HL2 Filter Board
About the HL2 Filter Board
HL2 Filter Board is an open source FPGA PCB design by softerhardware, published on GitHub. It is a 4-layer board measuring 100 × 49.9 mm, with 112 components from 62 distinct parts.
Its main chip is the EP4CE22E22C8N, from the FPGA family. Other key parts include the MCP23008, ST1S10PHR and 74LVC1G00. By type, the board carries 46 capacitors, 18 connectors, 16 inductors, 16 resistors, 7 relays and 4 ICs.
It belongs with the rf & radio designs in this gallery.
From the project
A second generation low-cost amateur HF software defined radio transceiver.
See the main Hermes-Lite Web Page for the latest links and details.
This is a work in progress to create a low-cost software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project.
Main components on the HL2 Filter Board
HL2 Filter Board bill of materials (BOM)
112 components, 62 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP23008 | SSOP-20_5.3x7.2mm_Pitch0.65mm | U1 |
| 1 | EP4CE22E22C8N ULN2003LV | TSSOP-16_4.4x5mm_Pitch0.65mm | U2 |
| 1 | ST1S10PHR AD8692 | MSOP-8_3x3mm_Pitch0.65mm | U3 |
| 1 | 74LVC1G00 | SOT-23-5_HandSoldering | U5 |
| 1 | 67997-410HLF Audio-Jack-2 | PhonoRcaRCJ-04x | CN1 |
| 1 | PJ-102AH Conn_01x20 | Pin_Header_Straight_1x20_Pitch2.54mm | CN2 |
| 1 | L829-1J1T-43 SMA | BNCEDGE | CN3 |
| 1 | SJ1-3525N SMA | BNCEDGE | CN4 |
| 1 | CONN_01X03 | Pin_Header_Straight_1x03 | CN5 |
| 1 | Conn_01x01 | Pin_Header_Straight_1x01_Pitch2.54mm | J3 |
| 10 | TST | WirePad_0.5mm | P1, P2, P3, P4, P5, P6, P7, P8 +2 |
| 2 | TST | SolderWirePad_single_0-8mmDrill | P13, P15 |
| 1 | 1T | WireConnection_1.20mmDrill | JP1 |
| 7 | EC2-3NU | RelayDPDT01 | K1, K2, K3, K4, K5, K6, K7 |
| 1 | DNI | Trimpot_Bourns_3314G | RV1 |
| 1 | CDSOD323-T05LC BAS40-07 | SOT-143 | D1 |
| 1 | LTST-S220KFKT BAS40-07 | SOT-143 | D2 |
| 1 | LTST-S220KFKT 1N4148 | D_SOD-123 | D3 |
| 1 | MPZ1608S601ATA00 FB | SMD_0805 | FB1 |
| 1 | SRR4528A-3R3Y 1.8u | SMD_1812 | L1 |
Show 42 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SRR4528A-2R2Y 1.8u | SMD_1812 | L2 |
| 1 | SRR4528A-3R3Y 10T | ToroidT37 | L3 |
| 1 | LQW2BASR24J00L 1.8u | SMD_0805 | L4 |
| 2 | LQW2BASR27J00L 3.9u | SMD_1812 | L5, L6 |
| 1 | LQW2BASR24J00L 220n | SMD_1210 | L7 |
| 1 | LQW2BASR27J00L 220n | SMD_1210 | L8 |
| 1 | LQW2BASR27J00L 1000n | SMD_1812 | L9 |
| 1 | LQW2BASR33J00L 560n | SMD_1210 | L10 |
| 1 | LQW2BASR33J00L 390n | SMD_1210 | L11 |
| 1 | 680n | SMD_1210 | L12 |
| 1 | 270n | SMD_1210 | L13 |
| 1 | 390n | SMD_1210 | L14 |
| 1 | 1.8u | SMD_0805 | L15 |
| 18 | 100n | SMD_0805 | C1, C2, C3, C4, C6, C7, C11, C13 +10 |
| 1 | GRM31CR60J107ME39K 100n | SMD_0805 | C5 |
| 2 | 1000p | SMD_1206 | C8, C10 |
| 3 | 1800p | SMD_1206 | C9, C21, C23 |
| 1 | 22uF | SMD_0805 | C12 |
| 1 | 100uF | SMD-1206 | C15 |
| 1 | GRM31CR60J107ME39K 3300p | SMD_1206 | C22 |
| 3 | 150p | SMD_1206 | C24, C26, C33 |
| 2 | 330p | SMD_1206 | C25, C39 |
| 3 | 270p | SMD_1206 | C32, C38, C40 |
| 2 | 180p | SMD_1206 | C34, C44 |
| 1 | 100p | SMD_1206 | C35 |
| 1 | CC0603JRNPO9BN150 39p | SMD_1206 | C36 |
| 1 | CC0603JRNPO9BN150 560p | SMD_1206 | C37 |
| 2 | 220p | SMD_1206 | C41, C42 |
| 1 | 68p | SMD_1206 | C43 |
| 2 | 1500p | SMD_0805 | C47, C49 |
| 1 | 680p | SMD_0805 | C48 |
| 1 | 22 1% | SMD_0805 | R1 |
| 2 | 2K2 1% | SMD_0805 | R2, R13 |
| 1 | 56 1% | SMD_0805 | R3 |
| 4 | 4K7 | SMD_0805 | R4, R5, R8, R9 |
| 2 | 18 1% | SMD_0805 | R6, R7 |
| 1 | RC0603FR-072R2L 2K2 1% | SMD_0805 | R10 |
| 1 | RC0603FR-0735K7L 6K2 1% | SMD_0805 | R11 |
| 1 | RC0603FR-0711K5L 330 | SMD_0805 | R12 |
| 1 | 6K2 1% | SMD_0805 | R14 |
| 1 | 330 | SMD_0805 | R15 |
| 1 | DNI | SMD_0805 | R16 |
HL2 Filter Board design files
The KiCad project lives in the softerhardware/Hermes-Lite2 repository on GitHub; these links point at the commit this page was built from.
HL2 Filter Board: common questions
What microcontroller does the HL2 Filter Board use?
The HL2 Filter Board is built around the EP4CE22E22C8N, from the FPGA family.
How big is the HL2 Filter Board?
The HL2 Filter Board measures 100 × 49.9 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the HL2 Filter Board?
112 components, from 62 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the HL2 Filter Board design files?
From the softerhardware/Hermes-Lite2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the HL2 Filter Board design in my own project?
The repository has no license, so all rights stay with softerhardware. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the HL2 Filter Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug FPGA firmware against it before you order a PCB.
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