardware == | == Hardware == | ||
To lower the power consumption as much as possible, the board runs at a low voltage, 1.8V. | |||
The AVR on the board requires that the clock frequency is also lowered, to 4 MHz. | |||
See [http://ava.upuaut.net/?p=383 here] for more information on running at low-voltage / low-frequency mode. | |||
Schematics: | Schematics: | ||
* [[File:Picofalcon - Power.pdf|power-circuit]] | * [[File:Picofalcon - Power.pdf|power-circuit]] | ||
Revision as of 13:06, 10 November 2013
| Project Pico Trackers | |
|---|---|
| Status | In progress |
| Contact | User:Costyn_van_Dongen |
| Last Update | 2013-11-10 |
Intro
This page is about a so-called tracker for use with small ("pico") balloons, which is light-weight electronics board carried by a balloon which sends telemetry back to earth.
What it does:
- get position data from the GPS receiver
- (optionally) get other data like temperature, battery voltage, barometric pressure
- broadcast this data using a radio transmitter (RTTY, 70cm band, about 10 mW)
- repeat steps above...
Hardware
To lower the power consumption as much as possible, the board runs at a low voltage, 1.8V. The AVR on the board requires that the clock frequency is also lowered, to 4 MHz. See here for more information on running at low-voltage / low-frequency mode.
Schematics:
Andere benodigde onderdelen
| Designator | Description | Manufacturer | Manufacturer Part Number | Manufacturer series | Package | Value |
| ANT1 | ANTENNA | Johanson Technology Inc | 1575AT43A0040 | GPS ANTENNA | ||
| C1 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C2 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C3 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C4 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C5 | Capacitor - non polarized | 0805 | 18pF | |||
| C6 | Capacitor - non polarized | 0805 | 18pF | |||
| C7 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C8 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C9 | Capacitor - non polarized | 1210 | 10uF | |||
| C10 | Capacitor - non polarized | 1210 | 10uF | |||
| C11 | Capacitor - non polarized | 0805 | 0.1uF | |||
| C12 | Capacitor - non polarized | 0805 | 1uF | |||
| CON2 | 6 pin 2.54mm Dual Row Pin Header | |||||
| CON3 | SMA | Emerson | 142-0701-801 | SMA (End-Launch) | ||
| CON4 | CON JST BOX 2P | JST | JST 2P | |||
| CON5 | 3 pin 2.54mm Pin Header | |||||
| FB1 | Ferrite Bead 0805 | Murata | BLM21BD102SN1D | EMIFIL | FB1 | |
| L1 | SMD Shielded Tiny Power Inductor WE-TPC, L=2.5µH | Wurth | 744031002 | WE-TPC 3816 | 2.5 µH | |
| LED1 | Led | 0603 | 2mA - 1.8V | |||
| LED2 | Led | 0603 | 2mA - 1.8V | |||
| R1 | resistor | 0805 | 2K2 | |||
| R2 | resistor | 0805 | 2K2 | |||
| R3 | resistor | 0805 | 10K | |||
| R4 | resistor | 0805 | 10K | |||
| R5 | resistor | 0805 | 1K6 | |||
| R6 | resistor | 0805 | 1K6 | |||
| R7 | resistor | 0805 | 10K | |||
| R8 | resistor | 0805 | 475K | |||
| R9 | resistor | 0805 | 182K | |||
| U1 | GPS | UBlox | MAX-6G | |||
| U2 | uC | Atmel | ATmega328P of [1] | ATMEGA328P-AU | ||
| U3 | Tranceiver | HopeRF | RFM22B | |||
| U4 | Pressure Sensor | Bosch | BMP085 | |||
| U5 | DC/DC Regulator | TI | TPS61200 | tps61200drct | ||
| XTAL1 | 4Mhz Crystal | TXC CORPORATION | AT-4.000MAGE-T | HC49/US | 4MHz |
Parts Pricing
Upu's store
- Zo'n €33,- per setje (gps+antenne, 434MHz zender)
Farnell
- Om van alles één te hebben is het ongeveer 7,87 euro.